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 0x787a8320ded597b27afc6ce9b5bce22176a46f0389e4ccebbf29d9f25e2f303c. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9a368dd-27f2-44a8-9c95-1b17fd9087b7.json and https://artists.proofprofile.net/proofs/artist/e9a368dd-27f2-44a8-9c95-1b17fd9087b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 8 in E flat - "Symphony of a Thousand" - Part One: Hymnus "Veni creator spiritus": "Accende lumen sensibus"
Jongens en meisjes van het Kathedrale Koor St.Bavo, Haarlem
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 0x4b9dda3670b6298b5edb176747e95725220637f2c5952da6b0d4ddc865d01626. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBBBB0100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9dda3670b6298b5edb176747e95725220637f2c5952da6b0d4ddc865d01626. 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/GBBBB0100004.
Symphony No. 8 in E flat - "Symphony of a Thousand" - Part One: Hymnus "Veni creator spiritus": "Veni, Creator...Da gaudiorum praemia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fd9e8a4d66efdfca45c3373f7656fc301565b56cf275720958ccfe289e7a44. 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/GBBBB0100005.
Symphony No. 8 in E flat - "Symphony of a Thousand" - Part One: Hymnus "Veni creator spiritus": "Gloria sit Patri Domino"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8fc74f964511c57add9a7faab80a813d3b12d4e8e9202172fab7603dbcd16c. 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/GBBBB0100006.
Symphony No. 8 in E flat - "Symphony of a Thousand" - Part Two: Final scene from Goethe's "Faust": "Blicket auf zum Retterblick"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72558cf76029085e6c14f46f872ad3cafe30060f6461b2590b126ee49bc44645. 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/GBBBB0100017.
Symphony No. 8 in E flat - "Symphony of a Thousand" - Part Two: Final scene from Goethe's "Faust": "Gerettet ist das edle Glied"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff074ff5ffb7dddf1d4853ca9499d5422935518874b45728f16107ec7b4671a6. 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/GBBBB0100010.
Bach, JS: Matthäus-Passion, BWV 244, Pt. 1: No. 29, Choral. "O Mensch, bewein' dein' Sünde gross"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93908bf4b0ef5b161f5f0e317456c27bdc2e3e01b4289b2ba1f7d1cb824e0836. 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/FRZ209202340.
Bach, JS: Markus-Passion, BWV 247: No. 1, Chor. "Geh, Jesu, geh zu deiner Pein!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1821cd5f78b382f337a603cd8d893bcf374d98ba6cc38becf11a53d34f93c36. 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/FRZ209907510.
Bach, JS: Markus-Passion, BWV 247: No. 19, Choral. "Betrübtes Hertz sei wohlgemut"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff4fdda05f08d7b8e68ca67effb23ca89582ee8069c68cb1087555c301b3035. 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/FRZ209907690.
Symphony No. 8 in E flat - "Symphony of a Thousand" - Part Two: Final scene from Goethe's "Faust": "Alles Vergängliche"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300c4d305de50462550bb9e41c96c9f4d5dba5ef96f6522928630e8237e9fd81. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBBB0100018.
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
Bach, JS: Matthäus-Passion, BWV 244, Pt. 1: No. 1, Chor. "Kommt, ihr Töchter helft mir klagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba6a647be877cfe0e5050faa8d4102b0c2add718a9841c6a9933b5c55cde4b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRZ209202303.
Bach, JS: Markus-Passion, BWV 247: No. 3, Chor. "Ja nicht auf das Fest"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe070cd3646c00bbb3509025ebbdc6deb1a86b91a3a2426e9f38a74f3b7d04132. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FRZ209907530.
Bach, JS: Markus-Passion, BWV 247: No. 5, Chor. "Was soll doch dieser Unrath?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51803928e2d6cd18ec59d4fbde7f3d4b6a491975a1c755330f921ce14ec59241. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRZ209907550.
Bach, JS: Markus-Passion, BWV 247: No. 11, Chor. "Wo willst du, dass wir hingehen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937c1c16b04a4abf0bfcf1f57648e0685eec97f032efac814c805a21f127c66b. 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/FRZ209907610.
Bach, JS: Markus-Passion, BWV 247: No. 13, Choral. "Ich, ich und meine Sünden"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadc1c652e13791f1d2b25c939ec4fb2aa94c5ce2c3dcddee6c34738fff8d565. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRZ209907630.
Bach, JS: Markus-Passion, BWV 247: No. 17, Choral. "Wach auf, o Mensch"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7206900b49ca8185204cc32928f8319b2ba622c05f10d7123ab4440d59b640f. 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/FRZ209907670.