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 0x11d71b9bbf48e7100a423b4fc22d80d0f8ab000bbfa27238d7438cc6ee371e0a. 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/70aaf786-c88a-48a4-9057-14c1d649b8c7.json and https://artists.proofprofile.net/proofs/artist/70aaf786-c88a-48a4-9057-14c1d649b8c7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Josef Gabriel Rheinberger: Cantus Missae. Musica sacra II
Mass in E-Flat Major, Op. 109 "Cantus Missae": I. Kyrie
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 0x80e6ceab8c5cafac141b1b08c3440b7bc9b913ce93326bd21c346c3db0bbf8ef. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB118900101.
Mass in E-Flat Major, Op. 109 "Cantus Missae": II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9834fb8243dae42b394ca791982c9df292de5659a4c6aab43210da3665dd1f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB118900102.
Mass in E-Flat Major, Op. 109 "Cantus Missae": III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd9bcd72e8580b20fb0d81a97e5c2cd4f851d4b213a2a72e8bb9c935a74b295. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB118900103.
Mass in E-Flat Major, Op. 109 "Cantus Missae": IV. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6dbbb62f0eee6da82e4b4fee8cefec21054296b5041453b96076f79e988914. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB118900104.
Mass in E-Flat Major, Op. 109 "Cantus Missae": V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78c69811f8d66e99003b3dd73f253c2e6846a0dc47acc3f62b59b8a97ac481f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB118900105.
Mass in E-Flat Major, Op. 109 "Cantus Missae": VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cca46806519e38567f966a4345caf42b43e1d21e2d94fd07ef2400553947748. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB118900106.
Wie Lieblich Sind Deine Wohnungen, Op. 35
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b746cc3c39aa52b6c2d86e41927d3471d2a999ba2ecf317b4a090abd7ee41b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB118900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc90176a8a8900f60ae6a197a2046ddb13e212bfcd13951a199ef970e5795f0c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB118900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634e5261139b05b5fa515b1290c5c4040dcfa052d004a4e6103643dac0177501. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB118900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671ee0d2708e022afbe19a0fdc5771fb225147af0b3bb5c8547f294618943564. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB118900112.
Geistliche Chöre, Op. 69: III. Abendlied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077b8cacb7da984327ffb90ab6cb54102e872a5c2523f7fa2d9fe8a4aec92b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB118900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fb31765014f16c81acea379ebdf78f594c4db150c5700a5b6c037d53634631. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEB118900109.
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 0x94d84cbb3c72653475e9636758b79ed9d4166e8fdeeceaff0c7b402858bef2a7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEB118900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed27e58e0fc164b66eb78533030efc298fafc4fbf3e9100eae3176f84867c890. 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/DEB118900113.
H. Wolf : The Works for Choir and Orchestra