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 0xeec048560cac1c317cc5c6851e530d5f1f72d9d82f29fe5479a22333adc78d84. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b852f58b-e699-4b53-9aa2-de01755c2c18.json and https://artists.proofprofile.net/proofs/artist/b852f58b-e699-4b53-9aa2-de01755c2c18.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 0xaff44be0ee81738ef17453d2d31d388e418a961b36ceb05626bbd4674af993e5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:24Z), 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/USASN0902037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb6bb552e904eb22f19db0fc60b0966bd9b77e5f987f4df43e539301cff1a94. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USASN0902038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a81bd1522d7d1ee67e416e1983a280318151436731000fb54d1fd7fd714094. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USASN0902045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf207b3d202581b248237a280b2e5c4a874ff1243f4c6bb909adc35660418a7c3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:17:01Z), 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/USASN1400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eca6a03894d769419dd53ddb8781fa3175af255a270e7e79f58dce198723b90. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:18:39Z), 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/USASN1400994.