Esther Zyskind (born June 8, 2001), known professionally as EZI and Esther Zynn, is an American singer, songwriter and actress. Before releasing music, EZI starred in the 2016 Nickelodeon television
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 0x8fa7fc36dd4264f4a7f8af767c0a5e0e50a1ef1897deaeb93667a9232c7e5c35. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f03aaec9-b485-4bc3-be6e-81136c401031.json and https://artists.proofprofile.net/proofs/artist/f03aaec9-b485-4bc3-be6e-81136c401031.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 0x7f59385d75b0895857f5f1297bae30cc7fe760905355ac0f9a97e0a3da84f899. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM42K1938106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2f0801120c3625c6c5fc608bc19713ad91a72b0639c76536d68c037f460f7. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZLBC2100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf37b2c225bf55c8828b585e6a8e374a15ddad5ad5402166d3d483911ec1046. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZS672195541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb416811cfc7a305fc0fb930ff932ad0d4848449bb3ad49ab52de14d49bd475. 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/CA5KR2427311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5396c4ee59c8eda4eba9177def6c86b3391e3374944ecd350a59f3bc807f6043. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:08:44Z), 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/CA5KR2431346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379556ad24c1dc263cc871762e64d4131d99e51b96f9a30c5a3673c1a19ab679. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/CA5KR2431437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc804b7e37e541a4be2061231575225ef04d11bc3301abef0a56a75b739cee16a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:23:19Z), 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/CA5KR2441651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8749a29ce3f2a44f3d0c9345c253a962aac4f8c127377a9da0342e66ec636d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTGW2400834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e18921c04183aa877ee4db8c54ea9cbf14ba17e7eacc68dde5319f5a8f861f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTGW2400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb416811cfc7a305fc0fb930ff932ad0d4848449bb3ad49ab52de14d49bd475. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CA5KR2427311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc804b7e37e541a4be2061231575225ef04d11bc3301abef0a56a75b739cee16a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CA5KR2441651.
Dear California (String Quintet Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8749a29ce3f2a44f3d0c9345c253a962aac4f8c127377a9da0342e66ec636d. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:20:40Z), 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/QZTGW2400834.
Into Your Power, Into The Light (String Quintent Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8203d5b6648ab25cd198faeb25756153c7c5e1bbb3e065ddd768d163da7a8eff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USZ4V1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b41ec20c0fc7011d682cd5179b408039bf3f68892b314670859e94c6679414a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USZ4V1900297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b2c1457a0bf76e55ef17c8eeecb97e4163afca2cfaebfb5636e30d53c53977. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USZ4V1900270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8203d5b6648ab25cd198faeb25756153c7c5e1bbb3e065ddd768d163da7a8eff. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USZ4V1900107.