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 0x176cc3360d0a0fe9479e2016e80caf8115dffc271328e38920247e07ee18e3f7. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b89beb8-593b-42ce-a506-4ef8d14e9d9c.json and https://artists.proofprofile.net/proofs/artist/4b89beb8-593b-42ce-a506-4ef8d14e9d9c.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 0xf9270f431f83e99901a3478a6ec1efe1272932313a902aef03d1adc727f1e263. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM91771152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b9212dc7e84a6b9ffa86ae40bcf7c0f7b32f7e13b5a57639fd2d62b09ed83c. 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/USCGJ1807281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7628651b5a6a3bace4759ef4bff7e2f32747d523bb7f5fd3af806c3e9aebd2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM81895629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468f1399fa7d26063779ab52ffa28a4b0bdff7a0083d1b3601b9633224f3c616. 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/SE5BU1967495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6accf819b4bc0fd52e232e3683c789a5fcf1b681205413695cddb9d427388485. 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/MXF012100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6677c776ebed5f8fc12f53577a2b51ead03abf9dd546a7275229ad17eb7e9de. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:12:32Z), 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/MXF012100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea6aabf0ace40b291c49b4e705ecf96201de3a428acd050e10361480b79a435. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:03:34Z), 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/USHM92161369.