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 0xc73100d47f816d63009de3006331c38aeee1a91e7ce53d4281bfddb535d1979b. Chain 2 (Bitcoin): anchored in block 953936 (2026-06-16T11:24:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2071ab39-b59a-4a5f-8ed0-69f6007f642b.json and https://artists.proofprofile.net/proofs/artist/2071ab39-b59a-4a5f-8ed0-69f6007f642b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guitar Exam Pieces from 2019, ABRSM Grade 5
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 0x4c540b180b9bd6ff3a4a40675533af568f7a5d1f49bb9bbfcb2a1a5e53bc765a. 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/GBEYQ1825801.
Suite - Arr. for Solo Guitar by Karl Scheit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94842eed67578cec9b8e8e78be73d750ea92a13f50ebc2063315f76de509f196. 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/GBEYQ1854610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63033758014ae749d1f2ae6da59c408ae2e47b923f29a780670aff139103bc78. 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/GBEYQ1854614.
Prelude 'Lágrima' - Arr. by Richard Wright and Peter Batchelar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa9bb7f1363e4a6e8dddaf9cec13d24d6970270e4c25afc287f2fa8503d7b9b. 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/GBEYQ1863319.
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 0x1f9ba8edc56efb413f33cddede9ec3a095a9f8705429eaa42f1fa06ca179efbe. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBEYQ1825822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5114d23b5128a5e5707624447e34a973568bedd2aa46032ceddff1243a00f8c1. 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/GBEYQ1825821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2372767ad7995afe59156e1f84c4122ae7b629176a05b7152114473830f79de. 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/GBEYQ1825823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5477065344c078c828bd7e42664991bfea8e571596b3438bbedd9891281e55. 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/GBEYQ1863329.
Guitar Exam Pieces from 2019, ABRSM Grade 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ffb807fb907cbaa9c929e49bcd2aad675a92405ff9ec1188f8170906757f42. 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/GBEYQ1823422.
The Sound of Music - Arr. by Peter Batchelar and Richard Wright
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3b3534125ac9d3085082bd657104f7de06c27181d310b27939f01423900df3. 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/GBEYQ1823427.
Guitar Exam Pieces from 2019, ABRSM Grade 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e3b0f366a330638afd66e64bef21a923921c84648363e9ad6f9b81067302a7. 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/GBEYQ1865709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f84fe9337b0924af8c76213986746040aebbbe648144704c4e3898b6d7acf4. 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/GBEYQ1865715.
Guitar Exam Pieces from 2019, ABRSM Grade 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b0947c8a2d430b83cf4fd4b7edd02eebeed53a0d4bfad6b3ab3a7b6492ab34. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBEYQ1824121.
Guitar Exam Pieces from 2019, ABRSM Grade 6
Guitar Exam Pieces from 2019, ABRSM Grade 2
Guitar Exam Pieces from 2019, ABRSM Grade 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655d2379ddac977aa9b98696574369e9a8536f50c1bdbb2d4318303a7ae4fc48. 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/GBEYQ1866416.
Trinity College London Guitar Initial 2016-2019
Eddie Mcguire: Music for Flute, Guitar & Piano
Guitar Exam Pieces from 2019, ABRSM Grade 1