Zulma Yugar (born January 6, 1952, in Oruro, Bolivia) is a Bolivian politician and folk singer with international recognition and influence. She has served as Minister of Culture of Bolivian Presiden
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 0x843c6b594c8186d4384e86b2015d7b33395ae12939cd7d8c163c3310445dd4ef. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a501cb78-189d-4118-a5ad-0d2eecdca6e9.json and https://artists.proofprofile.net/proofs/artist/a501cb78-189d-4118-a5ad-0d2eecdca6e9.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 0x266b03eafae1bc7c5650178c55c00d39f82ead3e9a3288fec566cf48adec94bb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBBFT9600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7461c4d2ce87f9a2a468b6d443d778780810dc59d84aef1c0cf2fd8078fdfd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM4TX1738863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771841fafbe4d5031ad71ab988b3e00f6412a48537ee640dd97ba07ec5a6f606. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QM4TX1738864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef07d62f68ce859b494bde80037a7e4d1a2e917bd79f012b91820d2d150598b. 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/QMBZ91663077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e85188c3f905fc9dcbb6159fb0cefaebd035c10691f5d26004f568692e0e1de. 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/QMBZ91663078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa666b04d20e03918a8ebb1baaf149a131a4ba397c402eb4c6f45a58b4c1baaaa. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMBZ91663079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9414e1f0d4288ddfce6c69c2e0df9619675290cc409287c76ef1b91f90cbc5b2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:41:12Z), 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/QMBZ91663084.