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 0xa419624cf688288b63117f5ae42a955eeaae63a38a2c08af073cebc59fa0f4a4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94b5d6fb-a612-403b-af65-7d27e7a90fca.json and https://artists.proofprofile.net/proofs/artist/94b5d6fb-a612-403b-af65-7d27e7a90fca.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 0x97561cec873e7f9ca3498272a4bdee1af5409ea0f4e288572f5d06ddeeb74133. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZA34K2000476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d89d33d74d9167b19dda8f4e59c65b8798cb9ef8467d45905d0a6dd6291316f. 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/GBKQU1723478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d2dbe318b3e8092ebcb5e1b97fc47e2a5f6cfdfebf36398a6a8dc960870303. 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/GBKQU1721095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856808613a5020176785b680d461d51459f005b730be957f8b90f42e012611c4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZDA82474698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f767be4f1139a7d2f7e473884db962ebe8fa78a08ffdaa75c97c9303327605. 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/QZDA82474699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e59fef7019fb4a20f3bc3faff541b24d882d00a53be7140b66d9e6bd55c0e3. 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/QZDA82474700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfb44ea3ad2899539f08cfdc4881c0fbf586251a8b69ea583fade70208afe32. 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/QZDA82474701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a527f47c16ae891d3578ba0754c4d0ada1cc94ef08bdeef66f37ec70a98afd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZDA82474702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a7fdbfe253503c3fc7580651e4b3ecf42c41fdf679ed8008994b9dc14106e2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZFZ62446578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84388ea5ef89e9015cf0ce667761b99ff22923ca608d6ff5c47d97edb64e2a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZA56E2420117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041a53c5434c05d586fb15effd039c8a82c4a053e3983a8938767e971839a890. 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/ZA56E2419775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb213e006cc8684b21ada661a41fb8f9dd70a1785ef72a9ea102fc754cfff17e5. 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/ZA56E2419776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e53d0e9ee22a52d0b3307c4c30b578905166a0c9dcbfaf0e83bb917d43ff12. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ZA56E2419777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b8359156db20b0f8db695df32a88609eef15d707e67595c640ec594f3c192. 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/ZA56E2419778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edaeeb8c7a992ef4dbd2168a5408199616d724cda7dff5d64cb84acdc5045d9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ZA56E2419779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb213e006cc8684b21ada661a41fb8f9dd70a1785ef72a9ea102fc754cfff17e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZA56E2419776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cb3e9da518f4fccf69df971bb111a7608c0b88f6f5c03ea408fa30e20fa32f. 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/QZWFH2411816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9abcc051ec0811ae31280718abd2b56241511953d7915784d05505ba23affc. 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/QZWFH2412348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2945c470b5e209a419dcc703c3ace1036ac35092d9574f1b6663f4c87f14b33. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFH2481206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041a53c5434c05d586fb15effd039c8a82c4a053e3983a8938767e971839a890. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA56E2419775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e7ef02caea5caa56fbfd6446b7fe5b0ede693d6bb032cce53b4b1037f97d0f. 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/QZPLS2447298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feb62d1e1a490fcf2e3e588dfc26f608e7a8009ebb7a6755b874c0ef82a6be1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZK6N2487061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816f7c3d3ff0179c95e6aaaacb0e44ec74f6b2eb0ee37263894b50d90cfb6e60. 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/QZHN62401450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb73cc9fd7622e9b418e08da31d75cf15d89d0087ae29d130bb2686a2701a4e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA56E2303696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c2ce967cbc81b06c799b62a2be472efa0006e3b0e0e7eb3b1480e451a06ea2. 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/QZDA42340751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef76aa3c02168b26b136eacaadf3f137914ac15dedca5ec04a06b183b74a1b7f. 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/QZTAW2273161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dae9f6e3c54820ea9dea365cf0f3e999334ba522a882722fcce55f4ac0823b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES61895493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdf635f35cc876e7d523e87992eaed2ce86feb47362718477df051b3cac8e4e. 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/TCAIH2404334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a121e5bc8c094b7cd6fe5ff215dee965b310b208317aa38ea4f0d3494c11bb7. 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/ZAW782100342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b48f43c76556bca964609ae87e901f3585a33276a9e257939ae0a86cbe731. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ZAW782100343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae8fefc36ad78c6f9ede6171409e92394f2dd696ce2e38c9aac1e2b2684c2c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/AUMEV2368383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccccd5895d51e71d15f206c119079e68cef0ca15998f4c57e947defc7fe9b18a. 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/QZTB32252528.