BK or Bk may refer to: Businesses and organizations Burger King, a chain of fast-food restaurants The Bank of New York Mellon, the New York Stock Exchange symbol for The Bank of New York Mellon Cor
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 0xcf36b0fbe482cd0f3ff9f031a0f3ce877cdb2f335de4e86416e2e0313c320b7f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5432bd3-4009-4a1c-98fe-15b30ff67874.json and https://artists.proofprofile.net/proofs/artist/d5432bd3-4009-4a1c-98fe-15b30ff67874.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 0x6767303192da76443052ad29220de8a920a7896d23cb96dbecffe183a4538121. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USWL12201394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e048a966a7e2f47f8e4cff3ad9ac3ab96dd44431826214ab584c5595a17150. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:09:48Z), 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/USWL12201398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd12c9a28e963462b6a502e6ae371bb789108c09e7e5e9e7f1cace454ad3524. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USWL12300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d5b75e7204e14e3a73633c14658491772636d5e1acea1f10d2d002dadfef4d. 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/USWL12300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e7ef62969a0da1f45b1275f3a9e4fb734f4d1636c6da92637365749f344f33. 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/USWL12300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315b23dcb1619a79602e62e62a4f547955807a4fcefbf39ec89e8c0ba3e7d851. 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/USWL12300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4137709aaf9dfc21cccc0784cc5c99a804f3327cb9b0c32f26e9e7afa94f48. 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/QZPLR2351395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834ed70ae91c1dd3e0c60f930c31efad455247acfb79a4ec961c56046eb420b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWR2385662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315b23dcb1619a79602e62e62a4f547955807a4fcefbf39ec89e8c0ba3e7d851. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USWL12300131.