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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaef669154fba46d7f5f8cca751c582f9c85ec517d03de0f249e580648f0012a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba3421c6-8d3c-465c-a4f5-3a5bc07338ab.json and https://artists.proofprofile.net/proofs/artist/ba3421c6-8d3c-465c-a4f5-3a5bc07338ab.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa057cd618791a55c53d05dd3633373d4b3453005ab0052a1e422d0803e0a41. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:53:22Z), 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/FR33T2290036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71139b61a3b8f59962afd891d11ac7615cfd445fdad18a25cf7d20c947aca92. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR33T2290037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891d35eb73c8c6b16c9743b32a30d14af8e8412d70953a0120f5c6e53946819a. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:01:53Z), 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/FR33T2290038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31453a23876146bce5925773577266982654703d1d00d6ad3da57f1bbac05756. 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/FR33T2290043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865ac56da7f79a2fb16866d77be82c4ef1e2a073322b380af9d42ed4a61c4cc1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NOXCW9500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40425123c320fd13e7e6d7b36b2cab92e02c3987ca73e4366ea6f1811d755bf2. 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/NOXCW9500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980d9d270ebd9fcf8537e7cd8887fae450571360d9ec7b7ea2af2a38aafc8068. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NOXCW9500405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dc3a4d7c25ade64de6cf137d446ae15688968ccb109407587f41b01d521aed. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NOXCW9500406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015359beb72304e11e58eb165d00ce4c4701da1002dc1af5e1108c63e203bc2e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:46Z), 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/NOXCW9500407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66353bb32396a4844401f7e7fc486140c37d2202c4a90629a430b7cf9a3b72bd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NOXCW9500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79463d1e5fc1cba34bea71df905acc66faca23647686e5fd8cfa9405ed42b394. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NOXCW9500409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8be5b88f5fce82e1bf57d3ec00ae87e44bf226b36d0704b877900dac329d5d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:20:35Z), 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/NOXCW9500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558e794b8a3d42e33a21265d397f4fde00b3a080e2457be2b3d3d0242d4dce9f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/NOXCW9500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e348d3d509488820bdcd03c0197348fd7fa85c9b21657328371ab4e6f9d10e9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:39Z), 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/NOXCW9500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee1e506fe36e7430da60401f6c2a2ee89af96879c74431150d3c60847f8d6cc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:50:49Z), 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/NOXCW9500413.