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 0xe0450cde5e0a807ae0169d4e90eb312bdef0f7967ebe22e5b72fcb21df153191. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d542a3ad-b1e2-40ae-9686-9dfb01abc722.json and https://artists.proofprofile.net/proofs/artist/d542a3ad-b1e2-40ae-9686-9dfb01abc722.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 0x756f403a936fb1e12bdb92059ec48390f49cd61a810273384f7c1401b23a3aa7. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZFZ62593595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea21e8daabd559449dae9f09aa26c08137e73968237fa4cc186df0fdd8f410a. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:23:12Z), 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/QZDA82561322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ffbf95200a3959c5c0745b45b214c76a167bf44d6135b0277aa08c39f24be. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:04:28Z), 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/QZHN52588920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be0bc5aa659294bca5662b73a48e05f02fa6c9ba463ca405517db8014d63068. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHN52588921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f661bea47e86fa7b8bbc583d989fa708386606d78c1fb5fd82e943f0c98d30. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6Q2590550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd758912885eedf7f9ce158c28a7c98e8838db8d2681cfa8415453febc03366ac. 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/QZZ772589011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba47a0a583e06f5c0b7c07322daa5bfe5becaf33999aad47e6be067cccbda8a8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:19Z), 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/QZZ772592132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7195b74dc26ae911e417c4fe1fc1cea6b17be4432a62bed763fde20fbf2e3281. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:58:33Z), 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/QZZ7L2524989.