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 0x7f7f494fbcc195b73fdb197052382a98347cbcb7e643135fd66a1b17a4f67d93. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4c5e8b6-73c1-4dcc-823d-388f5d484e94.json and https://artists.proofprofile.net/proofs/artist/d4c5e8b6-73c1-4dcc-823d-388f5d484e94.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fe2044725ca8bf03ebe23e598f7b624f85baf15b894de95bef02f87e966411. 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/JPH201500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1d2e9d91b8a77c2679525b7cea74afa42b77537ad41b7461114d2c98ea1314. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPH201500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea553771745db1b298ed188d3bb4e98cc41025305871169cba9d2ef8fd4772b5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPH201500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267e58099dbb0290554dc488001f6b477e736d059fb7c126cd874ce4e5805043. 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/JPH201500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f931c4e0e949ab15981c84404f63df21b66be671026254cda8b07db8b0e8f6. 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/JPH201500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930a4ad93c5e04354320619a89d28dd13973fa8cb5aada840ce5e991e53ff1c0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPH201500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8767a198cbefb072265e3a390c9d781b786927f20c296321570293edc912b96. 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/JPH201500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce451f65170ee1cba7fc69ed91aea02a2b6f71cfa0e361d96f57f9404c6719e. 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/JPH201500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e43416191d42983f3225b72198ac68bc498337cf9c2338cd9abd4a11a6136ee. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:27Z), 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/JPH201500007.
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 0x65672418fe39dbc0ba38d5a4a0d6123a820b50d0f446a9f582a2d9c7ea52aab7. 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/JPH201500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3e0c1d31e287c874f696d376ddd944163038f54c64b65d5279568931c70764. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPH201500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d166e25b152e826240cef4cfc456278fce5ebf7007675c8d41e8420f32b7402. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPH201500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1bb405a49fbd74f3e6be1ad31df6ca3dae21c8e00b6ffa1e90cc2d8be727d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPH201500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b59d3e748ea1db7b36e388d62a9da31cfdd627ab7db6f0497b22e32aa51df23. 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/JPVP02408601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893033cecae8a5760fe7159028bfae4b2590dbfa8329f0beda11513aaea9c022. 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/JPVP02408602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db9b1d27324ae9b383bd4024cf91528d89d594c640bc8a82a26f17c46b0efab. 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/JPVP02408604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00c3d900ecbe5c89289e460742b96f34c121ccecb312fe0871701f32ec4ece9. 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/JPVP02408605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412cb862f5379eadfb9328256baf2f8ce12dcd354a749b47eea81fd3c3ec286f. 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/JPVP02408608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7527c9ab808ba75726651d44c88ad220833b5761b5586858bc2bf25387f8afd8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPVP02408609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752dc4e7f7fdf8295ce826a5b1ca1b95298e5a9ec6a47fb71e27bc9a21c82a29. 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/JPVP02408610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2e6d928302a9fea8968e10667a899b72640312ffb0fff09ba3cc33740230e. 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/JPVP02408611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5613981c2f09aaf8f429203455c119eb939656f3383c4ff9a9dc10f3b586cd56. 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/JPVP02408603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeecb430f9975440566cd5f302ea439bb68745d2a3dd26a93b8f5ded3004ebac. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPVP02408606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b544b8669a4147ce52f2b03678d28859a5bf69f19148f18d10628166f946f6f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPVP02408607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950d67d84fe95fee3968c4225547d4c85b5750db906188361c3783efec774bad. 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/JPVP02408501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4928ce987fe3a258385de07719e1e687f17adfd30e60d34529377daf2d62dc97. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPVP02408502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe31b3d0169ebc8b6a6c3736dcfc8205fa1065a2cb353aadda877e5eb58216d. 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/JPVP02408505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd83639427084795fa041cdebb4c1e8c3663c49144bebc5348257c8b285f7727. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPVP02408503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5bdf4b1b885666f8e94e01d85ff61089eddc57e9edb1684d4c15c3f34a7709. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/JPVP02408504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b392195bacbd05b47183a36c9dde51d9f2511db3a15ba06e8400b110d6e5cab. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921313233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62831b78caa454c8f1810b942e6a4ed93fb16a79f0f6b74abd40fb8f2a8cf4dc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPH201300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb75379ece12218f18196094ac02c88db9de274892fa76608372cef6d273724d. 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/JPKI01315987.