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 0x4b1204a09bdf01ef601cf526cef66bd9f921e99d11fe94a96ffc9ad5b00448f7. 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/8be2049b-fc38-4886-bc77-508059ce816d.json and https://artists.proofprofile.net/proofs/artist/8be2049b-fc38-4886-bc77-508059ce816d.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 0xbc85cdf83deffeade4123f23f7b820aba9d4294deb488aebf113e6c69e938ba6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE2EY1200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650bbda856f2c6e2b39731f504b38bb0cfcdbbf0b7cae31010dd5bc1355a4fc7. 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/DEPX41300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee3a0875e6fb4aecbd9e9cea55e825824c4e9a6fcde44469cfc932fe7709f3c. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/SE2EY1300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf250b18eef5d744721ae5fe472d2a9d5cd3a9f34aa85637730595a35e271f4dd. 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/SE2EY1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c82fded70db0bf0e58c647d96dfcec899524f63de061f9e2b279dd1f8258b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEU671900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb52ac8a25956d19338639e5e9cfd43c136b407ce8e0350c3be43967842b841. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEU671900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c69939ab366cd6e3f3327678cb5d11b0bda7613cccb234ff4a77970e214a465. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBENL2403931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15edb837a4fdab804763e40a39aee0bd2a9b5a3fe2f254d3bccc9f64f8855a13. 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/GBENL2403924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e5db450d58ff3dd9655c2384de65557a32194ca281995d1e63d9b2660627de. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:09Z), 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/GBENL2303705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7860ca2229bf2430c4a741ccb597894751975b86cfc474b72bcb564eb3c9e816. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:07:28Z), 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/GBENL2403925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c69939ab366cd6e3f3327678cb5d11b0bda7613cccb234ff4a77970e214a465. 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/GBENL2403931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84744adec036a7ddb3c76c938a7dd87feddffe0bf56e8dfa4550a0f8200eee89. 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/GBENL2403933.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8769743a6cbbf5635e48480d7973e422d66204a60196d1066169a4dd705d71b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE2EY1400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4000417c251204567695b8870e1f898ea5ff1c0d2f06d42359716ad0d7a229c9. 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/AUXN21938097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36308bcb4b7f519b6b679c65b154f1bf2b4ae99a27bbe5e5ba1e2fc3956d93f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEGL61200061.
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 0x0c483698f89efc7c7d29c8b126b2edd2b29d2de915a38aa5c004df7ad5ac1b4c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEPX41700243.