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 0xd7e1d75d8295af28a12da6609aa790841767c991944946fdd011648664b1dbd5. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/295a4222-814b-4a28-8de6-855ee02f8c8b.json and https://artists.proofprofile.net/proofs/artist/295a4222-814b-4a28-8de6-855ee02f8c8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Requiem in D Minor, K. 626: VIII. Lacrimosa
Südwestdeutsches Kammerorchester Pforzheim
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 0x143af41e3cdd004c0963a0a0a449ddb41639251291754d5ed4b89b4daca05c8c. 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/NLY331411359.
Die sieben Worte Christi am Kreuz für Soli, Chor und Orchester: Pater, dimite illis
César Franck: Die Sieben Worte Christi Am Kreuz (The Seven Words of Christ At the Cross)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa761e6e99ed253ab73e4402cab19bea802084cf307ca572384303ef6fbb801f2. 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/DEE219343202.
Die sieben Worte Christi am Kreuz für Soli, Chor und Orchester: Amen, dico tibi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc85041e1e72ee84f9100c42369933a684ec00708ab1b5359170ca71c050037. 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/DEE219343203.
Die sieben Worte Christi am Kreuz für Soli, Chor und Orchester: Deus meus, ut quid dereliquisti me?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237bd8a7ae9bbabc23c20f8b2b5c06a7a4049ebfae56e4ece9743f292e72adbf. 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/DEE219343205.
Die sieben Worte Christi am Kreuz für Soli, Chor und Orchester: Sitio!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d543da8e8c15f204b2fd314ad02dd5e1816c717dfc02cedf4fbe4f4f3086792. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DEE219343206.
Die sieben Worte Christi am Kreuz für Soli, Chor und Orchester: Consummatum est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a4d0c4e1cc4c18ccb66470f5cb598c10f4bb69c294538e11b99fdc7ea9c16. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEE219343207.
Die sieben Worte Christi am Kreuz für Soli, Chor und Orchester: Pater, im manus tuas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe424b7aa4ed3afc413c4af310c777871a7956cc31fe4eef86858b6605e79349b. 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/DEE219343208.
Die sieben Worte Christi am Kreuz für Soli, Chor und Orchester: Mulier, ecce filius tuus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a6564bdc3983572fb3976b2cee24ffcbec62dda07d7b13a09820fd2751a5f0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEE219343204.
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
Requiem in D Minor, K. 626: III. Dies irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e8dfcabecdc208638bc691deb66e907eef120bcf20335d61064c57c2d5a2cc. 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/NLY331411354.
Die sieben Worte Christi am Kreuz für Soli, Chor und Orchester: Prolog: O vos omnes, qui transitis per viam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3e7e4efb71f85bbad681a866fb4f7954d09bcf9b5da8e36ee677a251b1301. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEE219343201.