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 0x9d86ed002931dae9ca62a22582ded77f70bbcc239eb907d3f4bff6e2ef795e66. 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/bac4a587-d32e-4381-9375-eac62a1b5b75.json and https://artists.proofprofile.net/proofs/artist/bac4a587-d32e-4381-9375-eac62a1b5b75.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 0x391cf66b1f41e8c383b1f5801c2e4de5aa74f3af20e457794a6713543ba779c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRWMB2400712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b7a73a74c672438060104859247e3f5851500c9701a4fde2058eaa4495d0a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BC6X92500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df75a958d8423f370efd39c7cbcd3e9dba40d8ccb271d3e6269477b7e8c2b70. 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/BC6X92400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9d9123cef26e22f2506755989930b35fdb545b640c332e7d40a9e1a47d6860. 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/BC6X92400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8191407b2ab8024d188aa7e6f66dea390aa0489ca947cf21701737fb1c81de. 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/BXIV82413032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7125300ed61afe6a007cbae7d2a7d908033cc74f36f16cedb89cc54e8a048a9. 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/BC6X92300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e32b99223fd8772120654bcf1f32283e9be95b56247759c693ec2a704a959a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC6X92300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025c0a715a0c1ef3c922b1a1180df51ebc0162c0ce4e36ee283f9be86472d613. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC6X92300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017d494960a1afd1745dcbb63b09a00a3dde27ebfb1192abdce2b44320cd680e. 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/BC6X92300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1323efcfdd94ead9ee060286e2469919dbba1977627a9dcda810859de84796e0. 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/QZNJY2129133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6828a6090ee6625cdc4bfb0fedd2e7dd1279db297c9037b3fb2f0fa57fab1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKP8K2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccd7fcccd41341813d024726dee6880a63eedb83f4c5e2d442cbf7c204cf083. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:44:56Z), 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/BC6X92400008.
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 0x26aecd969003188919b285f7144bce70e4ab7d4c97b8d432563dbc67947821ae. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:40Z), 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/BC6X92300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf558679a2ecc170659d481f65e643ecbc217e7a2fa2b480b987af69d1e5629d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BXIV82490213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5933226cbf65295917db61e27fccdc3e5a7316981e788e10549a5c314459eb9. 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/BC6X92400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b06ab6a2b6a783af2f22dce742944fdd76725537c257fe733a1536f1752959. 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/BC6X92400002.