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 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 0xdb89e091a986da8976a4e79f8be02ff4d094a08a417d59c5f156366b75a522e6. 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/4b874356-550b-4167-a6cc-c294bed27c9f.json and https://artists.proofprofile.net/proofs/artist/4b874356-550b-4167-a6cc-c294bed27c9f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The World of the Philip Jones Brass Ensemble
Music for the Royal Fireworks: Suite HWV 351 (Arr. Howarth): 1. Overture
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 0x59fb85e9baca3c94ebf35c10b53ae774ccf2a121d768767828a7267025f6c218. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078130410 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93936b44f804d27e62e6f763f067dc2450bffaabec4313cf73fdcc309347f2a6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078611012 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001f5ce8f3e22d9092ebd5ebe148bfa637819113cfef7024f7ee5e59fc9bd73c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078641404 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6c8c7e07ba8e96125b5415469d884acaf3465bff68b3978a7c44887932e2b8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078641405 — a six-check JSON result.
Susato Suite (Ed. Iveson): 1. La Mourisque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2403f0f54527ee794447ca1d2fb8fe33fd7c5d6909b54ec42d63d1074ffef77. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077510371 — a six-check JSON result.
Susato Suite (Ed. Iveson): 4. Basse Danse Bergeret
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132c3c6415c121ada7336d90bb70851b170d12bf37b9622de47141e4c0b2b13e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077510374 — a six-check JSON result.
Brandenburg Concerto No. 3 in G, BWV 1048 (Arr. for Brass Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758395f80dc94b3137dcbf8449edf96b569c317b4afc03ece71d97a1735c93c5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078812030 — a six-check JSON result.
Spitfire Prelude and Fugue (Arr. Howarth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed09c99f17a8f772487810f4b58e838bfd2a3e30be60ee675796a942445e385. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077611000 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531f7ea1ebd5298380970c86146d2b66256d0941254b2c66b4cd3a800c34ea00. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077900440 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d536eb07c45fbf05c5688f8d3963595b47d5eb8c851eba16b8e1e8447932d8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078541308 — a six-check JSON result.
Entry of the Gladiators (Arr. for Brass Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c82d0a2930933eb774caa873eb5eda862c2dc9c00209d32862c6b1c718af005. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078541309 — a six-check JSON result.
Pictures At An Exhibition (Arr. Howarth): Baba Yaga; The Great Gate of Kiev
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6528f6707bcb0aaf1355d94f281b271f62cf0ecbe6d8ef58c9345228bfa85f3. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077742110 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c82d0a2930933eb774caa873eb5eda862c2dc9c00209d32862c6b1c718af005. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078541309 — a six-check JSON result.
Music for the Funeral of Queen Mary: March (from A Clockwork Orange)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879202455b7c0b41ce5ec8896211de30e33c7dffbd6a836c22bfaba7d7627c5c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZDG0600682 — a six-check JSON result.
Traditional: O Come, All Ye Faithful (Arr. Willcocks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2e1a9dd5f93206506d105a8f13addf75b1fe48ac0a5b5c6d9fc0974b8ec8b3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9400301 — a six-check JSON result.
Cummings & Mendelssohn: Hark! the Herald Angels Sing (After Mendelssohn's Gutenberg Cantata, WoO 9, MWV D4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5080a197d4cd9672cd9a59c155c4b378232eddd949a69600afc2ea95363da16e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9400302 — a six-check JSON result.