Mela Tenenbaum was a classical violinist and violist, also playing viola d'amore. She performed with the Kyiv Philharmonic and other orchestras. She inspired composers such as Dmitri Klebanov to write
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 0x6da2dadaddb0f0fc3943eadc191a0de002a408bdcfdf583ff9ef668e5da938d2. 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/26ee5a90-f615-4143-8db8-ad6ffb8691e9.json and https://artists.proofprofile.net/proofs/artist/26ee5a90-f615-4143-8db8-ad6ffb8691e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pietro Locatelli: L'Arte del Violino, Op. 3, Vol. 4: Concertos Nos. 10-12
Pietro Locatelli: L'Arte del Violino, Op. 3, Vol. 3: Concertos Nos. 7-9
Pietro Locatelli: L'Arte del Violino, Op. 3, Vol. 1: Concertos Nos. 1-3, Vol 2: Concertos Nos. 4-6
The Romantic Age, 500 Years of Classical Music
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 0x8547a7bcf912278160b25928695d2c2d3e67f73c2e8ce33e6ce201aa2f59d877. 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/NLY331109610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c89d06b342cfaf25ee22907dab7614f213f367e4122c9b078826dd2fc504f5. 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/NLY331109612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb7de2e6bb53530660ec0e794fbadb85abadfb276e69417cb181139898cf345. 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/NLY331109615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc78c19bbdcac3b6430ddfd87a0bbc0a5e1d407f42d4be89769cddabafbe5d5d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/NLY331109623.
2 Morceaux, Op. 10: No. 2, Humoresque in G Major. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4091580a47aea95445582910e3da370827b42ab80aba3442ec342cdc1f07fd14. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLY331109614.
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 0xd01b33fc482ac6638b0935ed49a9aa00b92f387ab0e42a62bd1a1786dd8dafec. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLY331109608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9646020fc9d2937c358d7853618bbf2bbe68abbcb485f0d8b968dc5e24cec4. 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/NLY331109611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e84e941f4800f3c6ee7a5373a9e961172214c3b6c070d2028671f3ca5c7ab34. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLY331109613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c106eca2f9bdaf1fc2e0b627c81c5070c6793da91b8f0cebbdff348605f8e6. 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/NLY331109617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e967f52f867f11feee8413f86c053fd95905599ca8104c5852c925c7e94ebaf. 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/NLY331109618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4ba4e758b21f003e9e4f2a9548d58413102d62ad846d7ad52e50ebb131f568. 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/NLY331109619.
Duet No. 6 in C Major: 1. Allegro moderato
Musical Evenings with the Captain, Vol. 3: Musical Evenings in the Captain's Cabin, Duos for Violin and Cello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e83fdc70036eb0901479398c5cf1148df2bdb0fd0967e1c11d186396a8aab69. 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/US42M0430112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3793f12ef7c50363a36db96494187828108ddabb39b6859f12073b053737bf83. 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/US42M0430113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a5ef68781e52c01369a6fcd4eb2d2935447413a33039d61ef8c3d7bea15793. 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/US42M0430114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2103d0c17945ad45de65bd86c799b33384ed760c9ea1655bca8a2f0aeef2809. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US42M0430115.