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 0x35d929c2ed870eb67f25a258a631af2e749aa20b36529e21113f9e74fc4d92db. 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/868d49b3-5da9-486a-96ec-13d9735beaed.json and https://artists.proofprofile.net/proofs/artist/868d49b3-5da9-486a-96ec-13d9735beaed.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 0x6d899ddc19dbcc3b21e85065562c54d54ffb88337da7e5119212e4f153dcca04. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/LBA0H1700680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b54a44502ed650fc663fd08438a688e7f0b802ae7a10c664dc57f53d19b3245. 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/LBA0H1700682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee55e5f68d613bcb176e6d23cd4ca8b611da71998232104bf9bff54a42f33d18. 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/LBA0H1700689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f8224f4f2c2290c6ee7725678367cf2d9e079fc268d3740a3147bee25c4f43. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/LBA0H2008726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5263ea397ba6404943b71da89ea78612d4f54c7210f515e6bff20a0e1aeb0b9d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/LBA0H1700693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e94e74dbabffc24cc92b980f4a605d29ab30b769b0f74aeca578dd84c06585b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/LBA0H1700695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4314fd86093e5e2d9c25156e089715b46572bedb19318c45a6c8651d61029b41. 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/LBA0H1700144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348010b94e27d56a070c77cc9c76c2934fab80fc563d11f03f686695b59d9894. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/LBA0H1700696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04cf9929767d7a5e3b994bbe3aafe9b7fe16f90f883d55a8881255222348baa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/LBA0H1700699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc375cf475d36ca9c8e2b919f4ed29cb42d33805d0f30928f2b8fe0ac516c0b2c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/LBA0H1700743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b46da9673a072d67f611ceafbba2bc03cc222269d4d77c6d4a4c74d4ebf7bd0. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/LBA0H2000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350ea8d6138b6b5b6a7b2d691196920f5eba99831c82aa4796ad1be5512a91a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/LBA0H2000662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40b9ae2d9b18e74f4c230210399b127d7257c23885f86bdb3b98bcd6b082f75. 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/LBA0H2001463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6117da72e4304696481c38e2a62db0316f97429cff738a4149d1f6612347fa. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/LBA0H2001529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95301a2c1699a8d524793509d53cd70ebf9f471d0dbd9fe2bfebf373f2bf014e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/LBA0H2001798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc0fcd8a582cfec64dd7e92c8ddc38f291ad97c648fe7083c5e5354b7f93146. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/LBA0H2001800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cce814a94d4d04da8033f11bf45af65f68534dc9ff81371ad3ff12046f94e42. 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/LBA0H2001801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c4cd6584d3ae32ac9c773bdfa98604111b202e38e153643ab7139a0ca69726. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/LBA0H2002729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf83992f89ce8bf83cec0ba54eba794cd6e55856fdaedb1dd3bfde7ca8447fc9. Chain 2 (Bitcoin): anchored in block 957534 (2026-07-11T07:10:38Z), 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/LBA0H2005766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766a59347829ed1619b8d460905af1ad7eaf269fbaaf3bffa713d9d0ad323571. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/LBA0H2006308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ad908aedfa54c48c51e18a5f21f632544191ef725731ec55f4b3481407a54f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/LBA0H2006540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c933cbd1e131a90a14180e1aec0f02d7b6f801488226b6873bb3abb9ddfe78. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/AEA142402047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6359e8c750cf2f6e9b48b7151194e74a616607f499f8ea78197be7562cd18f9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/AEA142401072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b992901df73a3980336e853483e95ef877438cf0c1a3ecb60694424a3a08e30. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AEA142404623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834ebd9fc4755bef8eb0210149d82031feca5f4ad419246ed279f801524e87da. 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/FR9W12324294.