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 0xf87666594d7bed6c19598467434f22b4eef41874010527f8564c20dfb4bbb187. 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/ced7b095-99ce-4505-9fa8-d2d4acb4013c.json and https://artists.proofprofile.net/proofs/artist/ced7b095-99ce-4505-9fa8-d2d4acb4013c.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 0xb46cac755b234d9efed029cb12017df6bd38a94baaa359d0e1f1a7a4233b3196. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESAAI0173766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b8ed2b707681d76e566cc42d304048c9a840868a699ac92682ab4cf09d49d. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/ESAAI0173767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7d06961b3c05b48c52722b03889e8439da68630a89609b396e89632fe9df3b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ESAAI0173768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaa61ab32dff5c7b46f92a37efe37edc9a6d3df0be0773abd13e6f0f5e50a2e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ESAAI0173769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962bc9b15326ff9b42f2242d4aeb67b6f3e306e0b76570ec4323b21fc0e03d06. 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/ESAAI0173770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342d478c31221c6439c1e2ea61d8d120126fe9d24ba1509aa113cd9d313ce3d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ESAAI0173772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee52082fb0e8768600a0e4c3ed51a9dab195376e26c310c48178a8c75b58d72. 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/ESAAI0173773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2360519c583a9f1371ad3b8acbf8d2250849c27c5513a45d91eac5ae4cd4b541. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESAAI0173774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ec8b8e21e5b732d952da378a1f9a4e93a73d7c857f1da729db1dc6502bc8ef. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/ESAAI0173775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ded420753b0ef8179977b39b6c7902e880193c84a26bec741257a0d85b4a4dd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ESAAI0173777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf819e63d89251d0f4711b00750e4f21fc30145e8e51084e3fb50f821f1b4b85. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ESAAI0173786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01ff338a41e601f22a13a16835d06444ac41d84c7bab5c2baaca1ab794bac1a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ESAAI0174181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521014cdec174bc36de8e6ed5a8eb9091df0be43349a4fadeae5bdce985937b4. 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/ES77G1420001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649744b8e0efe9b53cf53f685545475323f30de3348cf3a3ad6294985000ae33. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ES77G1420006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6c4b4faa4c01518f53dff01762a2d32281caeb36433fd114a5ea8bb8bb35d2. 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/ESAAI0174190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe93e47f8debdafcbe840a2cc5b3baeebf71882e21000869467ecc53f02b3b52. 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/US6R21511392.