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 0x8605e29576e2ca754b2b609585966e9df30eb6dc8cad5f4e1617945870618778. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b55f436-ef87-4671-9d04-d08127e4e6f4.json and https://artists.proofprofile.net/proofs/artist/7b55f436-ef87-4671-9d04-d08127e4e6f4.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 0x017f7c6ec479a9c332035655a624d8e1d89f9c7ffd7f40b79aad3c5cd1457e6d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM42K2388485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00c6fb0b7f6e2972c2a118fd1d7bc876274611e09cabcda0535e40fae032fa. 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/QZS642310112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09888abf427ed8f91f3753b6591b2a8a0e74213788b6d4a83e5e7b8b6de53b0a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM42K2304671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fae0c94971470f71f2559980633d49c7e09e59025bcadb995fc4e431f8efb76. 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/QZMHM2315922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26087daeafe0a5429620b2338241215db987113a57ca736364bf9e77c7f1f5f. 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/QZS642381714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709b5c0427a3398f1675dd50e6738683a4269b98ec51c250ee0ad7f20ac1a1e2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMHL2390327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50436243cc4d9f55ca56d31dcb4fa1dcc5c997e96d85d02fda317586d463f6dd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZMHL2355489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa731c65c02ea2c8fc68f13f7745cc1c88e170400847df8a412bdaa09e0f0c4b. 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/QZMHL2370529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98df9e0e5ffe5eb6f8e9c1dc5035ea680003e459415b8cd1cbffc1a8b814da. 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/QZS652395520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cc76241b1cbe52ee8e4352b32bc1ce236ac0410ad52c8838103ec1d990113d. 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/QZMHK2357863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0675340e4b565d45d8a5b6dc96d929701b1a3bf2c7145a7669465d7d30452. 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/QZS652399599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463a1924f827acb030240fd31c9e1d5ba61e027e80fe08b20bda87d2084308aa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0L2379558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cc76241b1cbe52ee8e4352b32bc1ce236ac0410ad52c8838103ec1d990113d. 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/QZMHK2357863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1b8ebe0acf11ab186ba0c579fc8f99e193ccee2d7359ff0cf4875ed4c849d1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZS652471514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cc5799e2c3464d346916dcc859902a783b38d228975d9561b1658cacd15a51. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMHK2449339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f5afc8982ab08c8fe00eb1d84d05dcb7f9fcdb710aea1353474533585a290d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZMHL2422756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3754c2b2f2acad61d974307bec65fe09be473725a69f3a64256acdf938374c47. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZS632439807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf048465790770ae944964cf3d4c32a8deb3900b7d7277f69e42dc85ef4f64cb5. 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/QZMHP2401509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e43baa918da6e77d60e2a6d565847b0d2c6a7d0ea6d35a5b95f7b6819b1e4c. 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/QZS632470205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae34bc79df4b16462ec879f30f57cde602b86e559f0614dd724e06ff27431a2. 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/QM42K2476444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8df91467a06fb1413b8fd23512c05a747e4e3533354f81d7667c00f1af14e9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM42K2421339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2c023a7c90a3bf6f5d656a75be7d686bb6a762173bbc3e94afbc4044551a2f. 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/QZMHP2463501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b7807692efb85c980dadc04b939b9dc6e71c8cc8010ffacd777a6982d1f12b. 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/QZMHP2411408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d761f2a1867d0f3aafd7a9a2475022316417d197fff8bb7dfa6ac92ab1a5c31. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX762431432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474a3bde06b5322b3b812dc6e47b9444d65e85062f45790ae7691568079d9f7d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAHX2431748.
Knoxville Bound (20th Anniversary Edition)