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 0x441ffb7f6412ff59d6deb76c4a361a29ac6d4f87aafc27d5a7572f18f29fb573. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c85b827-3e4d-4d00-aadb-1f37a65b8dd0.json and https://artists.proofprofile.net/proofs/artist/6c85b827-3e4d-4d00-aadb-1f37a65b8dd0.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 0x9e0e054b295f97bdb97d95a56289826bdc36b343fa257ca7801ea2699012fade. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZK6L2535137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e25a8b4908b841718a0f62eec8850285e25cf5faa025f4e68e267e6ec049f7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:21:27Z), 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/QZK6N2574243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a6b8fdc916897fff7e0cdb2bd2aa0da6e72bad607a4f77f06a807c6e2c3834. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:20:09Z), 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/QZK6N2569955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b0fd60b7c98f81629975296e1bc0e320d4affc038e05589fa583719a456fe0. 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/QZWFT2429979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7888b77e97625deed68176440352fbade64f0b8c0757cecabfe58b521726bdfd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:41Z), 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/QZWFW2421468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc42b02c9a5af5ee1c7555683b5f233fe080a80f99f631bea4bdd6995fbc61f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:44Z), 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/QZWFW2447408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e70896c5ff3b79ca0a67a2348680ee87524dde5131df09055168b03bf81b63. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QT3EZ2428342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f91b5989cec8351e880c193c62e2533c0ab29be2e5e57bc05152170c4dbb2f9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F22450929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e0924f9f32908df5bae94bd913d4d537f1fc6a461f7d6e81537a770d37562c. 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/QZHNC2501226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ee45549d3ead000097a8b8d08f6b20b2cfaeb2be1095ed43ff2aca794f79da. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHNC2553190.