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 0xa6bb5118b2dedf069b62cd8854ad5193030bd71a58ef2217f856dfd398f9a2c7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79cec94f-a033-4fb1-ade3-ea4dae613e84.json and https://artists.proofprofile.net/proofs/artist/79cec94f-a033-4fb1-ade3-ea4dae613e84.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 0x149fe788ee0d11a49ab50ed0957314ad5c53291a1c2a997d619ad8af055c22cf. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:03:44Z), 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/TCAIE2474918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c00262f5db6d5e006ed5090ad438b05d6063affd07603211467d23eeb60605. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:34:00Z), 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/TCAIJ2409035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17bd6448a9205bd3658eadd9a49d6e06fe4c2ed0e6ea1dcf7f88e6ffb15e4c3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:33:04Z), 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/TCAJA2441043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6164415daf3608ea79d61af6a81925a963a55153e3c17e0d270bc2899f17e7a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:46:27Z), 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/TCAJM2569325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c4ccc518d3b1d48c8ed2c71a1369e4f9bf6dc465b26a98cc4b0f4ce2b37f33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES72326344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66792ada8c99c1793972ea83c8b5c893a0055bb2433dcd21e75697e47fe99946. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IT2J82300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc845f9d20bbcf42b53bc3f133fc98a30b0a952d45b90a2b294884d157b415592. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IT2J82300030.