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 0x2ba060311f2f919a75777c0fc3bc159bea54d90181509817940a76699a125440. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2db0aafe-9dbb-4d5a-9479-e708a0cb7c2c.json and https://artists.proofprofile.net/proofs/artist/2db0aafe-9dbb-4d5a-9479-e708a0cb7c2c.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 0xc32cf07d57941170f5222ab128883387db1ea1f38f10ac7eaf0b5cb5a45d39c5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZ5FN2418382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf62bca3b15bc379769f661a838da6edccc9de8623faa06e79733c52520c88b. 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/QZ5FN2418390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabee97f33944be84632fb546ce5dba2e4363a0da9fb4d3b98fe789f110d4d93e. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:57:26Z), 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/QZ5FN2418395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870726384d26b075fadce7d4dd4ab34693fa9cf78b33563f162f282f5436db46. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ5FN2418411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbad6d0b57c1867d160b263889b5a9ff27eb6257a8efb43d0dfb84b0e2d123d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ5FN2418416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4889e51e6860018ba27ea079630f0e8eeb8bd59ab41bc73ca85505b1d52431fe. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZZEB2479469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f81575ffb76aad8f60ede95b575d8a37a9425554d9ed1c57f65fadba098f373. 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/QZZEB2479531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab8e92b5e11cfca437fc746f7a7ec6a7013ce4bbb87f1ec449e232c9855fc68. 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/QZZEB2479558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e05dc2983697801da238931a1e82298c56371e33a7bd8d5dc516e812d974abb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:43Z), 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/QZZEB2479562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b17c76ffb85f7b69d80c3e3ac2cc13fa71bb49a3ba7452bf1c4d7872ef5fd1. 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/QZZEB2479567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bac79c3cef709a50816147d80cc04d692e9c8a4c0bcc18d84d741cc3bbbc635. 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/QZZEB2479578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251a8e5bc0b73326c58c15bda63d9c39758ffe20d3dc4967c1b5ba0bcd1ce35c. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:05:44Z), 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/QZZEB2479586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5dd86e644a06a2ee72c8bc632a8a61bf38ff6aec828d63571469a17cf038e9. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZZEB2479587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae62e5c169d2d700a5347bd2ca250b35cc4f4a4c277a3145edd2797c532a71fb. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:54Z), 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/QZWDD2516480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117106b336e51fae20544af273d37ce558b8dafc51566afa78c759dc65805771. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWDD2516481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56514caf2f5e64fca7552781e068ae856e1f4ebcac13216f4c5ac18202ee80b4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:03:53Z), 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/QZWDD2516485.