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 0x07adc6e675a6b8ee794daca022d879ff23135541194e9fb2c5bbc6ec252453cf. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c048ee02-0575-4ca8-bb58-163b511fdf16.json and https://artists.proofprofile.net/proofs/artist/c048ee02-0575-4ca8-bb58-163b511fdf16.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 0xe9aca67b3dcc7968d2762f9d491f8b6c1d54db3b9698ed2703c7c5b939b1acec. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ATZ242101463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3db7aa9861b604f3ff38211e5ae692723644fcc40512cbdf6184b89f80a1df6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ATZ242201313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce176cefe1480a13dc5c07e062b30245318e358a5b9d807a7c5d430af1dd629. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:35:54Z), 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/ATZ242301403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2582389b3d57b5c4641971dc0be1f3c2adeaf1c7410b50381f0767ee6e7ae5f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ATZ242301418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371a443658dd9374ea6d7fe9b2c1a87319f7a053112036306f482814ba2d4ec8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATZ242401519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe18ba4635077b679fc0849d18beb4059397b30720fd15a793b000ac5f9820c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATZ242501603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0df063cabd69b9ba583f7e723d51cb0c6e1bf309ac1db40b4e40e889f32b1. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ATZ242501620.