Etta may refer to: Places in the United States Etta, Mississippi, an unincorporated community Etta, Oklahoma, a census-designated place Etta, South Dakota, a ghost town Etta, Virginia, an unincorpora
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 0xea42babb258191aa7c9e849db7a97df39b9e86039decf2e052470add22db8024. 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/1cb43a5d-0b5c-4ae5-ad1b-d8e8ed53b38b.json and https://artists.proofprofile.net/proofs/artist/1cb43a5d-0b5c-4ae5-ad1b-d8e8ed53b38b.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 0x910e0c382943e72558b536a92a6c1b8c7380f4cddc4eb8436a2942f8363f9ad9. 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/FIWMA2300538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de5f4453ce0ac3c680a9e81795384ca1bb2d1a746097170295c3436c5be646b. 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/FIBAR2300664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51100c6465837b60048e6278af122a253412188dbbf1d333f4b7a48196302a4e. 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/QZTAZ2263261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc0c81039de0243d4d5ee808ceaf735e2f63884b724e2a9e86cb1aa69f3cdf9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIBAR2200433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa721494dc1affbfce079b2557131393a37d6184c7ed339c598bd493627f07b8a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIK3E2100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d9f8619b7431eca5ea5a9abc841977fbb4f9d302d9db5af0b2d06516d1248b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIWMA2200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2940253ff1b43939a52bc3e559cc6facec5dec784ee551a02cf81128a97ffeb3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIWMA2200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93496a3788e7ffbd13934941a59ad002a7b9e5ae4880281c0cf5f4b1176946b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIWMA2200222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80ad5bfc694d435fa2845f2f4d9261a763541349e3888c82235b6ad887824bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIWMA2200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc764643c102a09ad0244bd128f7689d3058473d98bcae4af55367b77ed323f3e. 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/FIWMA2200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4313f5f4a7bb0bba3bf858aa1b540e4580401a95f7bac564d247baffbcef3cf. 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/FIWMA2200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356cb870fe684f13d44e42e0a517e7e4dc75f7ad14772e66eb2b362f2c294661. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIWMA2200268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901659189f188d12b35ee277b027a6a6774c727beab6fd8ee5d888933cea3ee9. 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/FIWMA2200269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ef75baed625f0b9f65cc7eef8d3974884fb3e42b3c03aa9364d4032323bcb7. 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/FIWMA2200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9db0db2e2451938801e4b14f0bcf8f68f4f14e8a9afe4e5a2a3b35f9670122. 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/FIWMA2200271.