The Excubitors ( or , , i.e. 'sentinels'; transcribed into Greek as , ) were founded in as an imperial guard-unit by the Roman emperor Leo I the Thracian. The 300-strong force, originally recruited f
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 0xaed46ace90deb11204c74666ee8fb20ef2e10d4fac868b0011c916cda3406504. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/554fbd62-af5d-4e8e-897f-8bd0840388b0.json and https://artists.proofprofile.net/proofs/artist/554fbd62-af5d-4e8e-897f-8bd0840388b0.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 0xd7363861ebd511a05c486314d10bef2570e66775266c62fa3dd04f74a3a1dae8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEAR42181969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faeed6aff56ad6f0b0977bde7fb8cf84f838d08646dca4776be811754791cc8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEAR42152140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b766b8135baa206653206cb1db1f8353d5311488060a2beaad0de465441c38. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEAR42172941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7043020021661cc798f9c8ed7be12f2d8477a2287ffc708d647c39151fcb5f9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEAR42187095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a930aa6a6ddc155a884f3bddb601ac71f95ac5053ecdfc1a917e9a50ee3e8. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEAR42141469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0007abfbe22db521b90e786a86f8a72b828d31383ce052bab2a679fc92a0fb45. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEAR42193241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55fb1bbbdb332276962619a5555b77a60d0682be971ed1f1f2516999ea0e8e. 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/DEAR42134163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb896a4a96b5352ceb1c126f9343df1a918922788df330f6609b589afabda5d8. 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/DEAR42118041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc467c8487b1c45f30de966bd78fc4ec3a1b9a5be59d73e14e4a63dcfa5fd3b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEAR42181375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbd9e923b72f6d20522ab0acb5cf596b7a110c874dfbef7ec174d3ad5008357. 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/DEAR41871060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6795b6d1842fa022f21129fbfca864f6735ecb9c7fbf0f4c51d4e3438cbc29. 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/DEAR41712027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419ed20def4b231edd4254b4aca9eb3673e4f3af7b53b0ea7f9eac31651904a5. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEAR41830900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27882cd847c3f26473c2cb9a6b5b5d33273bfe87672bbab82a1055a3def4e352. 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/DEAR41863782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e423e541dd5b157382a668b10fc85a1d1552c208313bede3a391269136fbea. 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/DEBL60724229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff76a41f949415457c1d142e090dbcb6a85c8fe27b319fad63f0400d53537044. 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/QZK6L2438602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e19cf4fb1cdabc81910d617eaf605eead0a7fc055b0eb5614e8e0cc0c41e63. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWFL2335691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3cf81ed72de6e323dddc3bc70cc63aa126b0ec43b97667453b6599ce75d202. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEAR41958354.