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 0xfe416c97c3a628dd5dacff3e54d48e9916ea2e62d0a727cf93e583d19c001fb4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5dbf0fa-96ad-4961-8420-69db250ddf9c.json and https://artists.proofprofile.net/proofs/artist/c5dbf0fa-96ad-4961-8420-69db250ddf9c.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 0x48a1f017da7368009e6b94bf0e49c1cecfe1654f603e8f715715c06756aa4573. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM92061374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e5fbd7bb0648925e17c067b592b9dc12cb33604a177e6fa5eb5e99caf8d190. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:43Z), 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/USHM92061376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f173bf62ba7a9d504121947999a0c34494ba7dce77ce8e175fe1eec9fdbe16. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM92061377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfdeebb4ee61dd6e4434fb84c8bb0693d67dd45d3eb7c5ebf30de38ff77b6d3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM92061380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74258cedca0395d9ed26239a9e5caf7b51d01f6cddcfe1c7b42afb3284bb855b. 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/QZ2J21504856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ecfa97c197dcda88e4960802bcf1a962b5a2dde8131e9db12b89ed6f1fe24c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:31:13Z), 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/QZ2J21504858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed704b68eef36567b2434788e030dea0c13865fcee3ba1b35c3d618f30edceb0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ2J21504859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5456d709d0aa10e2ad7ca52aeaf419f63907f3157047a9fd13db8dda558eb4af. 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/QZ2J21504860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968e3a92fd0633635df05c454a741514bd220ab24518bb47d36441cb3797283b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZ2J21504862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e65ef4823cf5dda6ce420e1f5440c785067897eb03170cc1ffa61f54aedb4a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ2J21513720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992f7ddbfb7694176156d9c986bed11b52b9f792e8458d25003af6fdac5cefe4. 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/QZ2J21513781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b2465aae34275a7019dc27b677f10985fa006786be6f0930d1d3977495050c. 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/QZ2J21513721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc458a3e4d50d643349e54ab824aa107e5d3086eb3624b6abde8664b8f911b906. 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/QZ2J21505329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1c19a7ed67cd7baed0d1a800bf97216c5e49fd909de9010d1cc255ea1bd43b. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:43:44Z), 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/NL8RL2325969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99def811c7f1e02bb1d6b0406ef634b24311f8ac47f0d3654c3acdd8f8547a91. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:34:00Z), 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/NL8RL2500397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e272182b27cebd5e2835a47c6b261356c2667c4e7370f7dee856f03ce7487f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL8RL2505283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bccf3556b58c018b87a9848d49ca3b421f8720fa1c067af48e319db4525d187. 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/NL8RL2505284.