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 0x177830200245a5996f3d54bbac76b89def993caf478f11ade8dcde379320397a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c940127-23f0-4d8d-9221-b33d5cc5daf6.json and https://artists.proofprofile.net/proofs/artist/9c940127-23f0-4d8d-9221-b33d5cc5daf6.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 0x925662015143fbddd9b252d3b08fe85a284f6baefe53fb708c8b252f29c5483f. 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/FR10S1989626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c189f3d6c4543f97aac9ad27227bb5be67324d5ff31c94fc57fb4855ab5566e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:42:57Z), 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/FR96X1873064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76748e60b9360ca7be9cd0e07adbc785f341639474069040b609d94e498f3eb2. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/DGA0L2343716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d55fe1657d0d7514cc622c52076a27fbced844da11f4d1d57231ab8e9b99ff4. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZ3TZ0800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3be00280bf9a2f3c398c4b4a570c48675c6edaf4becf6d0f23a73fb71a30770. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:12:51Z), 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/QZ3TZ0800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e09cd6896f9b631676457fdb5314cef220b9e08354c766906ae415a0c78741. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR6V82527264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef880279584a67efc9e6720dde8030d10c9df755e4f5962c077a599809519725. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR6V82527265.