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 0x4f233696071c0c769b805e920a545d0ba0d745ea975b77970744dc45ab4878a7. 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/7a3d0251-a4c2-4656-833e-2519123168eb.json and https://artists.proofprofile.net/proofs/artist/7a3d0251-a4c2-4656-833e-2519123168eb.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 0x4db8310db33b8638b4d95d249c553138394011dd0645b2ed9fa4898d76980357. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAGB2287295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fed99f8ce2ffc6018cf541b411c7b591499a3798ee4fa28e954db3f34cc2e0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAGB2287298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bc3d2e38a855debb7f07d11df9238fd86018875173d174a552d9fb020080b2. 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/FR59R2263361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fac486c6ff8a5a744ee0e68309ccb850c414e7bdaa246a55538306db53041e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR59R2263362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcf37e7f377c32b40ccf020d90020774cd103c0ccb7b3e6c0da283c9d599a41. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR59R2263363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73bbfb48393655b544e443ed896f5b7eee6f15dc96690af74811465cca11be0. 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/FR59R2263366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3776f43cdef043abe7ca00eabe0f4e9161f936c61380a2f290d05591aa990d37. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FR59R2263367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597cf8defec8733396c153bc84aa471d2f3ef532936be4c1909b72a27bff9143. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/FRX202290912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f3395db78cad941baa78450385400ea3e325b42ca47780d27ee783f1925ed2. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/FRX202290914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d480c39c30a2c8bc196a51fa71b6ba699ad3591cdd19a3b9ab20ec56fd1179. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX202290926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b986efec779b6dc78086d9cd08584563fc312575ea7875b9d116b52999bd292. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX202290932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e2d82d2ad9d0156dffe19a665145486b990edc70eb8bf46258aee08642c84f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FRX202290934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673c96ac5b6a8b2031fd3386c40840af2e99b0cdd0974b7c1257227372b871ba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202290936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a52c6c2f48e341527953593c2d627cbd3d561d1598c421696f7c9477877606. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FRX202290940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79422c04a33ffef5717390e2cef19d1dd58970d16e37ac4912fae24804a0336e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FRX202290941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513a1be06d5b47c27aae360ab00d339fae21c76d9846a09a68444395e8839aef. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRX202290942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61dd271776e82d8d5ad9c29e307b0ecd8217b53766faf2bf33eb1d57e431b3a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FRX202290944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307d1727cbdc62256502933b909225412734951c67306c7dfa48912ce570c223. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/FRX202290946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a59abc48eb7a82ee07c5688a19cfd5b549e8af0beca58eb9a7c9f296db0511. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX762219531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4b02c661bb81286a1c9649468bc0b0ab681ddf7659204ba61891e9a30c7e98. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR2X42312024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562c271eef8d7ac9f23a8f6b980cdf6d8075683b677f7799baaef3fe4744c003. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42312029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b8fb08448e1467216db8f39db4320a609f93fa7452ea8ebd3a36d6b70560a5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR2X42312034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcdc75ec5a134cf00750c6517e201d71ecb8e7a59b7d6f8685aaaa65035f250. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/FRX202322014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1207a52bb13a6df35f9bcbaf88ea99e5cea10e482521d6bc9d750831ebeb5e8f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX202322019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c31a6139210abeaeb6c3f5a5b85738f9ad2f05044c848e849dad3126c24ab39. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/FRX202322027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36122e14d505bc7775ab4f2ab25e3d99dc35e4715148ba364a8a34e69d09770b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX872361549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393f02f4379a637a940a032a546589371a7d9a92925c5ac50fd934d77c8a59a9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0M2335133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e7548d6958bf811ec377116e1086c86098f4ca195211cb156c34e324fc15c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0M2335145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc169cc00e01ce1b63d8715f1875716db7893adef58511ca6eb06bb50300666d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA0Q2391150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17420ff7f130c86dd6e0f4d082e07afaad1ac5b1cae329b8c5982055ee759003. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR96X2427464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1724387ffa18f99ae542d5140f91bbbe5efb020ff32c2921a825df73e8df2b6e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR96X2427480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e37d7a3d032c815d5df3de6b7c70047618af7655f861a64bcf0c14bfcf910d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA082468961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b8f362f1b970efb398723b37f04e4551a8cea8224db0c7cb8d4b025b9a11f2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DGA082468969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a9de426ebc0e6d1e477c7aa516767529126a6327a6c46206dab7a684db88f8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/DGA082468986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf83b422cfedfcacf7b1a9f24328d0685cf2f7090018f4a42cdeb3e782a5b83. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA0R2470605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312f774c96380acc768b9ec87070a051778ebbfc52ccc3c77b4cb4b0ae324726. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR96X2509661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa072a8e23cf4352550142b4e1e80f873936ace82bc45385cb39d569dedc173ac. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRX452506493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a56a70a85297a0d3eba9c35207320b526198503983908821f9891f0ab16bc1b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX452506500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd64ee1c10f78944311ad96760227cf35fc9711acfb78037b526215bd192bbcf. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FRX452506501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6455e8a2b55712ac2342e93220b71f301951677a1df5056dcf75cf028f00bbc8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/FRX452506524.