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 0x755128b0c9ebb745b2aaa5be1dea43dd340cdaa1c9bb65412d622ebe3e6b34a0. 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/029c9edb-b06c-4c80-95d8-c591bffb637b.json and https://artists.proofprofile.net/proofs/artist/029c9edb-b06c-4c80-95d8-c591bffb637b.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 0x56e09619c065d17c84c660b30895deacb784b2ae6f5304fa5f441fc12d52a35f. 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/USDY41631006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaab3614db67d618fc6a97b6c85aa183f7cfb6b235015daf05d8caca757277a9. 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/USDY41631007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369897c0a9049a55f8f20b957c32e61713f0bd259120c236009d81f9a90a1a79. 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/USDY41631008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6976b8316889b00f63ec896066783597899dfc3a476e5c483af69dbcd6312c. 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/USDY41631009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c36933a5db21dc92d14323c60564b8d8970903ca56ff5ba75074e474d0d4a28. 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/USDY41631010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193227c84f06d503739450ef71391db039b772602dec8439cdb1a430b8aaab51. 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/USDY41631011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e25d67010383ecb5a67677ad885957088327a87136c2525b4b2eadf050436e. 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/USDY41631012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4418706d9e1bddc20dba78b8e3879039432c439dc7f85af70f65b39fb3900ba. 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/QZTBC2378112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce440acd45c3fe65879bdf9ae369404b4eabff6c8f24b1d3f844e311524d0fa. 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/QZTAW2378456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bba7186aebde7adaba5ae3e43b06063c4eed24de249da92c7b37abd2261c88. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMEQ2381617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6216ee1f5ceb46b5b51938a1f2af2c5d3909dffb43df15c6e61fcf120ec91f6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTB82209889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4e9d5d93113f4b19e0f440bfeeedc234e5df69031080e4a0a76ec23660c316. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGH2187527.
Simple Life / Weather Balloon (Just Another Day)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dd70703022255b8b3c4c084b646c06ae5519fd3ef92f16c471cfb6995916c1. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USHM82077378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8d29c60ff1a41b546f6c8b9d5b5092d9688178cd712b7bb5f96eb292b6045b. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USHM82077379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc980033581707038c0511da277a423964245b28e1685b713a8fead32c95ef7df. 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/QM7281970928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f3012a62e36e4b6c594f287c2bfdb7a73b2c1a72efaeb790bc125379338db. 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/USCGH1975347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369897c0a9049a55f8f20b957c32e61713f0bd259120c236009d81f9a90a1a79. 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/USDY41631008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf183a42b40255912140b4d3300a9eca486855b9bf38d480651914fd593c8f017. 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/QM7281970931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b20a715d7f66024b19a354316f3ecb8eba4abd9c03cb6f53cc5b813949919a. 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/USHM91871416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f3012a62e36e4b6c594f287c2bfdb7a73b2c1a72efaeb790bc125379338db. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USCGH1975347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b20a715d7f66024b19a354316f3ecb8eba4abd9c03cb6f53cc5b813949919a. 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/USHM91871416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cb0218e3ee7e107ab4472758db8b0a98bc0a859381c8cf9c3cfe9cf85dcfa4. 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/USCGJ1759946.