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 0x1d61d07425d7aba4af5dd03123f08f21546eeb704ceeb8d8c5377dafe86096e4. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a670efe1-4833-413b-b36c-0f9133b1288d.json and https://artists.proofprofile.net/proofs/artist/a670efe1-4833-413b-b36c-0f9133b1288d.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 0x86252161262605ed11a8c37bbe764c647e80e4068e09e61e5c865bbecd82d2dd. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:15:44Z), 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/QZRP52207586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63db48f68045f98751d3bdd1002912b989f1916c0c99f81b42cf4a32dc76f82. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:42:48Z), 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/QZDA82429056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bf6cf6078d47d13c452f410de8dc85f90877ff574d85d9ce60773ee40760f0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6Q2464507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aa2dca2b0159f2a032d8650b87b7b17ecad98201af3c2619f802ed035f7289. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAY2575858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca35cbd7c0f14bb6742af0f84f163f3ab7503de6cdd19c186b5b49c5e0f66ef1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJZ2470785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b4a08bc7f30477e9f682ac3df52ec67e0110e2c83a8fa0d0582ae5c43be572. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:32:38Z), 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/GBRKQ2548339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626e7dedaf0b9891bfac6d394cb7a1da040ec4c2d29af40592a5dfb89ff6d7b3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7L2565167.