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 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 0x3e204e77978247bf37c4acf5659d059f8dc8c18c4fbb12c4e5b072821339033b. 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/5a8dc554-77d6-41e9-865a-64f6207bafd0.json and https://artists.proofprofile.net/proofs/artist/5a8dc554-77d6-41e9-865a-64f6207bafd0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liebestraum No. 3 in A-Flat Major, S. 541 / 3: Liebestraum No. 3 - Klavierversion
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 0x4771cb8663e0ab03a470bc647c66dc19057fc8d01ec395bc2bbae073105bb05d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/CH6542375636.
Klaviersonate No. 14 in Cis-Moll, Op. 27: Mondscheinsonate - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66a05f4c631f5b5bc2bb12391addebd0be83366ae408911ab63ab9ecbe2647. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542375637.
Prelude and Fugue in C Major, BWV 846: Prelude and Fugue - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522f7feed0d405e403b4b171f5e7a498c8a4ae4640704313e30c4e18b4f27ce4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CH6542375627.
Für Elise in A-Moll, WoO 59: Für Elise - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa148686fc8e9156192fbc055adb1edb7c487c6c05f8587b89042881deb96f863. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CH6542375635.
Nocturne in D-Flat Major, Op. 27 No. 2: Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb430937b1c31089de55f0b6a8554c2021a95153b9767e583a20a8ed9ceb4b0b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542375632.
3 Intermezzi, in B-Flat Minor, Opus 117/2: Three Intermezzi - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5360928a57b6854b7dd506b00a06676de990bb097f5361117c842e89066da85b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CH6542375631.
Klaviersonate No. 26 in Es-Dur, Op. 81a: Les Adieux - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19923327be5c1b183d7cebc2d11501f61b22ad09d52ed78bed49d8bb20d0651. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/CH6542375628.
Klaviersonate No. 8 in C-Moll, Op. 13: Pathétique 2. Satz - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257974516484cbd0c72be0406f9bdae4637ae19384b9262c8a6e15c1c1e30961. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/CH6542375643.
Sonate No. 5 in C-Moll, Op. 10 No. 1: Klaviersonate No. 5 - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ec5016d583fd4305541b11671d4ce9fb8fdee812f950642e2c0f8d74b167bd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542375629.
Sonata No. 11 in B-Flat Major, Op. 22: Sonata No. 11 - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831efbcee25a7f58777abc909c5309f38dcef9051e05776c80536b61474efadd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542375630.
Prelude No. 19 in E-Flat Major, Opus 28: Prelude No. 19 - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab47203c28ec3fb6980f1d386e48ad05ca1994f2fd370247bfbb5a65fbaddb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6542375633.
Sonatina in C Major, Op. 36, No. 1: Sonatina - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd757f6f75de6d6e4be85cccb469a6d0cff7c990206e6dfea789743a5baa9d0a5. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/CH6542375634.
Sonate No. 14 in Cis-Moll , Opus 27/2: Mondscheinsonate 3 - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4c47cf0c3fe9c5195961df69cabd098eebbf78ee5097d5c80a60decfa2997f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542375638.
Klaviersonate No. 10 in C-Dur, KV 330: Klaviersonate No. 10 - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c9a5a184131d512ae2a42d5f6833724aefdde0736f0cd52d034855c5e139fa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6542375639.
Sonate No. 11 in A-Dur, KV 331: Klaviersonate No. 11 - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac502b46bf95006bbe07a6f80b64bfe3045d63dc2f0452513d881fdd127f74. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6542375640.
Klaviersonate No. 12 in F-Dur, KV 332/300k: Klaviersonate No. 12 - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e340efafdc5d29080de46ebf5d476423f91baa46f2ccb23b8d9510660787c93. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CH6542375641.
Sonate No. 16 in C-Dur, KV 545: Sonata facile - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e59c9ac0a1b2a3d54c839f7ea46c231838575454a3ad58223a466e61dfe12b2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CH6542375642.
Klaviersonate No. 8 in C-Moll, Op. 13: Pathétique 3. Satz - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352342dfa1fa17eed932bc3b71dbb02bfa2630bcf7b35197b5680222c0628e98. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542375644.
Impromptu No. 3 in G-Flat Major, Op. 90, D. 899: Impromptu No. 3 - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ef17c98497fdf54a8ed6224d158fa91a9a0629b5bb16b1d7c88aebd2fb0e9c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542375645.
Die Jahreszeiten in G-Moll, Opus 37a: Juni - Barkarole - Klavierversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aaeb88e633dd68c4cf61bab359533c9ff80203fc01dd07cad435b07d35c8df. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CH6542375646.