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 0xafbe722baddd35bf8a5839d31cb6d403b02c716922a7e145c58dfc2b40168d6f. 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/7017b51f-2986-44e1-9cb0-858f3c9d61f9.json and https://artists.proofprofile.net/proofs/artist/7017b51f-2986-44e1-9cb0-858f3c9d61f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Quintet in E-Flat Major, Op. 44: I. Allegro brillante
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 0x3e851a60e55abbe6d3167dd82a018cff3ee322f2eae028a6d76e2c99d3813474. 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/FR7JM2160050.
Piano Quintet in E-Flat Major, Op. 44: II. In modo d'una Marcia. Un poco largamente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9280ea6f5e007fb1efcba5158cfe7486c1b543f609470a2e560bb3b47c5108ed. 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/FR7JM2160060.
Concerto for three violins BWV 1064R in D Major: Concerto for three violins BWV 1064R in D Major: I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9051543801290a811d9f05fc94d1243a46a21341d15a513c495308ab46ce4e4c. 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/FRZ141208100.
Concerto for three violins BWV 1064R in D Major: Concerto for three violins BWV 1064R in D Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9c81dee42d4117c9c3bb564d0fac3ee38f7c8530cdc4ef7f41e7843462382a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ141208110.
Concerto for three violins BWV 1064R: Concerto for three violins BWV 1064R: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332fab1e5a538a9d134690fcb2bbb5e7d24a82fb1afecfc08050af3fcf800be2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ141208120.
5 Minuets, D.89: No. 3 (transcribed for octet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb152bd79dee6e98d9185e153e4c8ef53904ae1a38d3390c3011d18d4dc016e6e. 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/FR7JM1747070.
Piano Quintet in E-Flat Major, Op. 44: III. Scherzo. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10838d8aac4f62bb38eaa899c1c2dae4f4ccc7c240681b4a8deefb89d11e97b5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:01:10Z), 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/FR7JM2160070.
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
Piano Quintet in E-Flat Major, Op. 44: IV. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be479885034815e8de0bbe7f1a594efac7c9dbce73e53542cb62568fe0c62df. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:41:41Z), 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/FR7JM2160080.
Schoenberg: Violin Concerto - Verklärte Nacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6256d315be59e41eed78cbdd5320dfb0f27906bbc1eef1f476488db1a4f8ad08. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/FR7JM1880040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a84914071841df981d9d524975058abcf90e0b3b01bb60affaf2c8ad2b445d. 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/FR7JM1880050.
Verklärte Nacht, Op. 4: III. Schwer betont
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fafb1195e12246d7e56a31268618dc5bcb24de2a9d98a9fcb354de21d95f2c2. 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/FR7JM1880060.
Verklärte Nacht, Op. 4: IV. Sehr breit und langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b409d7eb3333238b9ba2140de7d5c4661b925b25715ad2dc8f9a0ab4e794ad. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR7JM1880070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b97204f07a8b5b5500b3f647be3c6339668f22cef92606dcb59b5260d807ab. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR7JM1880080.
Octet in F-Major, D.803: I. Adagio. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adc8b4b7c20593dc1632681149ce1e59998e66d523a2501934233325a82d12e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR7JM1747010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45efc158f1762c4a6a569f88ec5a07b4834513b679fc11c551ce8dc84fb808d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR7JM1747020.
Octet in F-Major, D.803: III. Allegro vivace - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aff17320c6a766bc8c450a12234a24f685def50e3c357d276a9c86115b8550. 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/FR7JM1747030.
Octet in F-Major, D.803: IV. Andante - Var. I-VII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1d2317f3a15b26233d440268797b7c43059a04d26b52c44c6f97f0f404b16e. 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/FR7JM1747040.
Octet in F-Major, D.803: V. Menuetto. Allegretto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1251b5a77eb0a7a2cdedd53e1c475d1fe38eee397260fd4e2449d3622044c0e3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR7JM1747050.
Octet in F-Major, D.803: VI. Andante molto - Allegro - Andante molto - Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0168cd48145185fa9c628c1ca477ebdf5fff44e8505f3a613793e7ff15963f1c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR7JM1747060.