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 0x89fa3dc1826613b1b04a46953b7a05aa94eb2a49217b7c848b83de28060cd19b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/042f1be5-953e-4cdc-9163-653c559b9b57.json and https://artists.proofprofile.net/proofs/artist/042f1be5-953e-4cdc-9163-653c559b9b57.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oboe Concerto in C, R.450: 1. Allegro molto
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 0x86d3e75811c2dd51dc6f7784aad63b4b4ff0e70c47690e404402e295209e3d4f. 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/DEF059103561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad828d60f03fceadeb662dbf243953191b3319aaf7373092105e7717079579. 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/DEF059103563.
Concerto for Oboe, Violin, Strings and Continuo in B flat, R.548: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e99819d43a3321629d6777ae894c9d02903259031c892d40b7ac36a54f2331. 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/DEF059103582.
Concerto for Oboe, Violin, Strings and Continuo in B flat, R.548: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc8234546760d27c5a77a9996813ad6b6c97054f775a1be2bebc9ec8ab91e7e. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/DEF059103583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc4b9901f6cce2ec90a5c2d3f478b5fca0114186eed246c2565a6b305024567. 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/DEF059103591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374167744212213fb0e813ddd1a312b0de642c837fa9a7ba8164bba63a3dfdd1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEF059103592.
Oboe Concerto in A minor, RV 461 (for Oboe, Strings and Continuo): Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ba1eb4fe93558858bbcf6eca6dc5dca4f7e60c956ba6ac2b5bc245ea4ff85b. 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/DEF059103601.
Oboe Concerto in A minor, RV 461 (for Oboe, Strings and Continuo): (without tempo indication)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9da2632c21218d431761db45342dce880f1ac553ef1a000de1c1779578c0e17. 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/DEF059103603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ac4ffa70f6ba858831924a7825c784baff99ab31b0013f7594fc4bad65b040. 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/DEF059103562.
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
Oboe Concerto in A minor, R.463: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fd018bc8d22488c1cb76a9cee38893f64bed0795d5551eb23879cd0f4bc51d. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEF059103571.
Oboe Concerto in A minor, R.463: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c09d19a128e78ce4e6505f4673e0ae61467512d341a47a6e1dc792b5b3d3bb. 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/DEF059103572.
Oboe Concerto in A minor, R.463: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b8cd0d838953b296844135d695ea25914456d8c30e8030d14011480f6cf7b6. 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/DEF059103573.
Concerto for Oboe, Violin, Strings and Continuo in B flat, R.548: 1. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712775d5e609470be24b6dd59461e4c3e5beec9c3a8d31c88027124a1e5a11fb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEF059103581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb718f8b9f5ab19fa0e27d4cb5c9bd161d82a8dfe81068c9148fceb08edccb232. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEF059103593.
Oboe Concerto in A minor, RV 461 (for Oboe, Strings and Continuo): Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74deac2faccee68c1b97e58568e77c30667ada725d4405cb75a28570c23a3de. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/DEF059103602.