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 0x24f3fed181e9ebd1d7d08b885e1cfd4c74dfb10264cacd9bffcb0e01ba7b62b2. 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/478da99d-b5ae-4bb0-84ed-d145ea4130f4.json and https://artists.proofprofile.net/proofs/artist/478da99d-b5ae-4bb0-84ed-d145ea4130f4.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 0xd41b79e09f8251d279995a4713b712c14500c8031105d6c9d17192b976acf434. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKQU2038661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22ff5263c007d3f478b86cbf8214c9cd39241584b1098fa012f4b4b660ee18b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR0018687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f8811eba881d2fad422f3aa6b4c770b9438b2a748a1f7d614f3fc2ea03165b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CA5KR2201079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c7c0ecea285d12707d1b221a632929bd48edd99ef73e5e821677d6fffdde2a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9b847efd7c77eee6b8a05e5a30cc182eb8ba39778829c3a91c882ab12f9023. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEH742301290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc42cf10f5369123769a388208a3799c1de7886a489f1b8fca59bcf77edcadda. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2347807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d4e0fcd0651051209818d59eef3bbbc9dc2d9b4fed453451ff1519f945c245. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CA5KR2344820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8882c92a507a476fe90264da709054334705f46e543f94904b8ed267bfc7d0f. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBLV62303982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7e9ad09e5eae39d9ff7fd523841b267e49a3684256583ada0778bc984b3211. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZG2X2400914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b34d3f232cb5153d660e46b2a49f29ceb6483627269950fc2169029d1f3ba5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USNRS2544115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ccc0ad2a2f7f0e3a7ef6037457135a03d42db0b3aeda88661ed44e405a9308. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GBKQU2551847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8dae67fbfea21dfb88a900d1089e92d5d7873274768b5fb4e3996606a9dd7c. 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/DEH742402897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72121d5fb1ea67a19ac29edfafbcf1bdb01401d0dbd9b205ca6db6ac0468021d. 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/DEH742402898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d23f6dc58d19a99a09ee65354603524047dc43fb2d63fff7b6198213663fc4. 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/ES98I2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd3d9a85d76b660c883f60a035732633dff18860af5e266482690602c906837. 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/CA5KR2438263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a388f8a69ae784ef7374ebe2f40d5f0c7fb26e989b10dad26971658eb6276f. 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/CA5KR2353538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c0bfff454bea9462152a68bbb9a84252944d712b091211b7a81ee9c6a668db. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CA5KR2488666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02747d6a73c7fe87e835f762c59164a5d6596b846e3f930c58e7be0809e351d7. 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/DEH742161744.