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 0x9b3e1886794537243383a3d25520c03a3171c571990192a090a65c55b303c3c7. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de4a3793-8d1d-43b6-bf36-e6c27d00eeaa.json and https://artists.proofprofile.net/proofs/artist/de4a3793-8d1d-43b6-bf36-e6c27d00eeaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x8e9fa3e2b0573843ec3efb84bdf0ddc8e652b63a8179003620f2e58edc044c60. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US4QP0453401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8397dc3932436b224441e116fa8958f9f4e55a72e5ede2f6f4d2acad4cd61f7f. 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/US4QP0453402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcb193e62f588c35c768bd87115eeb9759c8f6fdb3656805308ffdfacd70296. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4QP0453403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0789f5407de2d6c218df63dc338a8cc7e41ca4556d90ef6961f9a6cd190f1d6a. 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/US4QP0453404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c976d52409084b036f6e68626eacb6c763207b975f692a72231f268f1e20a33. 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/US4QP0453405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfed9a11e705f78e967ff16047a397f10eaee891185798acc875c4403b6088de. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US4QP0453406.
The Vanguard Jazz Orchestra: Thad Jones Legacy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e14b15c5e9f3ed6e13c741a40fe43e676f18754041bafe36ce1cea5c10ea2df. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/US4QP0458102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ace052dea0cb27cb1ddcd043ea888f2ded5feeb61bebd21721ecee26699edee. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US4QP0458107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50deaeb58d4c182adc912badfa41374739b08f048f942116a33361a0329054c. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/US4R30739827.
Monday Night Live At The Village Vanguard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3dd573aa4dd7e349832ca2164547b7e4e2c3058789f62a8f2464d6d0bdf093. 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/USZG31400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727f0bfd803e6f2172a03009df7833a36f0289a96cd72cf99e8cae6a3aba9a4b. 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/USZG31400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0020bab9034306235878f40ef6069dc9188d81a4009e3b4e29ef1ec4aca2ae. 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/USZG31400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da0f5117883d97c50eb2ec53921091681c9e94badcf9d6f403797c731898a0c. 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/USZG31400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619bd14bcf39f87f32eff56e9f7351bc1617014ea3f4f926def9b4ec6255ed97. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USZG31400026.
Centennial: The Music of Thad Jones (Live)