thumb|upright=1.18|Nicholas Lanier, painting by van Dyck, 1632, Kunsthistorisches Museum Nicholas Lanier, sometimes Laniere (baptised 10 September 1588 – buried 24 February 1666) was an English compo
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 0xc9fe7e47b74d541ce51c86ee9123fd224ac3807c2ca3a321da6eef46ac1c055a. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10da3a1a-1ea1-49ae-a551-be343425c771.json and https://artists.proofprofile.net/proofs/artist/10da3a1a-1ea1-49ae-a551-be343425c771.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
As Vesta Was from Latmos Hill Descending
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 0xd3bd8555b402eb25786004f70a64cb1b57199d43c5944f73bddd0f61663edd13. 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/GBAJY8101912.
No More Shall Meads Be Deckt With Flowers
All in a Garden Green, Four Seasons of English Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c5c2c3a5d9e7ca59926c9ff23d95ab440c4aa362f7e81fc29ad1251ff1818c. 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/NLY331208136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cd8386c6c450510fd93dfaa59e8c1efeff53f584e93f92f72c75334ae5f9d9. 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/CAJ721468504.
Selected Ayres and Dialogues: No more shall meads
Perpetual Night: 17th Century Airs and Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4504cb8dfd7a6ef9f3494699d4f1e4d1cc0704e426b5a4421cbcc6868ffd74da. 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/FR7JM1735060.
Musica transalpina: Musical Migration from Italy to England (1500 - 1800)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b342b4c1e5701e94285084944bc2733acd93469cfe0a786573cca9817846260. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7141500541.
Elegies: Seven Sighs or Passionate Plaints for Sorrowfull Souls
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab0851ba3bd521947f293bbf19f8a6be50b2879f540f8aee3e19731c283d729. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ES7141500608.
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