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 0x963a0458766c7ffbdac132f6a1d6c89014aab49ce44d9954c13f1fa111841382. 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/7175ab90-54fd-46b3-9865-d76fca4e88b4.json and https://artists.proofprofile.net/proofs/artist/7175ab90-54fd-46b3-9865-d76fca4e88b4.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 0x661d8881671b6d47fe501d1814b1150631f1d6e7bfa82fa9f52127d1baed955b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAT2133281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe55242b278c3d318a5d4168deb1d7bbccb72e130efc1bca5ceef9adb080270e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:07Z), 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/QZFZ32268345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bf81e0e25f12c206b47e4f1800ad2befe6e148d6288398dca2dc322f07f467. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:33Z), 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/QZDA52285969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea42a31278ccd289dac528706c7de0b0878c591276f18b6d3ceb0b4b8714bc27. 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/QZES62218438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb32b8efb7bc2d46560917dd4b22e8af7f0f30ffaa5f8c11b988a815df82d2a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN62294072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d8d8f3ccc0102a0de76d8bc5f6c9fceb0ca42124f8db36b2327ba84dfde04e. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QMF922350017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeadd244d63f6f82013cb3e92387d958c541c9722bf2d4fa1d297a5539f5ac9. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QMF922350018.