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 0x6adfed545892c9cb3de80c0d7bd34630aabc8b091d1a9e4910df66817815e6b2. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd00405e-275e-4a24-ba70-0ca87a428819.json and https://artists.proofprofile.net/proofs/artist/fd00405e-275e-4a24-ba70-0ca87a428819.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 0xe2053318ce4f49ef556096ca9f2e7ab420fd6d0128ade01fbc31d2694fe92c7d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/US3DF2222191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2652e1fc82088695e136bf5ca65afd9e24a8e6afe5e65ad441b9066850266e08. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:42:06Z), 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/US3DF2222192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5683c0968879ea39ad29c9e7bd196ed699f3195d9fac29692a1760e8dc28b081. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US3DF2222193.
Pot-Pourri - Mar de Doçura / A Vontade Que Eu Tenho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22151fdef53c6f9a41a533eb786f4a18a8c1ddae5b047f11d7705c9df6807f30. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:51:23Z), 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/US3DF2222195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675e11170231c9ccf445c3c580da616e14125c54437aee2a4c26d9c6ab87638e. 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/US3DF2222202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c72dcf075a52af6c53f33d49ddf81da1627067ed6161a2952ca55d6dd1bfd29. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/US3DF2222203.