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 0x0b574b15ad8e18929475f78f311cb65ca900d9c1ed7e36a8242ff1b0e7d9d4cd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96f7f850-d3ad-4d1b-94e3-165d33f35e38.json and https://artists.proofprofile.net/proofs/artist/96f7f850-d3ad-4d1b-94e3-165d33f35e38.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 0x8790be8ebc8096c2a6eb4961b6175140ba33d539eb5fda2d4bdcb97fae8e5e61. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:53:51Z), 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/USUYG1341777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3341fd508222d5d149dee9469f3202e3e2cfc1ef016e1ae10249d7c585546c7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNMV2167506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acde40e35ee851ab4da5383000a89c8466ef4308cb9f6d53fff116b1522200e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNMV2167510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ca74b878af7c3907ef77f0006b328171d98f9998cc09d8762076044cad9947. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNMV2167513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc389b2e49655d4b48b567c41b18bf5a18b51a0a00ea23ad35588ba4b728014. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMWW2116546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ead27a0d08ca8fc3ce72ef0ba9f8078bb78efcd5a78cd3409bd5818529a307. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:18:13Z), 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/QZNMW2267656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b1bfe928ec75de9d56a74951e62d7a938c1d1b541039707795bda4fce19177. 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/QZNMW2267660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89301f883386a9cba739a80d828020db801867ec2e2d5298ca427683c4386da. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:54Z), 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/QZNMW2267663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eb15b8161c6c213a5e0aa7fddcecc88687be6349f8ffc552c2263f5e81c315. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMWW2395009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ac82d758952ba06c6381cd3eb84f0c228b5aeba8b293815d8be3f06570ac13. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNB82328667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b2b73846550fd9cd9ded08bcfcbba24c54769c5f70473e1ec9bf683f57f6e1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNN22377217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf168b190eec98947be4e0472a5ab6482af538c85120ad15de289c92deec33148. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:54:24Z), 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/QZNMZ2453773.