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 0xeb58a8331cad1c6352f80ad4f74441daf9e8dcd65cb7d10a906904fb8f6675c2. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32715ba3-c972-4918-a56f-77a2f661b0f5.json and https://artists.proofprofile.net/proofs/artist/32715ba3-c972-4918-a56f-77a2f661b0f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
8 pieces for clarinet, viola and piano, Op. 83: No. 1, Andante
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 0x2c6c744f657fc29c432fd79db50377e4401285cd6f6e117e0d0d4a68e8e4814f. 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/FROV62233201.
8 pieces for clarinet, viola and piano, Op. 83: No. 3, Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157d8dbe53f0b0b4a8069b7a96ebc48562a39735f17e029bdbe135550813e77d. 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/FROV62233203.
8 pieces for clarinet, viola and piano, Op. 83: No. 4, Allegro agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c00355f8d4cd81739c1db01aa97a78eb0800ed5d306059a3889d8fb792b0a7. 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/FROV62233204.
8 pieces for clarinet, viola and piano, Op. 83: No. 6, Nachtgesang. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2698caecd936e61cf48019c4303337efd431e83948d1d8b67ff39e8a2a6d47. 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/FROV62233206.
8 pieces for clarinet, viola and piano, Op. 83: No. 7, Allegro vivace, ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b47bc6270629e51a592bcdd1e1467f0a8b25964d9bd9122bdc579e5f64beeab. 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/FROV62233207.
8 pieces for clarinet, viola and piano, Op. 83: No. 8, Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9637bba65baf0ff847006188f8e8aa690669884fbb4e27422f26540f3f4c72. 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/FROV62233208.
Trio for Clarinet, Viola and Piano in E-Flat Major, K. 498 "Kegelstatt": I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba132cfe2d14af3037461c316fad03e876e198bc1f0b8e443bfd42fca2acbfb9. 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/FROV62233209.
Trio for Clarinet, Viola and Piano in E-Flat Major, K. 498 "Kegelstatt": II. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b8f47599847ff64e7ed36d0a6f11dd5db11819f73a46e028552a37a74c82b. 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/FROV62233210.
Trio for Clarinet, Viola and Piano in E-Flat Major, K. 498 "Kegelstatt": III. Rondeaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1593fe6745a3a322dba0345ecdc45e773cf5192bf7901467e2ad67a2d4c730e3. 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/FROV62233211.
8 pieces for clarinet, viola and piano, Op. 83: No. 2, Allegro con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230314d18187295ae2c0ca21cbc90d81a7dd90001aec63421e9afe97ca25eeb0. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FROV62233202.
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
8 pieces for clarinet, viola and piano, Op. 83: No. 5, Rumänische melodie. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c67beb575837092320b97d0bce8d6c52a0d713f3ee98bc63fbb59c7cf10ac85. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FROV62233205.
Les plus belles musiques classiques pour les enfants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8394013f1bf1e6cb08eedd601bcdbbec719f95b90862ebf433d7faa171801c29. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR60Z1101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c9c74a689f4a25320b890ac9456a631614156714d6e52bdbb4d9c8d5b1d4e6. 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/FR2W62000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d55cb5dea27df318ab99be651010ea9b2fb358eb622961f4ade2ac1c81d929. 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/FROV61615302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ba7b5d885de1e6b6e86b5c85fe741797d62493f53d70e508866ec1a3c370ab. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FROV61718701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6297393d65b2d7c50841c4a373f180ed7121572800d096ed2040d657ec502a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FROV61718702.