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 0xc812fbfde46e02fd210cbb1b292fa523d08a1bea371304be0e3f89dc5df61527. 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/a9a85407-f289-4ee4-8e40-8a5fe3479912.json and https://artists.proofprofile.net/proofs/artist/a9a85407-f289-4ee4-8e40-8a5fe3479912.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 0xd62aeb333961ba03f3def01c46d15493cfa6bc828263674938430a58d6526cc5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXSSW2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648cbcfb3782e662b4bd8434e759a2be776c8e5dae3dfc4fff7c0302ee7366a2. 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/BXSSW2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cc4ef8f658ed3cf92886a38088d52c79e99cd7ad97be66b2fb8f2dd61241fe. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXSSW2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d90bcda190a4f92f8cf5a098fe9f083d3de77bfa99e6f2eab9e5f23c583036. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXSSW2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d867eb7b3f817768d1738bbc1b7672ea333b5d0a9a26857764a6072deb8e82b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXSSW2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9624d9f0edc88e372573073e52426e2c29045f30efcec0b8a0465fb1bebedd72. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BXSSW2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11cf17a4fc03da4dad6a98040cdb0ff7bbcf0dd3d9a10e960e9aa0b7534133a. 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/BXSSW2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa280aa451e6a1ab709b522a44a9f1b3dc8336a0c296dcb342ed3ecbf6f19169a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXSSW2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c34f010ca28afba7a9a1d99bce0ca5c2e8596611306de91797ef94f5fca24. 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/BXSSW2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb607396dfd0d3db985b28822281a7e3bcd50c4fd0be881cc3804acc6390fc9c7. 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/PT1GK2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d29dc016855c09f89ad6bc9a1ad82e45130813d17ca0d8ac95240c194aecef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX0BA2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f055f3973933b123171c762f384d89453d549c7b46b8c54dd823df37c8bf71. 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/BC82V2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35864397bca102b4d5eb10f13365fdc977074be8201e4364e2bb29e1dc5b4341. 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/BC82V2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23549c46a1e10762083ea31d6ea9e6b1f13ad03a21c8573fd19bc6d76e1328f5. 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/BC82V2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45584f060a113a8a5fea2f547e8e962a57ce75e8fd5f85c764542776fd1b573f. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BC82V2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4f8759af777654db57a7d9c1a886ed9e269113b0413bcece2087ef5bdb3a16. 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/BC82V2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567dc76b93aec85851868f1f8223709b9e95497fb585f95246127a94091eed78. 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/BC82V2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71691187ef3d62bb327da036da264155446cd283c5573f84b52a6db9baf4a61. 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/BX0GC2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa7d8d0100fbc3b913e9b72f33decc3d09916be9045bb89e8de6efbe9018c1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BRJ052400010.