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 0x0f943d72fe2470ff120e567d9246978b9ff4183641d09ad9c68a821438d3090d. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7869215-0de3-4529-8214-2c49b13efe44.json and https://artists.proofprofile.net/proofs/artist/e7869215-0de3-4529-8214-2c49b13efe44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Première Rhapsodie, L. 116 - Pour clarinette et piano
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 0x82322f5b6519c7b27eae293207c776b438fd85ed5e6504abd8af6474fcbbc4fa. 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/FR9W11419237.
Carmen: Entracte - Fantaisie pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdc120dab81b629ace2c3a5c5eaa7680c4279c49619a3f7c693bbf906c7343f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR9W11419238.
Carmen: L'amour est un oiseau rebelle - Fantaisie pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d5ec87b58988adb267febd5f00b7cd77d79c5b8a39e6930be81f775aa34571. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W11419239.
Carmen: Près des remparts de Séville - Fantaisie pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32ee5172b6629589863ae482beee47bf6d5e0823f30b7090f609827605a279b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FR9W11419240.
Carmen: Les tringles des sistres tintaient - Fantaisie pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bf06af8fd93542b49c9a0d682fd0f5bfad60629ad07cac10cfa885375fc2ae. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR9W11419241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1ebb513971b120b87e4de738497cbc9aa69fb3078618e1927b85fa43725891. 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/FR9W11419243.
The Nutcracker, Op. 71a: Ouverture - Arrangement pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad010cd42467bf9c4c253686d14fcecefca3d722ee30c01fc370a00a178fda07. 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/FR9W11419244.
The Nutcracker, Op. 71a: Marche - Arrangement pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda451d72434423f5d882b5fb46ded489f88537cbac01dba3777b3fcf5281312c. 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/FR9W11419245.
The Nutcracker, Op. 71a: Tarentelle - Arrangement pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef0fb2fe5b8a65569065f939b4edf2498cdf8bfb1071c54eb3cf633aa5c543. 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/FR9W11419246.
The Nutcracker, Op. 71a: Danse de la Fée-Dragée - Arrangement pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2443001a41d6bc4f5ce52e7f14401823a681ab3461673fb27a31ec5a3bc6db4f. 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/FR9W11419247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda279381fde544a9669d1682ed304c0f9a8bda78b1271f24bacb591f010d9f2. 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/FR9W11419250.
Sonate, Op. 167: IV. Molto allegro – Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d6580e5aea801a1b413abfd7be0682d3fb7c6914552c73c2072ab2e39d2e51. 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/FR9W11419253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf9ba56bf778ac06efb92be936a539aceb0659206eb0e905cf0dc57fecbb25b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR9W11419242.
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
The Nutcracker, Op. 71a: Trepak - Arrangement pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560181307c65abfecd0e2d3134836af9bafd9376b2d2fa61ba6c704d0254583e. 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/FR9W11419248.
The Nutcracker, Op. 71a: Coda - Arrangement pour clarinette et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4632d927941efc354d263272e63be6e134fd3cf72f1d50a3ebed25452b6090f1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR9W11419249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5696d47fc2a99230a29dd458ee7f9805c4f5d75929ad7746da9d5c269d8285. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR9W11419251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7054a992e0791937c04025c2f73a3e827556463a8331f1607adf36b9ba0afe. 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/FR9W11419252.