Kryptos is a sculpture by the American artist Jim Sanborn located on the grounds of the Central Intelligence Agency (CIA) headquarters, the George Bush Center for Intelligence in Langley, Virginia. S
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 0xf044e1d7e0bf09d190f7d9feaf71801a9172a9e44fe87f3e497296fcb6701dd7. 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/53efc871-27a4-487e-b11e-e52fe256373a.json and https://artists.proofprofile.net/proofs/artist/53efc871-27a4-487e-b11e-e52fe256373a.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 0x280646628a2ffdb222d2ea9435fce37d97fb8bf0afead807118e197603132893. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEU601204092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf03b5dd5dc5139ba57e6eade01cf03db08a13595e663772258057c22d8c38f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEU601204093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e050a5544b98b6942d02ea0cdccce28bed8ea974fe47b7751d55224c2c13e32. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEU601204094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf576a504f01bf1e33007ea133dbf9869146fa1b0289863ebadbba907757d5cf. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEU601204095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b5a31224c34258362ff46d97e0bf5b508bbf20b126fc053cf15e0d18e74c3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEU601204097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5561a142af87cbefc86fd83de814558bbe4d68e42ce9fda45cd30273ca575b0f. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEU601204098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4250b2c5d8f2ea1ec679fa5f507bf53b3c47c7b94cef015a65bfef23e8d4f927. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEU601606524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8021fb7116df9436676e8cb7c681126ec0f305adafa2a45e2b14d4da327f0a3b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEU601606528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdd9a92b2879b86bdb6c00a501bc77430afadf99cfded88139ce7856a0ec5b8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEU601908154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa675ce8f94a41ac3a76982ab9b28fb2cd0ce30bd5acdddddf91e4fb067fde61d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEU601908156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f1988f9b5b8cd3fb550587452e203ca9f432eaacac4de9cdeeab486a9c5fe0. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/DEU602109553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb672aa20d446caaa190a2db0e8c0912ea57d89c87a328cb5bf90a70427f2f61c. 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/DEU602109554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54635f16cbfc9e178453afeede3e145a46209e1b8b4a5f2acc8803cd99c368a1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEU602109555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2812db7e84ae09cdec547212dd2d9e181097413c434fd1d095ffdcd7bc0ce5a4. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEU602109556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4545e099c42718070055784f8c4d9aad110e0ea4fd56382593161db4fae047. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DEU602109557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24be5006383da09310d6a4e2f63a8eb57e160a3cfe9075e9930147949972ac4c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEU602410877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ea531b9e3ae632ad2a2be918a595dc02def4299a26cab37fae906c3b877169. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEU602410878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02febb97c20dfd1f73b542d4398f2e0b893272dec2cfceabb1f7f6279ffd661e. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/DEU602410879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d6bd1b3b187eceddaae5a815a1b70d5ee4b02406e08f143a20782e98c1d457. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEU602410880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9710083c495a424449c6e138c01ae4a8dad210ced1a40894dd9be53419d9719. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/DEU602410883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cbb875ffed93ebe30e12d388c5c30a98773f308f34d4ea3d23d94b13e3f7d1. 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/DEU602410884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7af64392dd0bdee1ec36e9adec90530a72e9571324aa0ef86e5061edc5ef20c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEU602410885.