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 0x4f9f6b6d71ab8687b5259a5549706c88a87ae117008d219ecc6a74f44141edd3. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2f14b18-4e4b-4e37-af70-d9f7bcd96e71.json and https://artists.proofprofile.net/proofs/artist/e2f14b18-4e4b-4e37-af70-d9f7bcd96e71.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 0xea85105ed988e52287e52c1613afdc54d9e028e0463990f38205e0268b400ba5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA2B2060860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d93561189d446f64905cf24a4a208d8308ab0db15cd12230cb8d1bb5a0edb8. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:37:29Z), 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/USA2B2060861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86f5780369d7075a1df99e2e112c33cfc9a0f250b56af9d639a34528160307f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:46Z), 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/USA2B2060863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6affc248120b48ce6e35e0c5669a78100a52255bfdf6278ff857353cdb0fcefb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA2B2060866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7950b8438c05e98b904e604b2644dab874f9c80dd465b8d554ba5547e9de1. 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/USA2B2060870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef466a308f3ef415ecede0e4b320b9545287e4b179029463a8872825b6357c5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA2B2403859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307c4979d831d1b5ba5e0921ccac4197fed903357c5dfae7060bde400775d989. 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/USA2B2403860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f480fee3a3aadd5e9b1ab9d72e1d00d701ce9b50c8d15341a9730c58b844eed. 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/USA2B2403861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3424344b765ea5309f1913544e333a86d588e9a59b2c26590136b5964a48a6b5. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USA2B2403862.