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 0xc563972470ff9dd864f09baf15d6cfec59a60076cae01ed14714ede3d752f0eb. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3ebdce6-4417-4f43-af6e-798c5f24e125.json and https://artists.proofprofile.net/proofs/artist/e3ebdce6-4417-4f43-af6e-798c5f24e125.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 0x7cbde09a98f5b9edbf443ca6512768eaaa9d5395dfff1c2c16b925d4f45f4533. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2453986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb340d90770b31077e55fac906d23fcd89d6d2b125250325b40d40297d1d0d59d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USL4R2453988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72fefe6222823fb4430426f075079b8dca93f97db64934eaeab900daf48625e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USX9P2443670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5854abe2588a584c766bfca7c135329a4c7aa16bffc6181eec304e6ec96849. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:35Z), 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/USCGH2540764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dcd02123c3e5f15c8248e28714504853b3f68a7e84bd39f1d63a07b192b3c7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:23Z), 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/USDY42523195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6845cd89f000acf875b4030daf9c92d2830521268913902937443d836c3637b. 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/USDY42545689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76572ed4a8ca6f5dc58d3aa1c31babff0a6684b3860d076ec4331d9c35e7a5f2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM22544588.