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 0xedcf5851f6f272d51f58e888fcfa70755897a73a5ac32c9fa5ef6ab65b722336. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fb078bd-d22a-431b-9199-708d05d4eb37.json and https://artists.proofprofile.net/proofs/artist/4fb078bd-d22a-431b-9199-708d05d4eb37.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 0x149b84fb5c2911ae036e9e19ee910e0b8e41ea080f375789f2c6fc1eaf68c611. 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/USHEL0323103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099101a855c00ef2bdbb33d8825975380ea309fa5f82f5407283648c58dd8b99. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USHEL0323114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149b84fb5c2911ae036e9e19ee910e0b8e41ea080f375789f2c6fc1eaf68c611. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHEL0323103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099101a855c00ef2bdbb33d8825975380ea309fa5f82f5407283648c58dd8b99. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHEL0323114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51fe5af869f7994a33931fd2d94c49a4744c7bbe535af7f62b3f0659266f50d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHEL0406102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030eb42627fad4f06473e4a4ad31ef4bec475f3b6bc0a5c6aa05ef5a8dcbf1db. 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/GBDHC1122405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901c4e6d3f16b8693080b3d92ad0845d8badd080c439d01042b0a0ffaab97f36. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:51:14Z), 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/GBDHC1122411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149b84fb5c2911ae036e9e19ee910e0b8e41ea080f375789f2c6fc1eaf68c611. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHEL0323103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee12baae5953c2a72e7b922ab31bf4c5b484e3b2ab2f451102ed9659e358851. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHEL0406115.