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 0x7e0bbed564153f010bf2022568d9e51514b0cd7cdea6e9ccec7dfc2d044826ba. 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/3c0969b5-bf24-4203-9e8d-9e908d937f96.json and https://artists.proofprofile.net/proofs/artist/3c0969b5-bf24-4203-9e8d-9e908d937f96.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 0x82dcea7dfed07e04717e8050153d394b0c71094c7dc2207659ad240a4146e6c7. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/JPTO00001102.
a love song/流転～Dejavu～soldier Remix (Soldier Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efafbe5108f2e28cd279ad4f309357c71ad0cd2187c8e46b16fefab5a8582f0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPTO00001828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7a38ae21d6175922dcccded4232435892082204b14147b6fe2cea466629fda. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPTO00100839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c43cf0ad224ac97fb929d4ea2b79fcf44b5767a2153fa17a4ecc5b3491af364. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPTO00100843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd31b6abaa651cd71f231834badcc32bcc589dff47a72fb37e48ec5c0bca0da3. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPTO00102351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c6d6802a4b9077f8bd2720f6e980ecee098abbfd05ef38b5c8792f467128f5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPTO00400614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdec4d8230797c2d3d8dee34f19bbda6a82b0b5c267b3aacdabb78a1f4a2866. 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/JPB602150578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e455ad376c665ce402654520a697fe9bf90e6b63c643420de538384ee20ce. 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/JPB602154623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1986e542bb8edbced76c8f771aa1253517e66fdc3d39133119e6c27fba437744. 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/JPB602163217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85dc05647321e53a6750aebffc878034b0aa330502c7435e03387b3b317b9c4. 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/JPB602147237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36fe7810698db077048a67cf52b146adef89b6fb3f00038313fcca64217e7bf. 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/JPB602177915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f41485179469d7c53605aa4d37f2bdf2aca0526020e18c0e13b1811725542d1. 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/JPB602181886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4208bcc840fec1cf9fe184098991f11194967a667f65401b519b359f818f5d34. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB602189080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e3374e655e9dee7807cc5e444991722efdba8183e7b18c3af5aea899a51c56. 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/JPB602193471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fcc9da7d063d29a37813d11ff8daf0c50aca40b52445e73bc9a2757f05b9dd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB602194277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f318a0a79dd8a087041942d759fb0c4aa5a3266384392f3d3503cbb1116bce. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPB602147238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa105da8090f267445a35bbfea9e837550fe8eaa548df46aaa0dbffee2452f4e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPB602144277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d962f84424d72a73111d0b55a0e02a3042ba20f4eba2f5ba62ea13f3bb8d1e. 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/JPB622202882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7e6b2979bcda92c6135a88f16a80ea4136d1dc25da2b1587822ebf3cc3e6f7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPPO00512480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf698f60930471c7ef39693bdd2770f3283319abb61a2876fb087f40f076f3b5b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCJPA2460701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74bf9b55b908d82e4a6a9004aee3e0bab0c0a3816fb8779155e72ee0eb109da. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92N2433029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b789424647aa7907a23259206d1a3c708d75c77c3a009c9620ffd2fd10fbd33. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS801837184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd31b6abaa651cd71f231834badcc32bcc589dff47a72fb37e48ec5c0bca0da3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPTO00102351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9cd7f7d41a7cb2409f4a735ac787437f88464a4a4aa52ddc2dd842b8194d28. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPS801403369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8e8c1b3021ac02365448045c112ac70243e2d455b4acb5a09a45f3158297f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS801403358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883167e200d30d924d578dfe7037ebef4d424551e0fd70d8fd19a0eee27d0e62. 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/JPS801190155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e6c2e0775115da66cf7ed295aa68cc3cc9f3250953727ce68488e3f8e933ff. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPS801091285.