Sir Walter Parratt (10 February 184127 March 1924) was an English organist and composer. He served as Master of the Queen's Music, and later as Master of the King's Music, from 1893 to 1924. Biograp
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 0x2c5ed540c448208d3d54eb1e1cfc2285adfe6950d64d74c6d4e88d9d9dab7333. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edb02463-0597-4271-a9e8-4df3ab35d384.json and https://artists.proofprofile.net/proofs/artist/edb02463-0597-4271-a9e8-4df3ab35d384.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
An Oxford Evensong (Featuring University Composers)
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 0x2a38c1f9528b1dd78e587faa044426568969a0f8e3b73bb8c519a5d4a2ed3627. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBC7N1043505.
Psalm 90 "Lord Thou Hast Been Our Refuge"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705defa66b6ee6bd39bc1ec729437d7d71cd99bd3decf870f84f114734ade2c7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBXUX0840906.
Psalm 119 "Blessed Are Those That Are Undefiled"
Psalms of David, Vol. 5: Praise the Lord Ye Servants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba27b5574606f280842a90843e73a7bbeee7d94427cbdb1c94267827695e48e. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBXUX0838707.
Psalm 92 "It Is a Good Thing to Give Thanks unto the Lord"
The Complete Psalms of David, Series 2 Vol. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7b7a4b563eefd713b041ea2a258183b7a84b6c5f6057675cfce11ae3308d09. 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/GBXUX1412004.
Psalm 96 "O Sing unto the Lord a New Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcb610f52dd472ffdbf587de97abc72c8ce690634ece42acc1f3fa058544199. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBXUX1412008.