1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e8f9a357124eb015c285f3ea1dc2a97e5e9b6028bad8bb2f1890e122c82dd. Chain 2 (Bitcoin): anchored in block 953961 (2026-06-16T14:58:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27ae2bf8-cde6-4b09-82c8-549029bf86fb.json and https://artists.proofprofile.net/proofs/artist/27ae2bf8-cde6-4b09-82c8-549029bf86fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582f12a8021edaaec0049419dfcfb91b4f7f448c6540ac33c21bcca503076f0c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN92210477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647651eba171f3748944e6b54b71e4ccadfd93c81a82ffaa93073077002c3a24. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2215200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a2007fcd5167d2fa82dc259f135e8833b96f0a7fa474535daf297778c7177. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6H2262443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9f46527fb9ea171b161549955ab96bdea3d7874d2da986704f5968cf5f9e6f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42273905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c56dfbaf1001be29dc793cf188409a824149d121082f002af676d64f04ff1f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2215201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90de1c7a9bf5c1b3f1eaf5d76d958fb1b836bc14e4657788ab23e57866aef37. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2132852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5bc941fb4bd38a35bd1be4f69cca99ad95738f01df74977afc63b7096f3072. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2215204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54bdd36d9ed301961a80ad2a9e4ac6352c9b56e5bdc75ec59c1f740288dc57. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6K2230864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e6a4560cb5a195a6201dd8dfacc6feb3b10cbd51eb0ef5052c69d9c19b0b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2215208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe73071dc07243c91e3829b091ce7906abc5ae85d969cd8878444a5e529b67. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32290142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9929d480a12cd94930f4aa4638964212ce655945c52580291d4d52b8f48df960. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2215209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840810097e9826fd73e206e690fa6139cf0e62da4c70f4edc0120cc8379967e7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542370603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac7b3826a5b7d35ffe56a5edbfbd003268b26ede89e9549c5f2b8eb86542792. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542370606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3d575ea545a89ec2946a0803a025f67619e80c1d46747518ac43390f80fa7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542421852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c71866e52cf8c2aeeffb9ddd3c5f83429d8d0308b44d108da4e144f6a248b5. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542415424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f6a4a10938234e4b56af77ad5b63e24fa2998f8ed3d81dea023ab171345e73. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542402476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c71866e52cf8c2aeeffb9ddd3c5f83429d8d0308b44d108da4e144f6a248b5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542415424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5718810cc98af038ce597f38d967cccdf62173b70430524ae5b597ce8f26c9b3. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542228039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd777cefeeb6970e18db29d0773849904e35358d971f6b6827a31c4014eb0d0. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542174240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c9875b3e7007be55dbf2b74b729dc28bb454dfc4e16e7798792321b0c08ce9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032396915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b322d2d2a09d7621eb3c39b1474f74c70412dce9e7f4c8adeb676421e7b455. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032393114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8856a911d509c795817f21148b4d55aebbcf21306f4a741742a773ebd6e344. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032396917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71deef01a7ef2596b1aedc4311386152b0f9dd2b8c708af89d984e3ea0ca36f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032396552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38f1dbdabcbedab5823d7e99e5aaf96e7b60daf1a5859b7c2bd09e80838d4f0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032396919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce379950debb0c7fb3fc2247b11af5afd5666387f0a270b6c004b278661b4d8. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032396923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9050567926510f23d6978acfd8fab3d63c36726bea3cc24aafea8495d5e86261. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542128172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd654dd79e10cd36e10ed632f6209c79a1b55fe6db92265d123b098270acf66. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542426656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e58885eff056450d94438a72f713c752ef99bb66803bc358bce54913a95af. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542189316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f7d53ff6fb9324d4cbf8017fea36d6de0f03b49c79c33ce0b4f40f0ed36367. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84334bcd0b979832f8102c023e2ff348def266f0636639a0aff1a41aa4f82c90. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c5c4134b28ec17d18b20709934ce56dcb11b12021acf095770b2d5e6339bc1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd5410608ead385e3166978b00ae6c28118acdd1e09a4c4943ee78ba8f450c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7601388f5f6227bbe037dcbe2e2db441d9ce4a86f03957fb9170005526c67a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788460f3815d54162fb9af6172bb6ae79b40112a4dbebefe362523d26db24822. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62444971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc285fafeb6748912ecdc195f2677948169a2cd342ab740eb99f328be66551f8d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc31098375de75454fe0d75845c134ac9ad1825cb0d6a8c596148ca5fb6d8944. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21f65a8836a4265071005cd4e4a17494374c692df6e3c6a7b13fe0acb7d11b8. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b250fb356a67f00ce694c384541800bf5ba8f4355969217f5e81c4fca8232ff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62444969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3327effd1a89441c4e0c23c751cc7e0bb42320242caecb67a4df018b540db218. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1O62445153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1371b8a70e2a1d362983322b42306c9996eb25bdbdf4597ac39216128622012. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHD522100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40cbe1677e49969db65eae702565a8eb2f263594bde50b95fdae1eafeca03ff. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHD522000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0ea7ca69e8f6021104f4e5ca595fd4db3970413baf3861b8f316ad33a10001. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHD522100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fddc29260d7b75bc793b6a668b38796d6fd9355ac56fb49ee0e9a64503c034. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6G2246167.