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 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 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 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 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/GBEYQ1854610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63033758014ae749d1f2ae6da59c408ae2e47b923f29a780670aff139103bc78. 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/GBEYQ1854614.
Schule für die Guitare - Arr. by Richard Wright and Peter Batchelar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6725bcab9cd4d62ce450c86a993e5fce03613256e87b0be8369e836b70f5ae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBEYQ1854618.
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.
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 0xa82720c5d5ca575fc12b65d90c4d0daa18abab80f485c57dc87af48f48db22b7. 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/GBEYQ1854624.
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 0xee74daf57ebd3925a73efdd656f8f2a810e3e02a9e3198f1b0a413b54dd07960. 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/GBEYQ1823402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ffb807fb907cbaa9c929e49bcd2aad675a92405ff9ec1188f8170906757f42. 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/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.
The Wizard of Oz - Accompaniment, Arr. by Harold Arlen, Peter Batchelar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa296bc4e1fa5f322c9ed7a0ecbddb5f575354ec30e7866f10462a992918daa64. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBEYQ1823437.
The Sound of Music - Accompaniment, Arr. by Peter Batchelar and Richard Wright
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79065c2d7bc58483487a7f61205b7f5438210176073db836f299de046c70a1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBEYQ1823438.
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 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/GBEYQ1865715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8087636144e34a94dd2f6f0731227022c9a52e108798fedd39b1b3c7e2c94aec. 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/GBEYQ1865720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf408157026d0534112167fc3ca3e4245597d0c5691b715f857e54f8fc4a37cb. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBEYQ1865726.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057ef46116b94fa07a2e93bd223083beda65206de1a9941c6e1eca5313c0a43d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBEYQ1864006.
Guitar Exam Pieces from 2019, ABRSM Grade 2
Guitar Exam Pieces from 2019, ABRSM Grade 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c5d04c1ab679dbfd1715a3f24f03ee2e4c09694fd48b6562fec548f7413570. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBEYQ1866401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c618d84694867d151369652bd618e23cd65061318b1597f885dd41b379e7c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBEYQ1866403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd102c9e18389fdc050eed2238ecd3047a3a6f1847d7c3dc031f9f83803dc9287. 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/GBEYQ1866409.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb2ff496bf694ba82daa0011e0d07f4745dcf2a1b62116c266e0fb1af39d14c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBEYQ1866420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ffa950cd197ff0c1217ad1b8ef75dcfaf3d3b98c6427f3a78b74e686b97151. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBEYQ1866421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d749b18a25e60b97bad96e0e98d7bfe95555d68458140a0a28f9d6d6661bd. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GBEYQ1866423.
Trinity College London Guitar Initial 2016-2019
Eddie Mcguire: Music for Flute, Guitar & Piano
Guitar Exam Pieces from 2019, ABRSM Grade 1
Jasmine Flower - Arr. by Peter Batchelar After Chinese Traditional Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108dbd32e92ebdb3e7a55b044d3a0de133841194d25212becf182e54bc70fd44. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBEYQ1821001.