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 0x361559a01b162f576bdcd132fd212273d0a4b5516c2b1d6643edeb63c4b81509. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/230562ef-2ddd-4dbf-9c49-62799fc08ab9.json and https://artists.proofprofile.net/proofs/artist/230562ef-2ddd-4dbf-9c49-62799fc08ab9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Trio No. 1 in B-Flat Major, Op. 21, B. 51: I. Allegro molto
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 0x8255a4c9a1a558a21a360931f2194773ad08095cb8a425077d98361be15d4090. 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/CZA162201509.
Piano Trio No. 1 in B-Flat Major, Op. 21, B. 51: IV. Finale. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b54b77fe9513f06df6578552826f0e2fbe51b6ac18ddb7e090c28549013b09c. 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/CZA162201512.
Piano Trio No. 2 in G Minor, Op. 26, B. 56: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731fa3b7c2108a2fcaa1e81d52d33b2c37c473ddf3d4200d0f8fa9e10f142986. 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/CZA162201514.
Piano Trio No. 2 in G Minor, Op. 26, B. 56: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3e6f5e7ceba37e39db4fa3eec5af0f9ce7e2e6be4275d9665a8fd31b67753a. 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/CZA162201515.
Piano Trio No. 3 in F Minor, Op. 65, B. 130: III. Poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c84167c0ddd51fdc6faa171966156b5815e039924b4f6c4e142e2b3963a12. 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/CZA162201521.
Dumky for Piano Trio, Op. 90, B. 166: V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7513f738f516a99c7ab6a374a0a2d3b4f859d0eb6b28331b555f1d331d142af0. 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/CZA162201528.
Piano Trio No. 1 in B-Flat Major, Op. 21, B. 51: II. Adagio molto e mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39378e9ac67e7608edd5fe60f00c10272a0c25703e4f1132de2ec1e045daef56. 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/CZA162201510.
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 Trio No. 1 in B-Flat Major, Op. 21, B. 51: III. Allegretto scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39978def9f054fd0b85dc3e80ebae31603f8c49a7ff63b289a2661d25b7067b2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CZA162201511.
Piano Trio No. 2 in G Minor, Op. 26, B. 56: III. Scherzo. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b90afb074841ce6a60465abc59fba5392abb2b4ff0ac03a47f6be940c8ab94. 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/CZA162201516.
Piano Trio No. 2 in G Minor, Op. 26, B. 56: IV. Finale. Allegro non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14de426d45c9dc4f028ccf068f8ebbf5b0cfff17a2608f40723f1de46d9642b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CZA162201517.
Piano Trio No. 3 in F Minor, Op. 65, B. 130: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164e5e578292e29c193e800f1967845d8aef7e24015de284b22195765fdbc17c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CZA162201519.
Piano Trio No. 3 in F Minor, Op. 65, B. 130: II. Allegretto grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9bf3e276b8127d4240e1a3612cb5bac3e78419712e9f6d20961c3a9418b7f3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CZA162201520.
Dumky for Piano Trio, Op. 90, B. 166: I. Lento maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb0dce84dbd0681851694a50548073d2c96d3556cb029428dba543e46c4c983. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/CZA162201524.
Dumky for Piano Trio, Op. 90, B. 166: II. Poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9144e22ad6a1c5ec04fce5dd3f903549ec898ae6bc34b01019d0e7199ff16e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CZA162201525.
Dumky for Piano Trio, Op. 90, B. 166: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84437c822b6d4ae2c5d6f6d7fbd67ce5816d8a2ac19e1aa2c0b8ceaa8cc30f2f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CZA162201526.
Dumky for Piano Trio, Op. 90, B. 166: IV. Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f2520db7f715c688653d2da7c2bed1af71c9e85b982aeb1086d6fb88373ab7. 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/CZA162201527.
Dumky for Piano Trio, Op. 90, B. 166: VI. Lento maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e774e74c2dfbafea39920c1f167d99fae4234bba5d8e551156de734fdf505. 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/CZA162201529.