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 0xac984ec66be243d145eb39a589bd09d8c17c0f531490d231cbdc6aff3ebc6144. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6782574-7da7-4e5c-9a46-4e48e7ce339b.json and https://artists.proofprofile.net/proofs/artist/c6782574-7da7-4e5c-9a46-4e48e7ce339b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x6e214d1437aa65a6901c1c961072b5879ae587181dfc6c3d22d72937a71e2400. 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/QM4TX2182842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f8d70793de3951776505ddaee6ca63ee491f3b3bef57a05eece52a7ce34bbe. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QM4TX2182843.
Brimborion, Op. 11: Romance sans paroles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d3656bc2757c9693972b897fb4df6a9098d7a489bed3d358ad506ee4046c2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM4TX2182844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1a031251fe298dee3cca56f234d8f340204a62bbec246af2f34706369ff4ae. 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/QM4TX2182845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67b1e95bd6801b7531680e5630915c0159ecfc82636ac3d6bfcb46d8f6e8e09. 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/QM4TX2182846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83d62f5af91e90204338fb84618cbf8788aa02a2e395138410d48210866d4da. 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/QM4TX2182847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c794e675a9492802b459a8b477041c23d7e6f9191ffc584ed93fbe668e7a49f. 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/QM4TX2182849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68547ce234af99a1c6f9f8bd1de392785ff357c94e9bf3f40f5eb9a922f7dc1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2182850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc463fccc733e7e2184776e09259ff0246bf734dadc640230c8e10922de375e3a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2182851.
Estrellita (Arr. Abril & Barrueco for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1bbde979a04c75e40ff1650f2bc221f93410fcd86199c93092891dbdbb03a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBBBC2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c484c1fbd512e276886d1880f3cb358684ea650c653fff2daa3ad44946562e9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T13:53:17Z), 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/GBBBC2400103.
Chopin: 24 Preludes, Op. 28: No. 4 in E Minor. Largo (Arr. Harb for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffdd5086290d908c0c4e19bf3b382eaf1d5eb305a9b031f3c81f7d20398ae13. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBC2400402.
24 Preludes, Op. 28: No. 4 in E Minor. Largo (Arr. Harb for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c847801e091fbe753a07deabd88529e8b7344eb2744abaedd3caa0b06668f33. 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/GBBBC2400297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dae67c6c91529a03c12833e7a3e6b3f95d9bd3e655bcddc33c46b583c9be1eb. 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/GBBBC2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c484c1fbd512e276886d1880f3cb358684ea650c653fff2daa3ad44946562e9. 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/GBBBC2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1bbde979a04c75e40ff1650f2bc221f93410fcd86199c93092891dbdbb03a4. 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/GBBBC2400104.
Belli: Prélude (Arr. Lewin for 2 Guitars)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2a9c1f63ab153de3b050e1f625fefb666d2abf00200770309d175a280a9ea0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBBBC2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffdd5086290d908c0c4e19bf3b382eaf1d5eb305a9b031f3c81f7d20398ae13. 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/GBBBC2400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c847801e091fbe753a07deabd88529e8b7344eb2744abaedd3caa0b06668f33. 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/GBBBC2400297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c484c1fbd512e276886d1880f3cb358684ea650c653fff2daa3ad44946562e9. 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/GBBBC2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1bbde979a04c75e40ff1650f2bc221f93410fcd86199c93092891dbdbb03a4. 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/GBBBC2400104.
Grieg: Lyric Pieces, Book 1, Op. 12: No. 1, Arietta (Arr. Lewin for Guitar)
Lyric Pieces, Book 1, Op. 12: No. 1, Arietta (Arr. Lewin for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb7b7f71edad036bc3da3fe55960a636e8a1c5960b2a9a7b3a5cb1b64a6e800. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBC2400462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2a9c1f63ab153de3b050e1f625fefb666d2abf00200770309d175a280a9ea0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBBBC2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c847801e091fbe753a07deabd88529e8b7344eb2744abaedd3caa0b06668f33. 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/GBBBC2400297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dae67c6c91529a03c12833e7a3e6b3f95d9bd3e655bcddc33c46b583c9be1eb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBBBC2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c484c1fbd512e276886d1880f3cb358684ea650c653fff2daa3ad44946562e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBC2400103.
Beach: By the Still Waters, Op. 114 (Arr. Lewin for 2 Guitars)
Tiersen: Comptine d'un autre été, l'après-midi (Arr. Lefvert for Guitar)
O Holy Night (Arr. Lawson for Guitar & Cello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedae2ffd34a531b07a43d35e32f22045e033808bc09999c05546c4d842820f20. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBBBC2501073.
Glass: Truman Sleeps (Arr. Cousins for Guitar)