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 0x8441b2f21bf52ec03d3bd8b464cca15b2f756a5f6f21128170f294929689c366. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4c391f3-5498-4853-a6f5-a4248684b554.json and https://artists.proofprofile.net/proofs/artist/e4c391f3-5498-4853-a6f5-a4248684b554.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Visions on Fugue: Buxtehude, Bach and Reger Arranged for String Ensemble
Lachrimae or seven tears: Lachrimae Amantis - Arr. String Orchestra
Stabat Mater: Tallis, Dowland, Byrd, von Bingen and Ruiz del Corral reworked for choir and chamber orchestra
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 0xfc11a33c8a35fd9b60699354959ec6b3259d1a5f9643026cfe37318534054552. 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/CH6542260896.
Gradualia ac cantiones sacrae: Ave Verum Corpus Natum de Maria Virgine - Arr. String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c4de3323540c2588661f355b3c115a748a902ac96ed335b0357fe3d9ed35f3. 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/CH6542260895.
Ave Generosa: Antiphona I - Arr. Chamber Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d6999e04d855a722f88b16cc483ef34aea82dbeedb82d67129682472138056. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH6542255717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6ab484e68c6c37c38385820a30f35b7b47381706832906d0df3ae63778f6e. 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/CH6542234943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d2a803dfb636861bda7cf52bd8762921854e1156d112db27f037e9b506d66c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH6542234938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1a9b39073daedee12ae8e51eed1c5da043a3e785dbeaea0289ff43178a6ace. 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/CH6542234939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8782cc70ba5516b06de053edff3122a144f32e08c730e64047ffb11ed9313ec3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542234940.
Tudor Motets: Gloria Patri - Arr. String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e686cc348fbfe05f69609b74fd63fb5dbed411e352fffe3320067f9914c5114. 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/CH6542260897.
Magnificat: Choral Works of Nicolas Bacri and Manuel Ruiz del Corral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6ab484e68c6c37c38385820a30f35b7b47381706832906d0df3ae63778f6e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542234943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1a9b39073daedee12ae8e51eed1c5da043a3e785dbeaea0289ff43178a6ace. 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/CH6542234939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8782cc70ba5516b06de053edff3122a144f32e08c730e64047ffb11ed9313ec3. 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/CH6542234940.