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 0xb2631a19b5a84ff2626e4aee83a28563913578b0090f06222f18366b622d3dc0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3c999e7-d853-49de-9164-d7c0426673c6.json and https://artists.proofprofile.net/proofs/artist/f3c999e7-d853-49de-9164-d7c0426673c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
5 Elizabethan Songs: No. 5, Sleep (Arr. W. Newell for String Quartet)
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 0xa2f29a350c343b2576b21a0b0155233263b0d02ba71f738834c7e29f5454b51e. 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/GBYDS2100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a81589d087ab4be03e05517c18370e6a9a31dd75a4c76cae7d190983cc33663. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:00:52Z), 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/GBYDS2100231.
The Four Quarters: II. Serenade, Morning Dew
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749496c75774b60139a67200414037b4f4367922fefdd2d33d427316cec8ce5d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBYDS2100233.
Summer Moon (Arr. W. Newell for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec60ba142ce3d47595490664c21e9bb8e0ec649e8fc26880e7ed2bc17875834. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBYDS2100238.
Child Falling Asleep, Op. 15 No. 12 (Arr. W. Newell for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a7d2d147fbc97a0998188efc01e42939af232c1dd6c7e05c4c75204a19ff28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBYDS2100240.
Tuoretu: IV. Easqelä (Suspended, Spacious, in a Dusky Half Light)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11e98c899abae222d7c1c38de7b5547a61add288a12475f528c46123c9c237a. 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/GBYDS2100241.
And Dream of Sheep (Arr. W. Newell for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90075d859d5a1e35f434f33b1718e599b73724eaa1f88e17df485939340a09c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBYDS2100243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19e3dedcc5bb5b4d8e3756fcd7559c5c509010919967e363d8cf525df73403a. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/GBYDS2100229.
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
Ca' the Yowes (Arr. S. Tress for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c8c1b07866a846e3c157c5354331f36f574f975a3daf59716bf7a30c17fb88. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBYDS2100232.
Now Does the Glorious Day Appear, Z. 332 (Arr. Amy Tress for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f472de8705993ab8fd07a9eb53dab42d5dfd93a096cf29f2c874e9224c80c6. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBYDS2100234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c5c69c184d55f12e439fecbc7ce21f2ad9bea7d1527ed029dd4446348f5716. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBYDS2100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659f25bf787dcb8186d9dbbd7721632482166bfaf6325904c7e55f5ee0beb042. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBYDS2100236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0145ade53ee3efa2ef50ab26b59f527f9e21b9ce6779c2a2e33faeef266945b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBYDS2100237.
Evening in Transylvania, Sz. 39 No. 5 (Arr. W. Newell for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26020e7059c4d4e5c9ede6f491fd092aa6cb0919605d59fc02c7d1d39dcd9d50. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBYDS2100239.
The Four Quarters: IV. The Twenty-Fifth Hour
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dba9461215df351b29fabcc6724822790c0027165d135085662120ca60cf377. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBYDS2100242.