Leta may refer to: LETA, a Latvian news agency Leta (given name) See also Leto, in Greek mythology, a daughter of the Titans Coeus and Phoebe Lake Letas, the largest lake in Vanuatu
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fed79dff9b4435fca97ad42fd5a06a51d3ecd8bccf063fc98d825597cb6d95. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f624547c-2fcc-4dbd-aa39-fc85c87b09f2.json and https://artists.proofprofile.net/proofs/artist/f624547c-2fcc-4dbd-aa39-fc85c87b09f2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9090278365ba2fa878c1b12619b3e974fa059a7c4f228296d00f13ed5e034d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DETO41582090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b4f183f0bd6bf1f7d8e8bb0de9caf0d4f0c3e5c7305d91afe4854b260ac2c8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DETO41545810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb3005b37b613e3dca59c26d4636cac3692dcfb003d9186dbce14a47346ef0d. 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/DETO41510299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90871e02b36986f4523da3888da264f92c75e62f787ca8450ef71e3a3edfb460. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM42K2054890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c98f3b5ce45eccd2faa799e86d0ce79b29d8835ad41f5b10bc4cf0056a28eb6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZMHL2015491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4215ffc23615ee11ff88a90e8d597a9720303a4343513ba7eb8ccdd74863f65e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS652119946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eedb9d0b7d0186d7cce28dc776ce5a18834c2c22d90c92343690390e0d178e. 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/QZS662117231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e69cf9c6a0576a00da5bcdaea23a1c9273ef9d3a54a2fd561d097b8e9822dbe. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DGA062297159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bc6d21c6fd33365fe4d82287869ad0b2415157a628dbd0f1197651a3394b98. 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/DETO42391089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d84c42a5ed70d922bb566fde4fdc6ce75401afb5c21334e678f1ef4e43ee471. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DETO42449812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d79ef2d25f9560e17bae0ab2d259ab2ebb10d82265d85c4c413305c45adb731. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DETO42498187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4cda39f11b7af3e3a14784e6e6e2c811206d1a9f2b1f6e8156e081eef381ba. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DETO42413204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc45ed866874f726672bb758242c4ca93fcff73e8326ef7bb1e679891692789. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR2X42559993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b786d4638e0b25d186d240f3af84b56a3f2ff1ddfcd8b80c890876805440792. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X42560047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2bce5bec476572c4347f70f8a548a572082a4386f461f448e2ffdaf81e8495. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR2X42560311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6f3a5e1b037fd0ad2c89bbecbf5a7352a852491c559b24a5387033b26480c4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DETO41868347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ce637ba78ddf0c7c9e9e241c92160c86dea706122efa0daff6ea8c45044045. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282584044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc841f5e97830408cf75bcb904119f39cb702577620f295f959e2f62719fee8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FRX282584045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb878e236ee88dd5cbdf843f71abbcf4005578f24991d77f9ccf68f5f9e9692. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282584046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21b81c9babe3d320eb113f5374d7fcaeafd93af7b0e298e66d021c47afb1a99. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282584047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47877c56883f660253f3c9b47ff008da5a1d172282acd7add83d657c47290e78. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX282584049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69c3e34ff9673c4488f1fdddc6e4df48648af938b6fa4fe76eb849d8ac765bc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DETO42539927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edcddfbfedbd91394e3db97125e3f0bb21929b58dbe27b71fc068dc08785aee. 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/TCABF1282713.