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 0x087cd5e54c0d37a221c1baa6808976a6cf037f9e49d43e969303a1ff35e57eeb. 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/ad07a305-2416-4cb5-b5e3-68adfda101e8.json and https://artists.proofprofile.net/proofs/artist/ad07a305-2416-4cb5-b5e3-68adfda101e8.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 0x9e60ba523818399da893996965a3d13d096fed5019cf5333c550a5787c97305a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDPK1500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2820b4a4ce049ff3a4425eb3372e9d63c823284a9df046a876707f5d2575f5fd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:04Z), 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/USDPK1500184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e71cf638965887617011628c575a66ac7405c852ca0d2115a8fe19a82803bd2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USDPK1500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46905a8b4b8dd5b54faf3f9a203c314b5954018af97de8c92056760b9745ad88. 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/USDPK1500187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28495400257e7231844d03bc6213cf4937f7493464dbd2e3b5f6c89e301c64da. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:22:15Z), 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/USDPK1500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a84fc1a89b2454630b81d8fba4364aba5076a4d1333cf6c14e984a099e66f9f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:24:21Z), 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/QZHN82000998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d54e917849ee425d7fd1b54930b534b4d2d1040f9b27126dea9d923315a5aa8. 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/GBKPL2034750.