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 0x5e5adfe7621549c8f0679ed62a041162aa74158ace10253fa4f96e5f6588e388. 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/7bb110c2-f49a-4d5e-bfa7-c7b8e600616c.json and https://artists.proofprofile.net/proofs/artist/7bb110c2-f49a-4d5e-bfa7-c7b8e600616c.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 0xdf8395e263c6f76a736fb50cf807539702370c7794e24245431568304e78d1e2. 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/QZFZ32137584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc37f31a06a4c13e5e1b76d320f5331750707fd4910ae9054796581407ce573. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFZ32137587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3065bb6ec06ab85a9ad2483e36807a41520344de99453d2bd5636978dd833d87. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:29:30Z), 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/FRX762190393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e8be3521c26eeb1811d6265f9042e469a5c2cd1dc3e6304db495472b93d9db. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:49Z), 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/FRX762190395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3eb3de99afb5cc15a24fc993ec0064937ac5c81c84808d33efc874f776f3aa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLCK42227135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8aea0bd095493c224639225a2021c3ef4a88ba3beaee7311c54781af87feee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52455742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd3d68cd6885b9aff156c185445e0e4aadc15bc5e7fbe2260f72bd34cbe912a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN52455748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2025f2a607b18e14e2c859eb4cf24849a11128ccb33611f2422c8d2c2f36060. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:49:12Z), 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/QT3F52594999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3eb3de99afb5cc15a24fc993ec0064937ac5c81c84808d33efc874f776f3aa. 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/NLCK42227135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d1ef490960f807dd63ed84384ec4175816dd031ed1854377ecc1d4e1be81c4. 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/ITXDW2000898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57504e27ace04c49063d6069f8fbb6db401ac8f937f63ebe95b09111b0b3a4d3. 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/QZWFK2338414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f48677f6ec977c702e381e8ddd308eb1ac721322561ae78e9c4e95fa597920. 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/FRDX62202360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f90be49b1d28f4e966cfd0670fbcfcbfb440c530190059d603035687d674a5f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BEN582200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cacf1ae4214390533070b1de037096a45ac49fb1e9a1056e936cbaf04d3d8b1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA0S2484511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d42eb2f7e7e216226a7bfd48bec47803b3023fe820573aff1e9f591276c83d4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CAENV2183876.
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 0xa9cf6fcf382278916e3d8d34ab73ba27ea7197903b2c086c7d202b163ac56818. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR96X2135694.