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 0xf02ab6eb97c2381d08861d168de8469c8569e438e00657f5ac69a914e92a2d02. 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/6ed178bc-0876-496d-a448-c6cf214725f1.json and https://artists.proofprofile.net/proofs/artist/6ed178bc-0876-496d-a448-c6cf214725f1.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 0x1d3100038f56958105ca0a9be776ad37c4df0fe4e90642e9174adcbf63be7cac. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:20:50Z), 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/QZTPX2112588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e19ace43793fd2fcd24cf843afd6deaf5759968c21af4c6685ab5c0c66e270. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:40Z), 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/QZWDD2257540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ad26d2629bbd0cd2203687dda56e4cbb54b15a778630d1045d435720924859. 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/USLZJ2466275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cbab7382c2073137c8653486f3c00d282fa692e30780a54da91e45210ca482. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QM4TX2506437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d5f5931bf35303cdf9e339c119a32aff3a2dcc794750db08d03d95180b65e0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6N22570276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273533cfc9586e15ee6b7e679d262c35b4673ea2f181114f020c89cac30bda30. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:55Z), 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/QM7282590297.