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 0x2ccdd394ee705d6c72027a855e516ed71c5aada7ab763837fdb5a08bdd670ebc. 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/b945f623-4f2e-4ba8-9528-27e221b4f477.json and https://artists.proofprofile.net/proofs/artist/b945f623-4f2e-4ba8-9528-27e221b4f477.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 0x557495283e4553a4a803e5e4da2df47b690221ba30a42fdc2bf98a118f8d746f. 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/TCJPQ2137493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b207e9eac90823cbca97fec102df936d6d146fb3b82c1e16c4dc73a5b7cf179. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:11Z), 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/TCJPQ2137495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b62266f078d2be5ef0326102ba392dc2a0aaedd54538c412c13f37effa2fa3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPR2218686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe898e7ff1adff9c7083eea66059ea121e92e6b3e47c09cb965049aef67103e5c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:00:36Z), 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/JPS752400387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cd7effaed843465e739e2b5ed2501dd99883ceec740c873e41c6762e9b51c3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:47Z), 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/JPS752400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07613d7cf0237decf3aa8c238e6fff220f5a4a2db213cd702fa217cf2b5ee0da. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:48Z), 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/JPS752400389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207d6320153193e165836bc7874680f6271e31f085498197a4d3130a9edd3bd6. 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/TCJPF2557731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1ac818b30bbc5bfe6d5f66316c80df954a7ce3fb7ca62d9d251cda75b769d5. 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/TCJPG2522471.