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 0xb529836626f0ab04b2d022fa04e7b95f43af7562240950ad2847cb1c32643117. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d25ee3c-2b42-4261-804b-f40afec4c241.json and https://artists.proofprofile.net/proofs/artist/3d25ee3c-2b42-4261-804b-f40afec4c241.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x2009d404b4ba25f5737e0bf2fce9965c4b52267090af4ec4cd43ea4c45160b71. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:29Z), 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/HKJ962001411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6234c49b312c8b9adb9ec03ec57b3f564dd7f5539e001005b6fc689a0e25e1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TWAE32204795.
Orfeo ed Euridice, Wq. 30 - Arranged Sgambati: Melodie dell'Orfeo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1adbd7eeca72146a8d6e8c84c010a55eed74fc065b2df2d7e1d7f0cbe282bb. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TWAE32204796.
Prelude, Chorale et Fugue, FWV21, II. Chorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a223aaa9d8cb4e3df676e8b0bcc4a5ee64a3d2ac92978495bace328d8f3a602. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAE32205080.
Prelude, Chorale et Fugue, FWV21, III. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695e84aaac9710091c7ad8aaae39c9ed4d3b7756bfd8a148bc2dc59ffeed3d04. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAE32205081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29715871057a93f8ce5bd11041fa770f55b6e5a78be9cc5ea0708a6c83482eb2. 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/TWAE32205083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff88f88fe2523d1e325f27210a4a361ea5ba32d82fe83b3e222289ca7e213e0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAE32205084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e65f71432f27db702eb8e681a97e334d8a1a142289d0bbfe359d53afc89fc1f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:28:03Z), 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/TWAE32205085.
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 0x2d215b5990b8a553baa75446b3077df3428b1d4636601afb3a10a8ee92ee8b50. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWAE32205075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173f5dc0e12eb80f7e98c2b0b19573ee7e087c11223da8b1dbc55354ea023ec0. 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/TWAE32205076.
In festo transfigurationis Domini nostri Jesu Christi, S. 188
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c6a7ece369a7cfcf43f37bdab282eef5a37a52e98a28d120a82e2697adc451. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TWAE32205077.
Be'ne'diction de Dieu dans la Solitude, S. 173/3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ff38958f04772518240bc5518e8ccc47eadd524f807ffc607a505abcce109f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWAE32205078.
Prelude, Chorale et Fugue, FWV21, I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c899610b06b5dc7f381e4f6c76d174a502c578bd83a9fb5598287c5fdfd181. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TWAE32205079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85de28bedd53d429167ade7550a802ce40d3d489bac7b95aac665b6b8c15f6c. 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/TWAE32205082.