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 0xc28895df3e698a9801c75bf19d215b5c10345b4a70994229d0c31096a09c83b9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75e1bcb7-3b96-41e3-bb92-76b486946c11.json and https://artists.proofprofile.net/proofs/artist/75e1bcb7-3b96-41e3-bb92-76b486946c11.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 0x9816027c1bad32f4b656a4cae5e935be453aed6f963f80173e576dc88ea1f144. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:32Z), 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/USHM21742731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4473f0f34b66407db329b72a29513a5c1ed938e9a4c97d179978e08dcafa288f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:24Z), 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/USHM21742734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeb3cf40d8056e57e9de27c99e34bd5592d48ad26164501e87e65585f0c614e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM21742735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039f3aad0baa32ed233b5622ee57cfdece9a38141daef8bcc0064b794a5c803. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USHM21742736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aae86fc5cabb3a6101e57beba5ca7043d7971c2245df99850fe59d551eb152. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM21742737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1311ca78eddc0b500c17622bca6865c02fe9bc7807f65d22c0c6bd7da494edfe. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USHM21742739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32719738417f64db01593ca147a681145fbe502a32b04e1fd340e1640d3a97a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:03:11Z), 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/USHM21742740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6938700420a5a6ce8f530dc64c31c649b6e1d40344f47b6211fd106998cee010. 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/USHM21742741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5b0e40a6e956afe52c8968d96e17cca7320fc43829b91d02ea496f8ff8cd54. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM21742742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eae9d8d52e562d6878db92eba9e7ddf1506b9ca01c76d2974c9d5609a317101. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:21:28Z), 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/USHM91873984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605491c34dfef1f4d5bdb18d0fc4675834e5a8a921fe80ba18bef70821bc2057. 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/USHM91873985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4148fc15c89e0a8ba6656b44054bbde294fcc6b8567d837bc7d94dd96922014. 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/USHM91873986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f4ecb3cf5e0daae6c465a2f2c4e551d8c48a887e9e3faf96f04c25b3f107a2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM91873990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5160e1b71a03af57ee9bd0a7491678b1c59f5040e3637650d9650e528236b2be. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM91873991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f7a1f1d068bd16fb38a6a5890cf8f9ad5324069f9343184d347cdc22f47b7c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM91873992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fff02c388d2d466d9786177f7cffee9a39e0201990c8f32a82e71d4ebe9b677. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM91873993.