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 0x575fc41cacc8c541780abc2b2a52b9a27fda550a4aee4da2eebd3cb57c55eb73. 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/95436419-be24-4391-9ddb-6ee5b53bd035.json and https://artists.proofprofile.net/proofs/artist/95436419-be24-4391-9ddb-6ee5b53bd035.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 0x5992d0881fa9aaef6f3acb1dec106dbc4f6098cbe0997cbf72b6e47fe66d4a5a. 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/QZHN91939302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615869dde76bd801fbba1bc98d3d20090427b18ac7257103a11cd5a98a9ca059. 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/QZDA82036273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd412d5c915c1aa144c6c426d06c39ade7ed04a6ee1e8c21eb2625f19e6e8105e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6N2026272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5992d0881fa9aaef6f3acb1dec106dbc4f6098cbe0997cbf72b6e47fe66d4a5a. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:42:22Z), 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/QZHN91939302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b91a2b214fb8c8825dd492c778b4730ac0ce725e7a15402a5d25cf6c4221072. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES81995429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7531895baa3581a22d1efa4e1c98cc1b31842e5b8313e1660bc49ec76cb30f76. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6N2026273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adfb921016477b9ac5944170514a4d427bcbe36d7a40d681461a0623e632da9. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCADU1885580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1521914d44af3174526e2b46135a5e6d6c72888638f39ef7b8366dc7f10de447. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:57:42Z), 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/QZFZ61995847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc351308ffcf6f52df7da3b9a3f028990be2e1a954299d8a6770c84cf5ff56c8d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFZ52027522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb293d8e6eea5a4fcb9a8da49c437f775071daf339f213a5a711c250ca7a54288. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZK6N2026274.