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 0x66b77b1edcfa110eb8762b2c5db4069d8b79f7fc75ca4bf2654fe6a3922d0bcd. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/070b21c5-c315-4c5a-90bb-56114145715b.json and https://artists.proofprofile.net/proofs/artist/070b21c5-c315-4c5a-90bb-56114145715b.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 0xbf7b2fc7fad9ad151d2546525aea2ef30a509523c74e2669588a3d255e7d152e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBMA22540304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab485a453d4d0d9bce42fec97b5964e1b3712906bf87291508b28444ba17a50f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBMA22540305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f89f896d8ca0f077fdda564b3bd636f7a29337a757f188a341d38714f8b6ef8. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBMA22540306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fb98ff0fefc1829b67fe1656ce65e85aaa873033d47ec96d1cf8e157aa3835. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMA22540307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d8e4b689a1540caa9ee94aeffc88618b7b7bca8ca25a0e5f02ff13d4c78f3c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBMA22540308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35320460bca61e50164e2f406879248f8ba52c81a91121e0a84c34f46f0fadfe. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:35Z), 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/GBMA22540309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84c8693012cffd8bb302c4c41766f22511ab59269c28eaf82a54f5d736f65cf. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:15:09Z), 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/GBMA22540310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d4ef86b6ca12c8994590d7f7afcbae4515eba55c523fbf56dc3aa64d10161a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBMA22540311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5426656c4973776f82ea6400f77c061407164f80d1956d21d8dde1edda4ce8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22540312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782d1c15c0e039e04a4a712391f527952742e4c049f02d4a7c4685c6b9f12e40. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:46:30Z), 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/GBMA22540313.