James Blades OBE (9 September 190119 May 1999) was an English percussionist. He was one of the most distinguished percussionists in Western music, with a long and varied career. His book Percussion I
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 0x41c2370914c7988397a224a4c6f50eb4af0968398ec6acff15fb1202a4d5a5cd. 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/fa542c72-39af-416a-846c-d6ba9fc86f79.json and https://artists.proofprofile.net/proofs/artist/fa542c72-39af-416a-846c-d6ba9fc86f79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
U.S.A.F. Protestant Chapel Choir, West Ruislap, England
Children's Choir From The Kenton Methodist Sunday School
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 0x806f013b500b0837e1a7fc452e58eb2081c5f8a58cae12a69a4b08be7e60f72e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBF076311580.
Haydn: Mass in C Major, Hob. XXII:9 "Paukenmesse": Gloria
Haydn: The Creation . Missa in tempore belli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4086e28d2600121ced095cd92b2f01131a3ba9b3f8df70e75dff49018cf74d. 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/GBAYC0601564.
Haydn: Mass in C Major, Hob. XXII:9 "Paukenmesse": Quoniam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98a0bf70c96257a34321f4eca08031332193f8d9e6e63dc5b944a0206f4939f. 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/GBAYC0601566.
Haydn: Mass in C Major, Hob. XXII:9 "Paukenmesse": Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5325ed64ee77d2c467f5f5cd2ffc339d87f033f4742672ed503e550ce7f3d1d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBAYC0601562.
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
Haydn: Mass in C Major, Hob. XXII:9 "Paukenmesse": Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9fcb859b87a4acf3abe4a3d3319aef4a70a7ff6850884843a004ad89961c75. 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/GBAYC0601565.
Haydn: Mass in C Major, Hob. XXII:9 "Paukenmesse": Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa54fc7b0d8aef85e13f7edc9e01d2ed0069571b143e83f0db4aaf55344433f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBAYC0601568.
Haydn: Mass in C Major, Hob. XXII:9 "Paukenmesse": Credo. Et incarnatus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0075e4623a536a0187d3989442f3579562a83891c0d90eef79272507ecfa2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC0601569.