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 0x553badd39c487bc15b6bc6e36111562ba5e3379a059367b2430151e93f992185. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccd60ec6-2d25-4bdb-939b-cff6cdd68df3.json and https://artists.proofprofile.net/proofs/artist/ccd60ec6-2d25-4bdb-939b-cff6cdd68df3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Toccata & Fugue in D Minor, BWV 566: II. Fugue - Arranged by Charl du Plessis
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 0xf9b884a4b5b3e0c19c36d37c9f4a68e52ff1e5ae85e58c84bfd6f4b67ccedaec. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660902 — a six-check JSON result.
Invention No. 8 in F Major, BWV 779 - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe472e7a8bf3cef5d962059c9cd9e33f8ad5fae6a2228fe7ebd2a911e85c0f867. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660904 — a six-check JSON result.
Invention No. 4 in D Minor, BWV 775 - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfbab85dd8615852630094c35b20168299e70658c37e7a1330fd8f391098c05. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660905 — a six-check JSON result.
Invention No. 13 in A Minor, BWV 784 - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b629ac3b4e00b1edaa11e6f666b862be1ec5fedf8adfc6e6132c7a5f3224ce. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660906 — a six-check JSON result.
Orphée & Eurydice: Ballet des ombres heureuses - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dd6d470e2b73c629a9b7458681a6733244ef480e2e2f8fad4311a34628f0d9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660907 — a six-check JSON result.
Le quattro stagioni, Concerto No. 1 in E Major, RV 269 "La Primavera": I. Allegro - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8152951592e13f6015caa405bdc9a25a90d3b63ac99fbbaf850b6eaeaed64c. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660908 — a six-check JSON result.
Le quattro stagioni, Concerto No. 1 in E Major, RV 269 "La Primavera": II. Largo - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2070bec4700f9901193352c69f2715a8f33a126033ab3a15f560dff5c6a6c3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660909 — a six-check JSON result.
Le quattro stagioni, Concerto No. 1 in E Major, RV 269 "La Primavera": III. Allegro. Pastorale - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb34715bd02fee07f0d2b44bb5c110c7d637852c37c6e6ec2a1bad70f3807f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660910 — a six-check JSON result.
Suite in D Minor, HWV 437: III. Sarabande. Grave - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f63279a6b4bd9225c434689e6d7198ef0c07f89bcf2ac4e616ff07c8d887a32. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660911 — a six-check JSON result.
Prelude & Fugue No. 3 in C-Sharp Major, BWV 848: I. Prelude - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050d25a3e9dcd5cc2fc0e4f412f092dab07e607a51c8e152ff21cd9c8636cee1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660912 — a six-check JSON result.
Prelude & Fugue No. 3 in C-Sharp Minor, BWV 848: II. Fugue - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3065bb0f407c494870c9f64de4c686150fe2d886ff1c4e221be1d665cc3f6a09. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660913 — a six-check JSON result.
New Jazz-Suite: II. Allemande - French Suite No. 5, BWV 816 - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c83191e82f57cc48204cf1b2fee6d08ae8461c3fe2fdd06dbc5a1c0507b0d5b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660915 — a six-check JSON result.
New Jazz-Suite: III. Aria - Golberg Variations, BWV 988 - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e88f494c7cdc61bae3a7572ea2bc1baa58f9cc3ba7d3ba8ebc57b1ce99f0663. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660916 — a six-check JSON result.
New Jazz-Suite: IV.Sarabande - Jesu, Joy of Man’s Desiring from Cantata, BWV 147 - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe505c9c8c87502a8c6541d62b816e5a52e909b769a6b739e02ee61033979e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660917 — a six-check JSON result.
New Jazz-Suite: V. Chorale - Ich Rufe zu Dir Herr Jesu Christ, BWV 639 - Arranged by Charl du Plessis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8472781589d05c8a2be77b12883b3ca9678d822e88aff7e6f3662a7afd46c6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261660918 — a six-check JSON result.
Rinaldo, HWV 7a: Lascia ch'io piangia (Arranged by Charl du Plessis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2024a8af5de71c8579848338482e20c8aa4838adea18c434b898950de9c2a8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261372803 — a six-check JSON result.
Canon and Gigue in D Major, P. 37: I. Canon (Arranged by Charl du Plessis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd42847c07839ea8308ab05b2fdc79525240295d2597ed87cd1e37631d7083. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1261372812 — a six-check JSON result.