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 0x50b5b66ec78f211d79f3a6c096e901f6a06ec333912439c3b45495bedc6a19ef. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f01b097-b098-4079-b31a-9a0e2e45dff9.json and https://artists.proofprofile.net/proofs/artist/7f01b097-b098-4079-b31a-9a0e2e45dff9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classical Concertos: Mozart, Violin Concertos 3 and 4
Brandenburg Concerto, No. 1, in F Major, Allegro, Pt. 2
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 0x1822c2650f99379e281b271d3997a309544dc2dbee656e99427426253dfeb1a0. 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/GBBXS1166157.
Brandenburg Concerto, No. 2, in F Major, Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340d71aa24cff18f8fda9508949e11ddc1075b23e581902fc2f84865d40fe1b1. 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/GBBXS1166160.
Brandenburg Concerto, No. 2, in F Major, Allegro Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98880f25316764c069ffbe8771aed6c8b1766d5a1696b7a991047154af7f62a3. 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/GBBXS1166161.
Brandenburg Concerto, No. 1, in F Major, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccb93983a2f046f9e37346a5978c83bf58bfae13c33016c141733bea41ac00b. 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/GBBXS1166155.
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
Brandenburg Concerto, No. 1, in F Major, Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9318fb6e991f3ca127cd3b08a1b884d7acaec829b61340a61cc29d7b002e06cc. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBBXS1166156.
Brandenburg Concerto, No. 1, in F Major, Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b816ae1ae279e2fcfb84f483ea9f76ed2237ba0da84c46e29461b0789362d1a. 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/GBBXS1166158.
Brandenburg Concerto, No. 2, in F Major, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9377b3cfdce8a0e597fd521a47d0cad644f449c97fee0748a305042f3b58ab6e. 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/GBBXS1166159.
Brandenburg Concerto, No. 3, in G Major, Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a5f7b9f3ae61651536cd04bbd5388cbb811fe1e83918e1107d80c4a20c4ae4. 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/GBBXS1166162.
Brandenburg Concerto, No. 3, in G Major, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe186200a89cd0ae3718f94f34849e77a68eb08877233a63a25a0f53725bc4f2e. 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/GBBXS1166163.