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 0xea1fb7b39ac2c3bd1255b4b969607e2f72b789caf6ea8d844885f4ad6f893ff2. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8a2aa6b-e6b0-446b-98a4-0249044e949e.json and https://artists.proofprofile.net/proofs/artist/d8a2aa6b-e6b0-446b-98a4-0249044e949e.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 0x879cbd8185b3324283de6192197c4e78f08099b55667631e8f19a0cf3a2964e8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AR0982380046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc3e1e61486c95aabdc8b0525be6f9abb368c232a5cd054ca12b89da7ef44bb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AR0982380045.
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 0x5b3e65dad727c4604563492eada0b80995c03e9970ece1c4a3d81e7216a815e9. 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/ARR6V2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccedcf71e88be3b479c9a75bf199e124e775935d2e6ed16788e46d325a92d3fb. 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/ARR6V2300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc270422aca226bb2c27bf0751278bf95abdada518f8adf6d4506a624f04ca2d1. 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/ARR6V2300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3625c12527665f4f3c460c7a5cfecbab9c991be42387f6968cd6573ad6f1400b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ARR6V2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ccf7ce8155a39fcbb44bc98121df208e9e36d341f8c336608afbdc44521599. 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/ARR6V2300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0c21594a94fc82203126d230af7298658e42ec4da6c7da20f68901b269e128. 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/ARR6V2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8e2f7e3b1de4f1c82d2d38db8bdf8219f868ee50e8cb916d42978ffbd49a6d. 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/ARR6V2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3456b85516723d145546c0d7e0ec44332e65d1efa72cad8559157064d40d57fe. 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/ARR6V2300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8f0488b1bf82e7ef961cb9783670da0ea8157b91fec88a723dec7f369882d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ARR6V2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6076cbfc48bf8d9243eb668d82f7d2da3b5bbffcd44347adb8cc6cf0344dc400. 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/ARR6V2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663de0af48483ba9e161889a8df055fbb1c113ad011f733e9c8fda8b6f1bd4bb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ARR6V2300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ba2c8b48d0aec9605fa5c423d5e9c9f52f0cb9228e538e78a4c6de7cc802b6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARR6V2000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f164a3d30e2413b4081f990db4ab427495b32b8c24bcbb8d79995f555eeafe3. 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/ARR6V2000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931b9035f7164803456a53066fe579e5e3ef39c02d3789e40277cefda14c6e92. 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/GX3Q92177278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84939ea8464682b15d8aec298cc2bfaddae4b9cea523284d5dcb95de187f335a. 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/GX53U2010552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ccaf837e563050aa235f25876a3a9af0c6c010dc67e236910f8f5cb270e3a5. 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/GX53U2010550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18913b304aec5353b5f35475bf1c4e07124374d7dd2700d92d329db010395440. 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/GX53U2010549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18075665bca56bea7012fc340dd528d938be63355bd5e43f71e82e961789c507. 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/GX53U2010556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e1772348c06b2c2b04a80d95edb5038ddf4c22d47476395bb30570f329afc1. 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/GX3Q92196238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f070b71df76d63e9aa7fb8af0474bb31cde546768e4473d7c02bb4e4aa3020. 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/GX53U2010553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eb3124cb27f1280b52ef78dab8eccf4d41326a1debf90e1c73c968378fac1b. 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/ARHXW2302449.