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 0xccf8e223c0b7c874458b5c1456f1c2e375dc0b9a36a150846362f7c787e12cbd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a303f7c6-5009-4ab7-8178-f1b0e789f54e.json and https://artists.proofprofile.net/proofs/artist/a303f7c6-5009-4ab7-8178-f1b0e789f54e.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 0x4a66823bafba2ab127825dede390b7e847c54a31a448e34e40def125bbe9d0ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITD560201339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdede3b68a276b3cc371169033a928502503b977bb1302daab87eb8b2ad40fd2d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:00Z), 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/ITD560201347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c7ddfc5d3b0664e3ff83e9f798e27d72a35722b06be2794a11482f4f9343c2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:23:06Z), 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/ITD560201349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10860cb3460b8257387626e7e840b58e535b54070f3147d61d568a257d5909d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USI4R0602862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8aed72ea782d7a55a715fbc031a43c872bd2e95d83176d3231f4b6523016bd1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:38Z), 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/ITC950500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a524b54c675223d967e68b18197354974074825f51581ba204637b32d9b46b. 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/USBKY0512549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6cd1a8432dd5658a1d46d535e6f8ca826ea583158e9a3b043d23c763c90e96. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USBKY0512555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a46d5286bb77a428476bdf2d01a364d81695470573b78159dcead6c73dbd2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:53:54Z), 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/CH0040600660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cc2b0763fd1d97d3af0e5108483a55b7235332d5133337d5ca8c8309089145. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CH0040600720.