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 0x4461ae2bd87655ef3469af1cd7ff2f50c49fbc4feb3d46a767e8c0f40c056c9c. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f9dd2aa-6366-4e9a-b846-cb2776bacb1a.json and https://artists.proofprofile.net/proofs/artist/2f9dd2aa-6366-4e9a-b846-cb2776bacb1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Spatzenmesse in C-Dur, KV. 220 'Missa - Gloria'
Chor, Solisten & Orchester von St. Augustin
Spatzenmesse, Orgelsolomesse, Loretomesse
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 0x11324c71af9436ae937117be506f9f311faf6ec59b26d215074775350251c563. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ATP138528302.
Spatzenmesse in C-Dur, KV. 220 'Missa - Credo'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9e4ba3d030ef8e9de76268b2cf1aac6b3198274d2c04526fe72a0b8965f6d5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ATP138528303.
Spatzenmesse in C-Dur, KV. 220 'Missa - Benedictus'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6023814711716fd0db3aa18e48a7a7eae5d58b18200e549efdadd698cf76244b. 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/ATP138528305.
Spatzenmesse in C-Dur, KV. 220 'Missa - Agnus Dei'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bed9a9887d49ab9dd9e6fe966252691e6d3a70ccd8f6129f4aca9eba223445. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/ATP138528306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb620d2c364953db07f86fc42830cb1641b826abf9d8e34124c5d1f6e43941d09. 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/ATP138528307.
Orgelsolo-Messe in C-Dur, KV. 259 'Missa'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4a9a0f4a98d6c29c572e37b26e5b698b901de3e022c1187f29e0dec959ca76. 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/ATP138528311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c118fe1a31e6596904e5374ca89d54c5c7e0f71d51e9b529c17d983a07505c8. 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/ATP138528313.
Spatzenmesse in C-Dur, KV. 220 'Missa - Kyrie'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3525473ffb660bb4bcd5dfc8a31be594f440433f702690c98245764a0d1bf6. 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/ATP138528301.
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
Spatzenmesse in C-Dur, KV. 220 'Missa - Sanctus'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3ab526d42237484a9f45745d96e9aa6bdbe4866afdad7259fddef10f220ba7. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ATP138528304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c2cb1dca4e992b27e7cd4312f5a0ec0567524fd49552c8814ef0bd0a523bd. 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/ATP138528308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0b9da55a3485302a335ac99991bb7978df02569ed3fa92ebcd086f5a059521. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP138528309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf719ec894e118482093c2f8774bf6528efd4742d815ebbe7d6795c3eae47d3a6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ATP138528310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4003df457b4288ae04f03b16e970d088024b92bfbc9d9cc5fa4f3eaaf6e69e91. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ATP138528312.