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 0x46c685e6b836c6ca50bbed02e60925f89462589b6bc1e87b0337cb67ddb4ec11. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec4fbad2-f819-46dd-8359-c6d13c53308a.json and https://artists.proofprofile.net/proofs/artist/ec4fbad2-f819-46dd-8359-c6d13c53308a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mendelssohn: Organ Sonatas, Op. 65, Nos. 1-6
Organ Sonata in F Minor, Op. 65, No. 1, MWV W56: II. Adagio
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 0xd8461730bb83214ccc78ffbc63c6165d64783408837737be64feaf993c803d2f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USB8U1012020.
Organ Sonata in F Minor, Op. 65, No. 1, MWV W56: III. Andante Recit. - IV. Allegro assai vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86d0e2bb338a2e4153e534fa99251c4c271774276c5b19c7f6888df2b0070c1. 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/USB8U1012021.
Organ Sonata in C Minor, Op. 65, No. 2, MWV W57: III. Fuga: Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa166dca71c75fe18c1f9e165e2b29dbdad4c141465f351b6b0f79e7391edd33c. 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/USB8U1012024.
Organ Sonata in B-Flat Major, Op. 65, No. 4, MWV W59: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae82afa5a0b81f626dac029fb8438c45b59e76395e7da249611e231e568cd34. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USB8U1012027.
Organ Sonata in B-Flat Major, Op. 65, No. 4, MWV W59: II. Andante religioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234d6142f26380bbe1645c87460662cdd0bc4e8b4a1c1287e837662d1242163. 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/USB8U1012028.
Organ Sonata in D Major, Op. 65, No. 5, MWV W60: III. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce2f5529d16324c164f589783e3318a04301cc89367e29c50e6dff0b4c4f943. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USB8U1012033.
Organ Sonata in D Minor, Op. 65, No. 6, MWV W61: II. Fuga: Sostenuto e legato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b5a00c77e38c53cf1520596f1b89e371b65d6d0fafe1441883c017abbfd3d5. 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/USB8U1012035.
Organ Sonata in D Minor, Op. 65, No. 6, MWV W61: III. Finale: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc991d6d41545b38ba2266ba12e36f237aef72b44ad1f785e64fa2757c92d6e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USB8U1012036.
Organ Sonata in F Minor, Op. 65, No. 1, MWV W56: I. Allegro moderato e serioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19842918916f9b21bdc476f15760e29bd156c0fc0c6fc184acdc78682cbf56. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USB8U1012019.
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
Organ Sonata in C Minor, Op. 65, No. 2, MWV W57: I. Grave - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f31c0db83892da1b9d0f2bd00ae3d095b26dc18c2379cea5ca99626c99397. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USB8U1012022.
Organ Sonata in C Minor, Op. 65, No. 2, MWV W57: II. Allegro maestoso e vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea09b8b6b2e9b971255ec857e1f22e6d304d62b0f543b7da4e7f739109fbfea0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USB8U1012023.
Organ Sonata in A Major, Op. 65, No. 3, MWV W58: I. Con moto maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731b56354c205028550c2f4b0371aa172f31d56b16d0b97202890c2b5a7deaa6. 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/USB8U1012025.
Organ Sonata in A Major, Op. 65, No. 3, MWV W58: II. Andante tranquillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bd3417cab8784bc64f9a96a0c865972aa80e4a44a1d5d7f23df52e40ad5c9f. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/USB8U1012026.
Organ Sonata in B-Flat Major, Op. 65, No. 4, MWV W59: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2c5939087316c0949931585d2c6ccd6c36f7539f4763de9e6db866e229d253. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USB8U1012029.
Organ Sonata in D Minor, Op. 65, No. 6, MWV W61: I. Choral: Andante sostenuto - Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd330fae6708fa43f8e1eed09ee59a1264e4bf0a0ba968a0d5018c08d22711f58. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USB8U1012034.