thumb|right|300px|President Vladimir Putin awards the Order of St. Andrew to Zykina, 15 June 2004 Lyudmila Georgievna Zykina (; 10 June 1929 – 1 July 2009) was a national folk singer of Russia. She w
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 0x09720c00b0982592edf9dbd1eb57dbbfa0ee7a8956ab51c539f91b1848630474. 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/ca937fc1-0b07-4e79-930e-eb243a5ce46d.json and https://artists.proofprofile.net/proofs/artist/ca937fc1-0b07-4e79-930e-eb243a5ce46d.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 0x9db4bd91230bf9b19411b573b783b8714684b2c97940ad96cfb815d6ed8c0a80. 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/UK2Y21307944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a2ca662020306fc848c2247f53d1e9d3f0ba2a3d8e310bf9f396ba8ed99eed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:35Z), 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/UK2Y21307955.
Великие исполнители России: Людмила Зыкина (Deluxe Version)
Velikie ispolniteli Rossii XX veka: Ljudmila Zykina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bffac85b460d89d08e1b5eb6a9b19ed9270785ce63e7caa668b249bf8e17db6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX201572930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e87078a603a4a1e7e04e2f763c28520872704a74180755adfbd8f44fed491b7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX201572959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0fa2685e7f31247c7c6e125db9258a50b61dc31e03cf9cd6033524fe38bb73. 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/FRX201572960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6944d67b5730841ff81d17b10daf8f7ab7d77fd1b5bb072d08644f2c0d565a38. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:49Z), 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/FRX201572962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e239190c3b21a21ce7c852036f0c0ebfe9062f46901e9783a5296b326c984f0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR6V81748496.