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 0x3af274f54a74ff14f19117eb3432b72cf9e38e8f05e4b00ae0d1e5590aace416. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbcdb20b-73f4-490f-b31f-b03a9503d999.json and https://artists.proofprofile.net/proofs/artist/cbcdb20b-73f4-490f-b31f-b03a9503d999.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Giovanni Bottesini: Double Bass Concertos
Concertino in B minor for Double Bass and Strings: I. Moderato
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 0x494f50a91c95a5504cda3d9e6080cbde801442f0d349be2dc59b8979ef67bb83. 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/ITAWZ0709001.
Concertino in B minor for Double Bass and Strings: III. Finale. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b3e83ae3e915ef8f707c03e2064529412cdb5546560712b6358c22a9d6d11f. 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/ITAWZ0709003.
Grande Allegro Concerto "Alla Mendelssohn" for Double Bass and Strings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82e88a7a8317a137a45318e4d201aba12691a1e2ecfb3bb5bc5fcaa3c6e7f5b. 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/ITAWZ0709004.
Concertino in B minor for Double Bass and Strings: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98f5e665b9722adde543c74abe550eecdeba81e9354d2dc3861ad9398544a18. 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/ITAWZ0709002.
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
Gran Duo in A Major for Clarinet, Double Bass and Strings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7e7227992d0bd42731f7d990fa3efe47ad235eaa3e18539a20d09e759c81f0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITAWZ0709005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abf5c80af4486cbb8ef7ac5b407ead6883861202e2643928187d8b8b01ca354. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ITAWZ0709006.
Giovanni Bottesini: Opere per Contrabbasso e Pianoforte, vol. II
Giovanni Bottesini: Opere per Contrabbasso e Pianoforte, vol. I
Bottesini: Music for Violin, Double-Bass & String Orchestra
Nuova orchestra da camera Ferruccio Busoni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef87a2a89d9485ca77c8739c7724b536edf7ac59bd27c2db7f38bd249c5a88e4. 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/NLY332303482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f4e4019043718de6cb440bc44a167f4085efbb4780d37bcd8560cca8692d2. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/NLY332303481.