Vlaar is a surname. Notable people with the surname include: Ron Vlaar (born 1985), Dutch footballer Alex Vlaar (born 1996), Bulgarian badminton player
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 0x40f22843c93481e532962447b4fcadde449e865169b36fce6f4a8c0d7fa983ca. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f223d642-fb64-4f86-989b-43688c2877a6.json and https://artists.proofprofile.net/proofs/artist/f223d642-fb64-4f86-989b-43688c2877a6.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 0x69994b7e2e1bb813cff172eddb5b7ee5a78f123b124007b2b1fdf1891a52740a. 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/QZPLR2237959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757678de84bcab53572b7d1a681b92e64fc243b86805f5ad2f2c9fb789fd7314. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6J2384969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251af5612638d5abcb80e2c35150b7466301351355452b33d4ffb614f5df5132. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:17Z), 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/QZK6J2384970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b0eca6d67296557f1747d0f6fcf85b2d9f3d2760297cc5e58dca5eb9fbc3f3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6J2384971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9da5cfa84c4d6fa2fe56cbfd846ac5910e859bd4c25b4c88078ea79c972f451. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6J2384974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f427faaf541d34a3d1111e376f57210e0cb5dd50c571e25c483214fa627656. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6J2384975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31f77402e62519e3383a7a8d9a6c2dafae295f263224dc558fd8bbcc5130645. 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/QZK6J2384976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e4ff834b158b1dded29ffb6a86e70cecb38d08f4cb4cdfd175c076530a59c7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:36:47Z), 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/QZK6J2384977.