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 0x8c0849145bbb24f76c91cfeb76ebcb957eb33ac22a50d32306c683f8998503c1. 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/511ccd8e-7f03-4027-8069-534eb5def696.json and https://artists.proofprofile.net/proofs/artist/511ccd8e-7f03-4027-8069-534eb5def696.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 0x9fd1a7f5308fe665f6168673197061e70dfb9f2ae7dd92b92352b623c4540051. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADK1767786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf4fdb05cfe91c82080e861a3d0477b1db77044d4bef40faf51c9966d713dc1. 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/TCAHS2353023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e0cd2cef2c39f797b400970ac5a19ba3151d8fc649f6491caf7f6e075b1059. 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/FRX991596312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d77af5d327120c258a564556810869025391a880da51e6318adba2167947cf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX991596313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0852c52b7b2951e64a0e43904882bf211a2461c2dcd37a24f5907f0e6a8cd429. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRX991596314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd82bc7b1fe246eb4fb618a7a4efba3dc346a0ad571b9d7aad992a0b4c464ee. 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/FRX991596315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad3e7eccc8a8dca8b40860103cc264aa56952cbd7af7d74615147a2876a060b. 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/FRX991596319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27641a0fb17dc37d7c6da7ba67dccfb631cb6d93134ecc7b82163d50ec5b2635. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GX7852500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf38095d1bcd9b54b0e9ce76a6a0a45d72e6cb4a104a745aa981ebd23a3048c. 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/GX7852500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91390debbd7d12748adb66b6d1adeae378bafcf7d813849e7de0e09fcc862bc7. 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/GX7852500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea866f952283f54a09848ceec812f8be523badd9f71a430fd28f9762d6eef195. 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/GX7852500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16ba0dc47b52e7e4e967a6f1f0c6f2c9c6967398626eb9e9fcf871a57386fef. 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/GX7852500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1501b51fb9b581d825db652062aed6d80f8f7b61d393be88d1d23e356b04512. 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/GX7852500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125f2a18ad0ddc2340caca93d56ae69b4fa2f824986d606224ae533b3a2df3d6. 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/GX7852500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dd766095a2085bd17b308126ee4510b016ae0cbb0e481d3506f66d83947bd7. 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/DGA0T2420807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e2c9d371e801cf46b524d4867654cfef3e86ec74657aec66fc3eb54edc726. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0T2420982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33937c83d8c0a7437763e02051cef22c5d3521e50c8c02db720df14232b092a9. 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/QZAKB2415175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a989a1594992131361264a84f80c80bf7e1d32b417150102fca2d63723eeba. 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/DGA0P2387788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb59094f685f226c764addc2bebf44021acfba12bcf2e6941463efb5b49fe55. 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/DGA0L2377816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5737b229faa73b81b6769d5e61ca0bc20f7bbcacf9a89659bd8acc038abd2b95. 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/DGA0L2377817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f56162740ab605840ed0df31c3ca9a38c73f429477312efd9bb5091f5c8f78e. 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/DGA0L2377818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a835fa30989f6f5ad2bf79e8f057770aa216dadae2120b2cbebf1fad0e77f8. 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/GX3Q92394124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edf4b3d8fdabc8aa2d5110012a81732d6f69096bedbe1115c145d4653ffb779. 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/FR96X2381045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2a1d9358e8befc98b43b4f761a3d0ef7ca88b8e04e73ec98e3cb4e2e997c89. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FR96X2381062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd76845e74b009583506d9d4ce7568600dd7debfe13c8ec76cb020fe37a0fb3a. 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/FR59R2353242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef190afbb14e5c294f8e946b5c89a68d4cabe4537ca1ac5c706c012b4a4f9d69. 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/GX3Q92332759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc4b941171da9eb00d726ab8f1d309d4015ecb408a69ae1550bfc0bdf5ac783. 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/DGA072238077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a203ca1abc5174d6b0c21540266cd20097eca41bfb43d9c57f3120b22b37db5. 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/XKA032200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9797fd4fce6f44a95c8184570a005ad036b237a66d5d172425e3b19d602a76c3. 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/SE6XY2187135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edb59f9792cdb11e8f19a502ea2b31b29c2378e23448bccf6645e896ca67c11. 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/SE6XY2187190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e397071f6cd3b3adac1663db3215213d9c686d1ebee5e138c0b5877c52ed5cb. 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/SE6XY2186900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ec1c56b82b30819d0f7ec47ea91741a3fe8654873d077a4f95e920044752b. 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/FRX762008091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c18f66ef2dd74436caf9214a1f4f9660cd9bc225b551e59d697f637a6431d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR96X2302903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeab07b5b8650629ac71a6f7cd1b6cac7501964b1e284b65e1b2e3814f33c0ec. 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/FR96X2302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9510dbc545fbcdfbf20306806622a483b8568bd224fcfe249ff4f1a3ee197844. 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/ALA091900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0603937d4bcb976b21d5bd3a9045ceac000f6622b2e0fce164bcea9793f2cfcb. 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/TCAEJ1906268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aff2803c0a877b2a1ad6db2af24ca40c6d38e1327f03680ab3de6747bfcf549. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USNIN1864201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff9a0b45e5ae7c39963b005d23c0cda8de034f6c42e29fc92f4fe294e4f0ad. 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/USNIN1889201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e511994464fc91c1ef48bb323790b4da369567c0cf4e93ae0312041cecd5c3. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USNIN1831801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0a45a6844849faacbe8cadf420a58820e0321f35063e4acf34e77f577bed60. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNIN1830001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90dc75cf9f0dc4750c9beba1f290d2639bdfba3c0a6d04b1d5f4579feafe5ef. 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/USNIN1852001.