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 0x78b12fcd0bc50eb51462e9a2e1ae70ecedf653c3c04f53a09d84ba47caaa8885. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7984b51c-4c30-478a-a26a-27bd30637fe1.json and https://artists.proofprofile.net/proofs/artist/7984b51c-4c30-478a-a26a-27bd30637fe1.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 0x580287aeed1b69d99863c1ef0435373ece61750d794cc6110999c13d75f24300. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM81340569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21df12fc693c9bc058ebb4267c50db74d464875950cf80147a82027e0c9ee28. 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/USETB1800234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66743d6a302738c6fb020f8ba086c36924b739eb1b2feb57eff9ece82e58b497. 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/USETB1800232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d0a066e50786caafbc0b470b6a6f1e85d393c02ffffa3ac02c4e054d4ebae5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USETB2000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c791fda63ca02674a907b68b06bf139625a90149e83ba4baf3f7b3240bb23. 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/USETB2000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32418adf48205a17547c39f5aeef6af0a184bdc62fd77cd9c5a77d8cb3d01d8b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USETB2100534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7e13178ef7c874e95de097fadd25e260638e6960c22e07a06fbb15034dc2f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USETB2100536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4ec629756a1336ada6b89177a2bc950ec0aa0040c7f5a121fd32cee71bb413. 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/USETB2100537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565e95d57d2ccafaabcc097ab1199850b5647c4bbc1c5503532b0904c87c84b2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USETB2000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fecbebd89d5649bf54d66dad0528df1f8eaac5665cba391fb8cafdd6e1c304. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USETB2000347.
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 0xc4901bd98dbc8bfee245b014b178cd5591e95d18634b1d72e08195423a9691c9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USETB2000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9957191024a042249b1ef6ef1cb7d984c5642657f04eea68ef85e9397674af99. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USETB2100535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13594fbd2a0eaa8e9ed1b354e61996ceab14a3f57e21181403eec621a19d4821. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USETB2000344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5d7a9dede19332032ad387e989fcdff0debd2da8a737287327a8dda3edbe3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USETB2300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cfcd3b220d800e6397904fbfa4f08d38779b6ca101000424a8cb726f14e9f0. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/USETB2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dfd3aa23f1182e073f328d01070339f0394b1075b6e76c448568628ddf38df. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USETB2300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cfcd3b220d800e6397904fbfa4f08d38779b6ca101000424a8cb726f14e9f0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USETB2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3970e6dc883f1377490027af4c335dd5c709a6c29b9990577bf1957794ee01. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:20:22Z), 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/USETB2300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5d7a9dede19332032ad387e989fcdff0debd2da8a737287327a8dda3edbe3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USETB2300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5270c363361b0f041e522c803d1d953c2f91ee7d511ec03d1b8918469e3d5340. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USETB2300242.