KEO is the name of a proposed space time capsule which was to have been launched in 2003 carrying messages from the citizens of present Earth to humanity 50,000 years from now, when it would re-e
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 0x88e735a1864b7c359f6dd41ea4af7753158bc96848b2c6ed1a6eb9c3da94a948. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96454f8c-f499-4d1c-9ed9-8d79c0efc191.json and https://artists.proofprofile.net/proofs/artist/96454f8c-f499-4d1c-9ed9-8d79c0efc191.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 0xf055dc76b55702cb175f30f463150294c55f1a213811ab9b4d5c13836bc91008. 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/QZNWZ2158954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa666a9a44185dd5df6f3ae5800ca2da98b56e7c3b45562a3da875b141c39ed8c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN92196680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaf5085e0dca099c74bb61e6cdd63788a01bf63aa14b0a3c0ad08470dad19b9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZK6P2197591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7666384033e4b01079900ba2da5126cc2577721e5e2ec573d302b621f46fd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEP2185676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586d575077914ce08a2c73686b46167529e03ecfc21c8617bb3342384ad16e4a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZMEP2185677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaf5085e0dca099c74bb61e6cdd63788a01bf63aa14b0a3c0ad08470dad19b9. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZK6P2197591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ec78b1e8391e361c00308646288c2644afbf75cac6477f35db9cb875206665. 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/QZHNA2095474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd858107348a8f825e062a72cbbd21160c91b517ebff18c8df1d785ed396d552e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZES82185999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa75c3665b21fab6590d5577ddc1f3782139f9d0efb9798f5f4bef73ece71cb1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZES82186000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd3213f95e9b371059a0045aef4d55b87941d8f8ba838767c253fd8d86eac47. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZES82186002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7217c947fd2edb9b15f31c67cb28426f1e7827f0ff772c9afb2d5f540f860524. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES82186004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b97862e6a49186ae17c6e5c12afcc8cdef30c2f9be1c4243ec4301eef88b1e. 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/QZES82186008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e03ff71ff9df5c099669122335b79620f4dbae30eb97679e7118144cb2b95f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN82201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97070f0c804b8802537203da97cc0fc2c954f7aa50f065a9db8c80fd1d3969ec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN62039205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f155fb73b8f66c96f4a8f868b996e0bc35d62b297d8743f04232c33b514bf1a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZDA72027249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02060ba891c5559ec5a4630d41ce0d65748758be76e2551f8bd683c7a3038756. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZDA72027254.