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 0x67c95ee77b04f48cbdfdd2921d29d9c017793b2edcf1f7b596fb283c2c100aae. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c27fe040-6b7e-4f38-b9e5-e6aad1de9c3c.json and https://artists.proofprofile.net/proofs/artist/c27fe040-6b7e-4f38-b9e5-e6aad1de9c3c.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 0x4e94600d64ccdca7862f4f8c6f27cbe3992d8de867cc377d110809bae19b09ed. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:58:00Z), 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/DGA0M2340657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed94ca3e77f7dd3229df82d5b751852774572978e36718cb552a35b540018cc2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0P2353516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65d882a88eb2ef9270319802bdf2b30977e966cee49cece6aa5e30338734ad8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0P2353517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c7384bc55fb3ce77fecb043e1ea2d9d1bcc17ae0297b0f8daf1d2f48d850c1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DGA0P2354552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe014a06f6b51d87724acd5b82c000dcfa5f8009bc843b529d5dd59ed1fddf852. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:02:30Z), 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/DGA0R2319532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3ee5be2c776dcfa60b22cd519c91366ec002cc86894fcd571c6586f3032e1c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA0R2319630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2e2ef4c3ca3a136dd51485037276e899a6b54a5b2d202bf43bfacc16ffdde7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX282429978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dafac37cba04e24d4f84b4d1f66ba649e3ad9db1b79fceff30a789b0ca9245f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:37Z), 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/DGA0M2437284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01cd5950ace0b9d556320264b7653d938428c7b883cd38c38376286cea66a64. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA0R2409750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f0735eeede3a650fcc422d46bdc25fbc66e76602349927d1a99e3f46f782d. 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/HKD012677722.