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 0x9815c4f2de1ef9b5739abc8d08476580abac0768444ce0ba0d41cb8bd354ddcc. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87ed3f68-aa0b-4a69-9626-9ce741795675.json and https://artists.proofprofile.net/proofs/artist/87ed3f68-aa0b-4a69-9626-9ce741795675.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
D. Scarlatti: Stabat Mater - Schubert: Messe allemande, version abrégée (Mono Version)
Bach, JS: Matthäus-Passion, BWV 244, Pt. 1: No. 20, Aria mit Chor. "Ich will bei meinem Jesu wachen"
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 0x849e16bd96a90ea9627529fb51bfb6b823581003dd563905383c4f44f8147e43. 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/FRZ209202330.
Bach, JS: Matthäus-Passion, BWV 244, Pt. 2: No. 30, Aria mit Chor. "Ach, nun ist mein Jesus hin!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9bd485ac010ad1f7bd8dbc86d2949fa186756bd7652908b85fd6ff8e631ad1. 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/FRZ209202341.
Bach, JS: Johannes-Passion, BWV 245, Pt. 1: No. 1, Chor. "Herr, unser Herrscher"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e4fdce2a0b5135469032cf3bd49e9eac3bbfb5a182867bb2000fed4abf5237. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRZ209311501.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 22, Choral. "Durch dein Gefängnis, Gottes Sohn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b1bd5f750a63e8174b39503a6b3f75c966cf8c2c9b796f40da771b1d9712c7. 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/FRZ209311540.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 26, Choral. "In meines Herzens Grunde"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1332787304e8e453540cc808ab27ef2a858825a25d18ec21ba79ed10904a42d4. 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/FRZ209311552.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 39, Chor. "Ruht wohl, ihr heiligen Gebeine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6879244b15d5c204de99c4286c3829bc7bebe275ccb25454ccc5e29e3f9c8c. 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/FRZ209311567.
Bach, JS: Matthäus-Passion, BWV 244, Pt. 1: No. 3, Choral. "Herzliebster Jesu, was hast du verbrochen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383d17f4a4b2d1c46b224b2418ac76d12a9a43c381831efe13c835a744ab2889. 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/FRZ209202305.
Bach, JS: Matthäus-Passion, BWV 244, Pt. 2: No. 60, Aria mit Chor. "Sehet, Jesus hat die Hand"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf56ebcebcea38ee1be309d2fa3f07b0146ca940e74e840d6b2ceb3a68b7d5. 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/FRZ209208820.
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: Johannes-Passion, BWV 245, Pt. 2: No. 24, Aria mit Chor. "Eilt, ihr angefocht'nen Seelen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd608fc1bacabd68b56b883aa11c3c631f82afa2d769ca8b509a601e2da1e7013. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ209311548.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 32, Aria mit Choral. "Mein teurer Heiland"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8da876eb58e4d469d5bc0811c47cfc7f9c5c58150773f39476068b6bdf38a67. 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/FRZ209311560.
Bach, JS: Johannes-Passion, BWV 245, Pt. 1: No. 3, Choral. "O grosse Lieb"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b25c708195e4f088458d6f66c5153d0ffc8b3003a72d60d1996a2b534cae5e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRZ209311507.
Bach, JS: Johannes-Passion, BWV 245, Pt. 1: No. 5, Choral. "Dein Will' gescheh"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f180e1426b8e5d37f2f7c3ec6f10ce75acf7364db687d20eedf2286493c37eb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRZ209311509.
Bach, JS: Johannes-Passion, BWV 245, Pt. 1: No. 11, Choral. "Wer hat dich so geschlagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a9639e166baa4c746ea618befaa6a4ba005067b710e282f1c73d6ed1db24b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRZ209311515.
Bach, JS: Johannes-Passion, BWV 245, Pt. 1: No. 14, Choral. "Petrus, der nicht denkt zurück"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb763fee8f739eb2eda9bf06cc0086ba4689aa4f9efddc96c2537df255fcbdcd. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRZ209311520.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 15, Choral. "Christus, der uns selig macht"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab793072ef5bc74ed2c96f6ae823b1279e386dd65d970105c177a8bf476c6238. 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/FRZ209311521.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 17, Choral. "Ach grosser König"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e73e84b6e6758342fa918fd40d79dbf73f2fdae1319f30227925f68502e7fe. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FRZ209311527.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 27b, Chor. "Lasset uns den nicht zerteilen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f9898dc5293663a32e5c1d830a0c992caed765b25b7c1564fb40d94bff88a2. 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/FRZ209311554.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 37, Choral. "O hilf, Christe, Gottes sohn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71275dfe25ad1a5c4c2d5ce860075a51ab2580ec6dbdbf532f9ea1a3c2870d2f. 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/FRZ209311565.
Bach, JS: Johannes-Passion, BWV 245, Pt. 2: No. 40, Choral. "Ach Herr, lass dein lieb Engelein"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc52ef19575f3015c2e16509561871202409443aa53e63ee2edb1de20fce925. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRZ209311568.
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.