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 0xf36e971cbd6bd0a1a9e14981a3ac0e65e74e686b3b34e708c39632ab4ea7e03c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44f38037-acf4-4dd6-b85b-9d4e560603ec.json and https://artists.proofprofile.net/proofs/artist/44f38037-acf4-4dd6-b85b-9d4e560603ec.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 0x8e8983aa38307a68dab4c55b4da9182bc46c107b76c89a9b095985f09cfb04ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK1862697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a7abd39f5b02286aae750a1cad52f3871d6838b04aba4a96893805078ec2e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMEZE2045474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9fa2434306e5a8209672408cc24e55eee55823a79d40aeb00caef947b68f06. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:24Z), 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/QMEZE2105569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7425f8ce07750365eeec61e26645e881b6580b3b29561a397b97a659abf093. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMEZE2109590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7458a8c8f6618a8e9413eadc12f8f26e8c5893c99bfcec20bc6b3c080fd92f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:21:17Z), 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/QMEZE2109592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708c8138fe8af3d5f30fc4730f8c8f7f878507cd7af06d7b95022da0a59aaee8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:27:05Z), 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/QMEZE2109593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128177ab61a1f10a30add7f03d9636d78b9cad7ebcee88727538eede59541e61. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMEZE1780893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1db159dca5571f2f2194975e3fb9251e940d2129e25f82f9f01c49f27a684b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:37:34Z), 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/QMBZ92447369.