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 0x3c33da0d13da336e81a2175893bf28907d67dd7f50a6277017f857fa34057f36. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4d74cb4-3a7b-4067-a657-348fdc0ecdc9.json and https://artists.proofprofile.net/proofs/artist/c4d74cb4-3a7b-4067-a657-348fdc0ecdc9.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 0xc4b58b320e39948a97afa4e53f200dd51f44bbcf0813e041cc7e144bef73cb0b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN71949375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d1180d81d3a0d3ee0abb21d97efdfd6f9f56cebedc7b2549b31d729e128905. 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/QZHN71949376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfec345672263eef7107033547ea2d680f3146efe131d1f40b295d08259d463. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:24Z), 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/QZHN71949377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc537a47ae47e07162f3c8dd5d568a13518593107449bb7a8d18a0ccca3dc089. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:38:20Z), 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/QZHN71949378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c160a0ba02767e9b82bbd0685a8bdd685fc16f68a0a70fa13a5a084df60f3d3. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN71949379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b29772ff86e7231db83089abd61bed903fb55fa0ca07ac0c8f244472367dc60. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZHN71949381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95e83db611f9c6bce407e3e64b88b47145ff2de47bf6e011961ccccff39e806. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES62175742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec137dce53fe379b846e455a760f5e0383c9dd414c6c8be6bed51d43b49b4a41. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:11:29Z), 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/QZES62175744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47e728ff53b3db92f14ccbd36c0d183f77c3008c0ddf96d8da06cf8cac9dd1. 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/QZES62175746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621ac3641ab3e0f210d2e161487d146b764f93cc642e403d0034a1aadf1a8764. 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/QZHN62211919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8219e179cf2c3e5523774b8d24cfd6f62f227e210cf3c1fcd008bb5c5ea5c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6N2243360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9283a2e294eabe9967d052d6aa4e55ee51ff34d45a3ac96fcc37871089c56983. 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/QZTB92220082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712eb9be1afe099ad90919dc53c10d377b872baceaefd05ae8a9d88e11335096. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB92220084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7033dbb1424bb8fc91d8ec8447cc47a5977981a7531af28042e5c8edebfbd9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLR2236017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3789138f1eb193709b2514c7e37ae8f09c08c7574fa4f4e8c9612092b33140a6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB92220086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a0029e8c14cf82a74ee12c5163d05c03124a80172b90c698250fe52b271f59. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB92220087.