1K or 1-K may refer to: Astra 1K satellite Astra 1KR satellite 1K ZX Chess computer program Southern Cross Distribution (IATA code) Sutra (air company) (IATA code) BMP-1K, see BMP-1 BRM-1K, see BMP-1
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 0x740359330a456518dc3c941f7d55228fedd37a47511d8a41953092a040ef6ba6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fe418b5-bdd2-44ae-8147-07b060829ac2.json and https://artists.proofprofile.net/proofs/artist/1fe418b5-bdd2-44ae-8147-07b060829ac2.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 0xabff2222daa3c4fd493eecb64f16955fcdcb988d6d2125deee5845d768b2b8df. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/HKG731760185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35038f5070ba58adf3b2cf803edbe4893e18e0172f00c7650729b54710a078e5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HKG732253159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20a2cea4f4dee96ba48e8f3069f608c7072d3f8526689d748225b2c02e988b9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA052371710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f72484cf17eb80725ca1fbc1aac7d62465e56957aa275308e04e68573cadad9. 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/FR10S2404307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a6d536d738123f69793a7fe2aa3dbbc6a5efb986f818eda2e85730042c2c5e. 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/TWCT52434560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb17ff312e1b1b4dcb6b1f08e9b4062b852a21b9a22ce9bf415b03ea76b7b871. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DGA0R2452755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6728aeb3e242752c696e6284b91d078d68e6a75843ebc7840d9bdf8b659c7c36. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FRX282595660.