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 0xf1abd76b4200893aaf7bb75cd67f4745befb07e9689551193920c1c10de20b02. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1361553a-a1a0-42ae-9292-ab4b19787b97.json and https://artists.proofprofile.net/proofs/artist/1361553a-a1a0-42ae-9292-ab4b19787b97.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 0x0593b6e034eed763e3ee6c37631d627670e7c00d5da8bcaa541ff237c407fb36. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:59:07Z), 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/TR1251401648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59976e33817f1091fe00daa22713adaa5924d0c63191a5fe0e85e9866749748. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:39:12Z), 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/TR1251401655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0593b6e034eed763e3ee6c37631d627670e7c00d5da8bcaa541ff237c407fb36. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:55Z), 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/TR1251401648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa89464d05174a66ab7740e1266538cbe8bb9672a3ea5db8f1aaf4ed323a4fd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR1251401649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9bc767ba0b63b04ea0f91901fb7f52fcb29c7d2194db38c5d2ad6cff1969e5. 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/TCAJY2581736.