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 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 0xaaa2d6317ee20947f645ee5caab45eb8efcf7fa2e507e1aa51666f4dceb39413. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa4c8ead-b019-42d1-a65c-b7694a54740d.json and https://artists.proofprofile.net/proofs/artist/aa4c8ead-b019-42d1-a65c-b7694a54740d.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 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 0x8c66e8f7284b645464ee07498d63e5e846562eae9a75525720ee82c40accf02f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEBL60760681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fe62678b936e117a3776101832adfc0776d57be1f5e96f295ed3f1eabb3e0f. 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/DEBL60760682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6d58ba4987909853b570cbf832a1b1812b9f0861eb34349e5211f2fb696736. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEBL60760683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b166d3226aed859cae8932117652ad659a8c1beaf6f5bd18318140a3da95b6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEBL60760684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42ed2dba1284fcdc525ba37c582ba1fa9c94fc9187c7c827cf0fd616ecd5eda. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEBL60760685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b02fa8355f0d83f87830e3a25a41f3a76f6e8e125a6dac7fe70ce3c5e10c761. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEBL60760687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf0ee400c29a43360f6ac3dbdf30b3df93f2482babc3f5f68b319684d1077c0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEBL60760688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d84f4891ed5c3c2f7cc8cf71054f414211b981da7ef9fd9db55a2e1ed728cef. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/DEBL60760691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a9353e19fdacee48e73daf0cdef0742dde83b0dc9057163bf04613be6595e1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEBL60760692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751f5108269812823baef4238e74d9cafcfb87808756557e33c0f44216a0ca16. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEBL60760695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b22c6101d67daf7a8acd71d3daa56b84f59a9714649bb2fda6112b9abe9a89. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/DEBL60760696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c21d46ee7927f0ec80abe4274929ce7fa74eba4e120cb0ca1868db04259b136. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEBL60760698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07527bbc1548f82fc67cf96522a5328e2f98ee41d3db103fe09c9f69b0e275b8. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DEBL60760701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac6227e854bf47eaba4fd7ad9b530b4c112ba27aea7460c178f7683646ce597. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEBL60760702.
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