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 0x53ee6fb8ed802dbd199c244a70dcae51d0a555050f31d64af8316aef001300ab. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bf0dd8d-c1a9-41f9-8664-bde713fcd21d.json and https://artists.proofprofile.net/proofs/artist/3bf0dd8d-c1a9-41f9-8664-bde713fcd21d.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 0x1a4061a1109bf89b7eba0dbcba126ad4a2cabe172cce3d91a370e2ae8e3225e6. 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/QZK6G2418644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aae96cd408a416c1df43bf32844de86ad4a8fb40bdf1a4539911199b41c209b. 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/QZK6G2418645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c18c421e528b62339eda604446fa7e928bc4cb21f03c08f1ccf2e171d9c94b3. 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/QZK6G2418646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c060ad467362132a4f3890d4d6c55c2195e6f6162c3a0c9b8536fd44a24889. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZK6G2418641.
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 0x4f1c8aed9f65b6aa179b346705734cc9054d58f41ea2058696ffb873e4c262ad. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6G2418642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e0418f730ac48b5d51c64cb0e80d1a59ebf6be3328ebba6ca8dd34470dbed0. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZK6G2418643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763a7e27fb0226570de5aea55daff42a59713978ac77c848ea7d13d32c5b28d2. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZK6G2418647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c8b0bb1cf2c9365ced032c39ab60327d7768a5844def145a89c80b72a8545. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZK6G2418648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2618b2a4c6e1f562c0e4f8a5fa48ec5a555a4fb5e2867b90903ce344eac9e6f2. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZK6G2418649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd8bd7ca7f812e1acb3a900558fe0d56327566760f10f4b61f2c42aad604af3. 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/USY251777259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd106154ce5ef55d91107a540812bf8fba8a1061170a0a209259bff8ab239f17. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USY251777260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418d89299362344464040bde7150131fb1598eed16f76a7a6aee995ba2230d84. 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/USY251777263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b7c67d61294f8412ccc16c821bca995603512cebaa995e57cbb0bc6d07b125. 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/USY251777264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a8e3b3556deff19e31e4c7b47efad10716cd022e678bec8d17802877ed9c50. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USY251777261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7762236929e88fc38c59672a7a73cef8469d956a4e66e490e5af6e3550070030. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USY251777262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbe8d8d880d819851d94987f023340a73623fed4c283768d8d98e1fac9b915b. 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/USY251777265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668c50fbb810bfdf67f5e4beaff0bb92aef269db6ea024612c4407594014f766. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USY251777266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3f02cabecbb14dea756e96a246112190af3c6a84051468b05f1234413b8cb0. 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/USY251661278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304ce84d048236dfe1c3756c60f32d2136232a2739cca31ade364c5bfee35f9b. 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/USY251661282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91b855303be91dc734e18298d937119d9cfe65007501cf2c64090ac920ad749. 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/USY251661280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23477a5ffdddbfa6c0b94620889f2ae9f810cecc87993dff536f1364b8f3064a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USY251661281.