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 0x7529b60a2c80e445d82744510916c38d85636c5ca3b7dabf4c22e9d2d7c70627. 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/3b4e93ed-5642-4825-9d1c-f7242f330a21.json and https://artists.proofprofile.net/proofs/artist/3b4e93ed-5642-4825-9d1c-f7242f330a21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chopin: Nocturnes Op. 9, 32, 37, 55, Nocturne in C-Sharp Minor. Lento con gran espressione
Paderewski: Piano Concerto / Danses polonaises
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 0xff0d354ba6214ae522a27230048e7c36621fe3f9667a6d35160c0ec3734c4a9c. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/PLC701705101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1517f13b2dbd9ebbfba7a07dcaf82c8ac77309b050b039ce71d38b75bf79e9. 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/PLC701705103.
Danses polonaises, Krakowiak in E Major No.1, Op. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaec0d7f8d610e61fddbe2ac2baabe0bdb339827b4e15fccc6dbbd7c44f6f4e. 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/PLC701705105.
Piano Concerto in A minor, Op. 17: III. Finale. Allegro molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7522dcc1dae509cc5588b740cf015b83e8936b7815ecae65e84d7688a6af211. 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/PLC701705111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced5da376f510cb49edded09c983ef8b24935c3cb9571cf53657d5fc44726626. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPVI09002780.
版画～第2曲 グラナダの夕暮れ（ドビュッシー）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468efddcdafdb7074dfc62b981fa065a49fb62f3ec0b5f4d0a415cc557388eab. 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/JPVI09002790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5709cda9f34f28f2d3697ceb82358ab7f86956c6f4840dce8fa7ecf810f2bbe9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/PLC701705102.
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 0xcc89c1d5ae72f1bae110c3232c9bf14f5fd15295a81ed0de2a284cf3095d2f17. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/PLC701705104.
Danses polonaises, Mazurka in E Minor No.2, Op. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d2f768dc048c2fe0cb63395dd36d7782f15475f12eaa9795b864d89f73d8ce. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLC701705106.
Danses polonaises, Krakowiak in B-Flat Major No.3, Op. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873263ae8282eda599814330b56dbf7a51aa0a7fda199d0b7c041b4dda4c5a90. 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/PLC701705107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a46c788f849613d6358d2ba5293e11e3a2f9f4ab4ffc9adc93d28523d0de096. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/PLC701705108.
Piano Concerto in A Minor, Op. 17: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a14fcba5da6a2463ad0f2bced4649e6bf5eba564dbf20539745b1b2daea205. 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/PLC701705109.
Piano Concerto in A minor, Op. 17: II. Romanze. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93485067bbb1401375e401e09a62b90f64c01c4a2a80672e988ccd3a29e47f06. 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/PLC701705110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa7948944c34c5b67891af61c0f3fd0c4f48e068d73e2e8baedc3c02afb74d0. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/JPVI09002800.
前奏曲集 第1巻～第3曲 野を渡る風（ドビュッシー）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadc754c32f45652ad203b9e2e9b78520c9bc98d5bbe47a7e660ef4e9cd52e50. 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/JPVI09002680.