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 0xaba20a36dad7a40532ec164d074ad30401f37e5a0617b718f446cb78565c1222. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce607b05-2f93-4877-9c51-9e3086bd0595.json and https://artists.proofprofile.net/proofs/artist/ce607b05-2f93-4877-9c51-9e3086bd0595.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Die Frau ohne Schatten, Op. 65 - Act 1: "Ach, Herrin, süße Herrin!"
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 0x27f422ed8123821204c17edf2d2cf9dc7fa472117d105bc4755b22dfcc3fb883. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078943511 — a six-check JSON result.
Die Frau ohne Schatten, Op. 65 - Act 3: "Wenn das Herz aus Kristall"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68d499d75767d5fd036fb9a5585573c2e3ba92b0b230644f8b5882ac699adfc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078943544 — a six-check JSON result.
Die Frau ohne Schatten, Op. 65 - Act 3: "Sind das die Cherubim"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dce81ec634f211950b77aaf835f3ba422c18d1cf98cbfa24319ca0754b1c02d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078943545 — a six-check JSON result.
Die Frau ohne Schatten, Op. 65 - Act 3: "Engel sind's, die von sich sagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd573b814cf2041d380f14f4ad4aeabf2c2223d1483680fa67a4a6d98fcbfc7c7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078943546 — a six-check JSON result.
Die Frau ohne Schatten, Op. 65 - Act 3: "Trifft mich sein Lieben nicht"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde41c189f293dbb4ce2e98ba43edf26004c20eb88bf1b807916fa6ed063f3747. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078943547 — a six-check JSON result.
Die Frau ohne Schatten, Op. 65 / Act 3: "Nun will ich jubeln"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20288533ee0ca4f06171c252183397c944d1578fbc41c32cb3f2119107079e86. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078943548 — a six-check JSON result.
Die Frau ohne Schatten, Op. 65 - Act 3: "Vater, dir drohet michts"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1684a5fb1de9728adc78c9d9cb34523225798a482a2deeab873b3e740c7ca4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078943549 — a six-check JSON result.
Loretomesse in B-Dur, KV. 275 'Missa - Kyrie'
Chor, Solisten & Orchester von St. Augustin
Spatzenmesse, Orgelsolomesse, Loretomesse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284cb73b1fb4aab0c062ab4c5397c4f83b23f4d5bd4ebb8e14194a0c9510efbb. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP138528314 — a six-check JSON result.
Loretomesse in B-Dur, KV. 275 'Missa - Gloria'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f289965643852c8a26d1a952d35ad3c65555344a58ecfb7441746edd503ca7. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ATP138528315 — a six-check JSON result.
Loretomesse in B-Dur, KV. 275 'Missa - Credo'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9944f20dcc95bed7d8ac27b7f827cf6e51c778a87c0058bfa0515372866bafcc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ATP138528316 — a six-check JSON result.
Loretomesse in B-Dur, KV. 275 'Missa - Sanctus'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f36ecda41d43df244d92eb2074334b34a1ae374449a9ceef452fbd86c4c932e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ATP138528317 — a six-check JSON result.