thumb|KOLARS, Photographer Jonas Yuan KOLARS is a band based in Los Angeles. Their sound is described as Desert Disco, Space Blues and Glamabilly. Founded by musicians Rob Kolar and Lauren Brown, bot
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 0xafadc4b39535844cda383341af9ff385e07c11c449f545f742aebfb76e9478f3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b907e251-d325-4728-b70f-c23c82e61b1b.json and https://artists.proofprofile.net/proofs/artist/b907e251-d325-4728-b70f-c23c82e61b1b.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 0x5306ce593e70c0074e49298e35c72e64d9ac041d97a817e4d26794d0fe32af6b. 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/TCACX1708415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa687e2b3d29a9f0fedd3138fa2d36b43c2c4acf5268c2f9a602e1720877a580f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCACX1708423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe9910e8c078e740d0d715b641514fb834fb8a73ba417ac95802f9a96f98c76. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCACX1708425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f78f6f8ae02e13a0c26fad8b24bf63b4c7a67c85dcba0e7b034ee3021c8eaae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:33Z), 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/TCACX1708427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a580bd79aaffddbdc5674ddce42abf7af638abecc3b2839c55a4cf509733d2. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:40:32Z), 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/TCADM1842607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881ce9ffa20e3d1b8d7443e62813528fb705af8ad5ee59b679fd8c3527535bf8. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZDA81919246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a3c7fb0291069158ab36671d731793623602c2ce9539b0561142c44754065. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZES51946912.