Atka may refer to: Atka, Russia, an urban-type settlement in Magadan Oblast, Russia Atka Iceport, an iceport in West Antarctica Atka Island, in the Andreanof Islands Atka, Alaska, a city in the United
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 0x4d000601cc8fff4ab45dc4afbd166c5a0a9eb2a6958fdf1a309d77990c98b0c2. 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/3fec6c4a-8002-49c7-b68b-fc775d58c3ac.json and https://artists.proofprofile.net/proofs/artist/3fec6c4a-8002-49c7-b68b-fc775d58c3ac.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 0x14f1b1dcfe03ad59b094846327befcf4cbac25977b228df6a374549217e7ba39. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZHN82158727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8227e198588151e334c14104804f557759299297df19d9bd2b5c351b1d76b5. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHN82158728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69f0c59a563b4986542e66811e8266e80ff4d42ae9fbc2ee19069adf5ca55b4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN82158729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d48c7735af0b3eeee6f92c2a7ea0934c6d6d4c169ebf043faff82b9291fe8da. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHN82158730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0117467b1ac3f7a2fad09198de98d9b58ccadc67283ee18d00971f2c057659e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52289317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa293bd667ddc725a341d21f0b7e643ac7bec5a079c4a2989495d390e06f13670. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES52289319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077d5242a919b6de2386ad67ad8f6c8fa836b65f7767ecd33b765ea7f3dc29fb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZES52289322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1369d0d833a6c48d25960060be1ada6a9f688505dd095b295b8973ac1c315ccd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52289323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83b73021f5269dab9d956f463a83436b0ba27952879a3c9b04de5960c65e0c9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTAZ2373298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf08c9b91ecdbed07cce5c41c897ddc2f09cf2054860cbe66acd6dd305d266d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAZ2373300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a310586ae5710582e75fb97d5d92e14acc48107df9d607e89d9a6fa1c171a11. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAZ2373301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a723932912b91b56770c2886d6138a595b5a4961cfd0f4dc98f39de664a8d23. 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/QZTAZ2373303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5324f0f6e71f303c051fc57f6a37b8400d5d9bc045414f9355405bcf4b34b210. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAZ2373304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1465f609b9fcb068efd126c66caaec30d7c140b2216ef93e13a4d8c2ad4aae. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAZ2373307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22046f23b9d73bc484cb81ac6a3408407c174f3a165843f7354794154ee479f. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QZTAZ2373309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67de9ef596f4489e6c08320fd2c555f28caeb537986dfac8114357685f6a67b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAZ2373310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf726f7c6a6867a0b07888d477e4dd9d7d083498f6cc480823a2c5538681b44ed. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZDA42288471.