K, or k, is the eleventh letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is kay (pronounc
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 0xf5a146554e16ee76dfc41845058c3ce17d05d1d5c8f6d678645cf4eeb63c9276. 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/6046ffc3-4d13-4503-9e4d-06e1bf984fde.json and https://artists.proofprofile.net/proofs/artist/6046ffc3-4d13-4503-9e4d-06e1bf984fde.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 0x71ff5793cb0f3601e2bf05e9368101d9f590d856f92647b53e1d3ac588944327. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/JPSR01000861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f450c837ac4785a134365a5d444beecdf35024aaad2beb8f3230b16269760a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/JPSR00500821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e11d8504df2a0912e2c152309b6ed5caa133b836766967468b34a7478cfd47. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/JPSR00502581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e11d8504df2a0912e2c152309b6ed5caa133b836766967468b34a7478cfd47. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:18:56Z), 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/JPSR00502581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0179c18eba73593b82b1b3e746a72458590ddeb94712865e049975f1063c2a51. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPSR00603434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae6ff4dd69d2593e011ac6b4cae3ab7f84f6201adcf1f0e165191117adc082d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPSR00602061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94760cdebc4791e96bf3265810377b4f854b8b81387b47a2470381c12b3f4b40. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPSR00603436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a13abea245faa90de2cb6524df8b6195c1732cea3c1122db6ab46dcf51e95f6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPSR00603438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c08b6c19107d40f5773e2377729db29836436f8cd1d83ac217974bf98d1ce34. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPVI01903145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1033d70960d943a04d146e4ee6bba603f2fa651c901ab4327f804f2971d05. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPVI02100940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3ef037189f2a478c99293eb5a89de50f517435c5fe4ac49a262c0afc591409. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPVI02103195.
Bitter Sweet Hell (Original Soundtrack), Pt.3