Esther Tefana (27 October 1948 – 14 May 2021) was a French Polynesian singer. She made a name for herself in French Polynesian popular music. Tefana was born in Papeete, French Polynesia. Shew grew u
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 0xd29abd597cfeacd676c1e84414a883eba57f27807c49c30fee326a81d0862a23. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab4eda90-9352-40e8-ae04-e47c3c660a81.json and https://artists.proofprofile.net/proofs/artist/ab4eda90-9352-40e8-ae04-e47c3c660a81.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 0x2c9e28c1882d2e9ddb8db27eb685d86dac104bab5a18accabc71dca4c07998d6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/CH6542141996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed040c2dddafbee2fa2fa29afa6fabe4143ff1e99a90f3e85149536c270a187. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CH6542141998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43272095fe35c4dd1356e9d05d1e278d0774bcefb6ef3678f2d00339f71efca8. 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/CH6542147704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e11dcc2fb8763867bc43208a5dbedf4317b75e7202ce735ae8ff12fd35b57b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CH6542147665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726e415efa79e4f609b8f6dabb166dab4ccff9a9bbcb7ee3ac2c410aca4d900f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:34Z), 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/CH6542147667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfcd7acd5d128ff7facc6ca16d73991dbf59365b87bce18714b66696fe5fc95. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:17:15Z), 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/CH6542147669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b2866b3c9a521d3945841d65ccb924d2c5c8446d73420f25fe6b4e7ab42844. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CH6542147821.