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 0x3084074c75efc5ae5921d4a6c7e835f6a5c0a077b252e1dc3b51abb5449d34e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee354da2-0eaa-40a3-9751-b80fffa62cb9.json and https://artists.proofprofile.net/proofs/artist/ee354da2-0eaa-40a3-9751-b80fffa62cb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Étude Op. 11, No. 1 "La pluie torrentielle"
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 0x713c6716dc50d6dc1f0d163a372e8a4dc9126d43b2f63ef32b0c4cd526eb83aa. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA81984626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d30f372934cf4ca46f642b7c134ef022e0c742b787cf424d794d4a2ae043122. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42007920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf4895da6f022be07f4b9da68f6e30ffb82ce28ce9428a6bbc4f77f454e2ef5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ72023287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23786b01e7030ff1ade4216fb6f4366453b193e9c0f945b9534276e69210dcc. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN42035443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174ac9735ffcfdf29f413d5352c8b7e6041db358548e7f519a0834e470028b1d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN42035444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc413ecdf36aae6bfe6bf22da565897023616ae3166819beb9d67e92b5ebe2d68. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QM24S2010205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ed119a0407e9298172eeebe33729bad9183d1c1c53cc4f3104d01533a6226b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ52186177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604af4462b6c907115ecf03bc3ba7aba38dd96f0b84500c57a66fe71b1d706bb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ52186178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95805e1fc499d9ba437c85997f5bf4d7ac5e1033d1c4c963b37ff44a4f4cdbb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:14:56Z), 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/QM24S2105047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b375871aea8d042071b14291131b90629c7f4f57c5ea5c5cd5cc8acf016d39e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB92236186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe180b1e272f7a07df9e39f544b5cc3de623c1e58b6970848aee17b35262a112a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB92236187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77802c95a66c318dfa74b4fa38b9517cab8a14a270030285b3392f1d70e02850. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB92236188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea050955b2a86c5896fcfdb108a9b654f0e249a5cb1caf14f2d3f5262a5711d9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHN92432035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d017b36b7be9e44973c685eccb6dd38bb71985b77b4f54c4ce37c8f7d5d39b8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2429418.
When She Whispers She Tells Secrets (Musicbox)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae7dfadb708d44582240689fe23431750645af284f34d8eb12aed663aa2eac7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:23:10Z), 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/QZNWU2464841.
Nocturne No. 4 In B-Flat Minor "The Hypnotist"
Impromptu for the Funeral of Franz Schubert
The World Falls Apart When You're Not Here