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 0xc629b6d553ea12bbf071f718c7abde43990d63ef89d604349be754380b737132. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b725cda0-9a10-4b8c-9c70-c53e178f9390.json and https://artists.proofprofile.net/proofs/artist/b725cda0-9a10-4b8c-9c70-c53e178f9390.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 0x92150f4da22245c59a946cebb14a0b4128fa67db5b12fa0d6b8f10ebaedb7f69. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QMAAK2225973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf633b783d2d3692a9380fc4c58fa63b7c1afbaf65030cab51c6d92cc5bd5f7e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:38Z), 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/QMAAK2225978.
Talking To You (is Like Talking To Myself)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf726af165e14bfa1883778f34e26eb19caf2654f9a450948cef05e77c1d8a720. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ITFKD2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b2f4245e72ee8564dfa1d1ced58617ea3a42dff07730d7336e45b17a14b82f. 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/ITFKD2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8281900446656504bec7ffc0a7a884c344447a35005539e1e6ebba9b046bb91e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:04:30Z), 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/ITFKD2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfb3a895fbd7bf55da5b84601a02640208c47ab02321278ffac76807b4ea24f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ITFKD2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4966a73bde23c57fe8287f5febf20d20b22d3f769dba87f2b257c5d7adc40c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ITFKD2500034.