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 0xa58740a34cf020b4115cc38419cd0487d9ac8a0c0438f174c93d4b1348ddfa64. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/724b93c6-0333-4a1e-928e-736d67ac6f02.json and https://artists.proofprofile.net/proofs/artist/724b93c6-0333-4a1e-928e-736d67ac6f02.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 0x77875c0374cae67c8d4050c97ecf6a524558ab84305257d777eec036718c3670. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2355170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b3459aa49f6a310e031d5c36769a233ab5956f8b25a5cee4978a88ff0fe2e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTVM2270748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5022f7b8eaf5a074c4eb8310c7614133a2d9d32b1f9340f37595ae53dc47d50d. 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/QZGLS2456288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a55db3bad812a95e87b7a06b3ac4cba1d288a477733d5ce5ed2f60050b42b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLS2456289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6805586662367a9302c533644dee3072b72929683f76ed27657375d9734954. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2456290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab0addc5919a261b7f6da5ce9db456dc40f4ac2ad1a88bce38ed34316841d4a. 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/QZGLS2456292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5da41ddac1c6f5d1b237c9f53fea57c4f9a542c5526fa47ab888a47024e4d8. 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/QZGLS2456293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b413d6f17e722b1ac8dcba061f5cdcb9a5cefe96fcc9f9beb5a962d34db03ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLS2456294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1c082d2ee861e1f7c79a39d66fcef943d7e575712fb05aa8b3ec0c9344e9b4. 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/QZGLS2456296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5022f7b8eaf5a074c4eb8310c7614133a2d9d32b1f9340f37595ae53dc47d50d. 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/QZGLS2456288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a55db3bad812a95e87b7a06b3ac4cba1d288a477733d5ce5ed2f60050b42b2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZGLS2456289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b413d6f17e722b1ac8dcba061f5cdcb9a5cefe96fcc9f9beb5a962d34db03ed. 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/QZGLS2456294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ee42092b5d2972bbfeecdf260acbb89bec14e8e627ccf7636ff439f7fc9388. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2331254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2712af05ecc26ba77986782466479068b18671353923b72e2122c95b78984115. 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/QZMZ92377379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e00a33834e18c444423f953df904cdc7094cbc168c39b8659c19d5276d5104b. 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/QZNJY2206764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7151109c469feed3748b9596dbfc8af703e0bf1aac189da0adf4c76d49bddbd5. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZHZ52228324.