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 0x326bb5948292fff65df3520b3f2e0878c3edd0915185d246f65650bc27727bb2. 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/df2df85b-d030-413b-af12-63032210d6b7.json and https://artists.proofprofile.net/proofs/artist/df2df85b-d030-413b-af12-63032210d6b7.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 0x0ac6d30071e4d3af88f847b9828b901e3408b1d1d84085adcb5029cbbcbdab79. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:28Z), 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/USHM91681352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374d2be9c9df8534d8ec45e714c8cb77d7fb0015219eb1cbc0140d28bfded697. 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/USCGJ1777700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa194f0265a9c0d6b602e4713fcff0d623489a1a8055e5267925829909e7dded1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:55:57Z), 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/QZK6M2026473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf3f888fa0ad94d06773cf39c4127e254c7be1d6ada92b2695ae5cc80343074. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCADK1704380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23298c94a776a4c252cd792778098f197cc08b98b02f0691a2190d43d9d9d8cf. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:09Z), 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/BEGR11800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6b23704cab9d5c640fafcbe3c133b46618756bd71d2d366d3083597d38af96. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BEGR11900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0fc42a4ea171542053ccc668d7f253d1228ec7e9caae8f500d067d5b0edc64. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/BEGR11900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a99c37f97a3232d88072924de7336c4f13865d06295d9c94109cc7a679f004. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BEGR12000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff92650dfdebde6c89358b947af4af02e6ff112d7edd83c0534f972ec1b08be. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BEGR12100002.