SOUD, standing for System of Joint Acquisition of Enemy Data was a computerized intelligence exchange system where information acquired by the intelligence and security agencies from participating War
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 0x97161aef5bfef22417fc643e9cd807f05cf385319c5d4d3446532e4ec4ff1620. 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/1ebddec7-2ae1-4e54-8c0c-8e22fcb36bc5.json and https://artists.proofprofile.net/proofs/artist/1ebddec7-2ae1-4e54-8c0c-8e22fcb36bc5.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 0x5abaf1c4eef5215d2bcd7d9b442c92e90f2e4d09de0059e6ad88ce260c1e209c. 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/BX5CZ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a9c813c56887d55d1859f061246ea09f46c275ace72acde0332a5d7e3733ff. 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/QZNJW2431361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6561fc70429d914e4dde90504ec6da5525b2df9b564b666514e0a0ef0f5a370d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTVM2441473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200578143815709b977710a1be65043dc789f77d9fe29f31eb381c1f8fe9de89. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:06:24Z), 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/QZNJY2453191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1a55ba7967b70f46930a9bae8cf14dec01106890376949b5370343b1a9b249. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BX5CZ1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3082a2b410556f46a2b682eae3b2c42a015445316af29cb613c90b514301af7. 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/QZW9M2297180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a06448c83befbebb504df48c22c40251cb98af0ab6136e4c09ef2029c8901e6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9M2297181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6fb6bc6e63d49c54b865770f8410afdaaac35f559a4a346ed13cc20350ae3e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9M2297182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2a3f7885842c3df4c63aac7fb3857f73e1014c66e527c8705cf1c4ac64eb2b. 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/QZW9M2297183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f88069de46304eb7aea40cc0e68a3ef951d611d56fe11916889616075430224. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:00Z), 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/QZW9M2297184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053d308a50fd955f65bf82ba83fa8b291ee223c636c38663f2f8740d5e0c3ce0. 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/QZW9M2297185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c1fdd3707fb0e53c715273c1def6570412605af110e2dc688b3f69f76c2a8. 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/QZW9M2297186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8159895119d2aa3eebe8c76e90c3dd642ca63ff0c282c893ee83f0925551a495. 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/BX5CZ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76751a2ed8a0baff126d4128ff31492c86cb0ef2061bc61ff287b1df9ec9936d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6M2072276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec03512e1c7fa86f2b06c1615a96f7853c3817d80fc1e41fc448f2d629e80b56. 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/BX5CZ1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e8b01a9ddc5d708b4f0e81e008464202b08c1ab4f72ec653a3311a219e8dc2. 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/BX5UA2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4f9a39e64e0adb9658c353e297515c91f223a4dc4d4dd9c947bd135ba07a00. 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/BXRJ92200011.