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 0xb1ba87e4c27025a15eac9e2a6a4d7a3cc4650912b0ab93841fde0d44edd48afd. 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/e94394ca-a0d8-4c32-817d-d03c1540f893.json and https://artists.proofprofile.net/proofs/artist/e94394ca-a0d8-4c32-817d-d03c1540f893.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 0x1adc6c4d83e0d7296df4020ad47ac5244a6bbd8b5d906768ff0d59ab642b73de. 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/USMH92345458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87bfb8329d53ffc222986f8106044e6d8e6cd6d5a59bc77b9c71d9192717eb6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USMH92345459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ceaff57caa0c4efddb37c918eea5c774ce76752f40b160c788384304881fb0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USMH92345461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be9d6fd4b4eb79ef209af7553ca3b9d70edc2a8ea8a5f6e56e3b252fae02faa. 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/USMH92345462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3727dc532f5731eaec71cf6d9aff50c2adac5c21eafa99df53de0a3b3accd8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USMH92345463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48f1178827646a278d77714b16d534296a05f1d696204fbf89dd79f222993be. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USMH92345464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7c57614affd387bc87ccaed97e006b90c67c97250ff0ed746fe0bace80d744. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USMH92345465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bae6f3471215629b792236401d6b37282ab3d0fff8262c4f1f725e58070767. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USMH92345466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cc195d49540c9453adfbddb8d40c6e33f71137337e8f71326b0a4da41f1dcc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USMH92345467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015f9b357ebaa44c3c869c34af981e56d62425924bfb7d0cf8e2411a6f5257f7. 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/USMH92345468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118dc4bfe17a64d870027615ae59768ede8ea07dc0f07267f740ca9fde6e1d57. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USMH92345469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cfb178c66f66cf1844250ae33acd8b2ba17e4ccfb91162efeb4e825a7ef312. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USMH92345470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde443b3172cfb1390d83bf96e916d20594666e9b81312c6e4f2d7d3bdff0c962. 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/USMH92345471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8519a5962d5d1c17a5f8377f80fe9d66295576637b838bcfbef25654902cf88b. 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/USMH92345472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a02f7771faf4124dfea7b64b22e2bf491f2320024587f0a7bfc42be114dc4f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USMH92345473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eba10963d8860df24a58622fff18486a80ad9fc5f8d149c00ee8e6cddc710c3. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/USMH92345474.
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