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 0x0d44272e1c9042f82319c56e07ae43d66ec56d47096ece21e41bb1145d9127f4. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e027604-8375-49ee-8ea9-60ea111e5d0c.json and https://artists.proofprofile.net/proofs/artist/7e027604-8375-49ee-8ea9-60ea111e5d0c.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 0x02e0c8b1057594e855e1ad8b229af80cbb153df3d39621a8a8525259f5686564. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNF182200691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9fe2f402641be6f30232ab9f777d2c9634c2b56c95b17e76ee5e4430da22f9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CNF182001699.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d361ad8fabbd69ebeacebd0ff5523c9d65180d4967e99bf46052dac8d9f2e0. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CNF182200700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d6d595ef7819ef0b5781870357211d36d39b67f57a422a6e87dac0a2f49bea. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CNF181902459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f546745503aaaf84293c672ebdaf0607d5b88dcac061f10c965eaf8d918754. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CNF182200689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e83edc6c89815cdf720c627fad39c6d981f9033461cbcaa9d8e73aeb8cda827. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CNF182200688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c00213b3a6946c12a52fd385bdb15ef7ea55ffe0918da0c7b0702b6d32c53. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX762314376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c823756103a37d058d036b260dcc021524d1e05cea4991da4df075d66e91b3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CNF181700161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84edf2ee2c60ae89328cd3293359466c715207d41a871ebe69bbf8bd1245278. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX762314383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e88aa2a980a60ac2fd6491471d5f189e82ef0cd0ce9d2ff58f9a7b5b3f485b9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX762314378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5ef688411d08831df6cdd41ef41e3cea0c9f1f05c77d37e6257a91f579c9bf. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX762314387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b189b6b9b9d0461e6dccdab5af90ff5fea12f48581326f0689b58ff7c6ffe5. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FRX762314388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf7accc74b511036962774f6684bc6a524869438974925e9e2dfc07e29124a6. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FRX762314389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd9f3c48e5e0d05938458fd8085fbfbf9a343b01a820dd5a277182ee6c06d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX762314326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c63b6966aa57dfe508b695dde9b91e68ed49daf401735744eef9891dd18bb3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX762314330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7312dffae7032f833ebf0dc6ee05a50d1d039fd413f3b7cf452e928e595257bf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX762314339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504ee6c76fde485db5683ac6fd45472f6c20c91970545315cd826a877fbf4955. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX762314340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3f8e91aa0e9c8be6fcdbbe3be80093c80499626785e1cdbb679550190235b2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRX762314327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc4575b5e6a155d483eb867e0e9c84a4b42d600b6ed25d84281798a8cfc3d42. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX762314333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ba74a55a9a1e51f1d9a485d014a6989b0f6a67604e08d2beed846bc008a90f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX762314335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4bd8d2e0e38cb6e6315bc1202311a73eb2c863a89d8ce006504b5375574caa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYUS12223196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0e87787a1a63d552359eadd4e67bdd0ecabcc9d4e6de5e330cfce5ac95f62b. 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/QZZ972333486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde6d19e73f6140e0168ca7586175e5c2f9d76b2be337d0d713ba8f721d76fe. 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/QZZ972333516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc604203f324962429de3bd02d538530932e1a9e41b92323c2393c4f496646fb5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNF181300883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb00a011bece9f86a2ff18d1fcacce902fbdca47853210416c5ac3279656f26. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CNF181401072.