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 0x02c75891dcb36cc99bea669a12c245d23542441a1c31e07cd61a87c95d632d53. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df92d359-0990-4dcd-8432-a9bf38620302.json and https://artists.proofprofile.net/proofs/artist/df92d359-0990-4dcd-8432-a9bf38620302.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ich steh an deiner Krippen hier, BWV 469 - Arr. for Brass Quintet
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 0xbf84ec8d7efa26085492418e1483907c25d83d2cf9f64e81a06e3edeb7088a2b. 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/DEPD50200513.
In dulci jubilo - Arr. for Brass Quintet and Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cc2059688108b0077bc8497a258b5e52959253be85ea0d0ab929fa791cf405. 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/DEPD50200516.
Wie soll ich dich empfangen - Arr. for Brass Quintet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8acb76dd0870ae461665a58e54042d68c4ed1c5020d5838a19e8d068d1cf5f8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEPD50200508.
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
Albinoni, Gabrieli, Arban, Pergolesi & Verdi: Concerto Italiano
Canon in D Major - Arr. for Brass Quintet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5cc1ef13a1de1fad0ec676db812b400d9687ac017651735291437e2de17cbc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEPD50802306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728fc7d8ebf85e12a3fd74bba53c462a38b271923aca19dfbd5c3d4b4f3c7b05. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEPD51002505.
Handel, Rossini & Vivaldi: One Day of Music
Bach, Telemann & Hamlisch: Brassical Dreams
Handel, Bach & Jenkins: Highlights in Brass
Salomon, HWV 67: Der Einzug der Königin von Saba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f13bb0e54fef899f8d44e92fe40d9b43e987bdbd4ff690870ea3ec2c3ac10e2. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/DEPD51403105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d00643946b3b61beb1013f777d095caa72c3faa420097e8b6b503b4f910aa6. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:50:16Z), 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/DEPD51403106.
Ouverture-Suite, TWV 55:D1: 3. Air: Vivace - Arr. for Brass Quintet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d148fe6046eee57640780c8d990408a556a74ab219560012dcec1a86f8ddca. 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/DEPD51703404.
Ouverture-Suite, TWV 55:D1: 4. Air: Allegro - Arr. for Brass Quintet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d2643b6de9119591ec5d80fa2c8bf9bfcf986e7d28a53a454c53f015c17178. 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/DEPD51703405.
Die Zauberflöte, K. 620: 14. Aria: Der Hölle Rache - Arr. for Brass Quintet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e02f09dc858ab7f34ceb858bf7b7c7822e766a000d9771c7fe46f5cffae37f. 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/DEPD51703408.