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 0xe050ef9a597ec4a6bf940f70c05b031548080c8a7bd9d6281f416ed4425ad4ea. 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/1b8d90f5-6fa4-4ffe-9b32-25de9a16f712.json and https://artists.proofprofile.net/proofs/artist/1b8d90f5-6fa4-4ffe-9b32-25de9a16f712.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 0x95c2c97f761e9e386e7a3ea3b647a10a688f522f031891acfc8f1d89fb0fb6cf. 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/USMAC9300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a7ee77160afab9e1698d1ad4ecfcf6824392307a6f7755e7b13dd3d7e449cb. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USMAC9300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d1b401fb4bacdfed57f8bc859f83ba46832d0295ae6d1c7234eaf3a21577e3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USMAC9300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d2f66b52b073b86667f9dc0b0c8ee4c7d2b81cec0c501930c3b69916cd98dc. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USMAC9900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ed286f19248340249b0cb3584f55d121367d40568118676605acca5c2942a6. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/USMAC9900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25902c054cc7e05acb0b73442177ac5a9c6572b8efa79f0a9a99ccf1f8410a89. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USMAC9900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6971e1fe6db93b83ddf2bd5a1f3c5a398abd5f1627b8901c0c754b36b6f204. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USMAC9900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadce824d368bccaa1a640648f6c067fb571b7f8b378e60921a697ec3d894c969. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USMAC1400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2e9e7205247d71a5d94e549a6a5bb82127e1005f7febe04bcd2d644d7d5134. 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/USMAC1400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559378fd09b00ab8dcfa401fbf63fb66439a622e39e6a112663bb00ea8885af5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USMAC1400040.