MI2, the British Military Intelligence Section 2, was a department of the British Directorate of Military Intelligence, part of the War Office. It was originally set up to handle geographic informati
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 0xb61374bdaaf7f04460b6281fb0f26476cba49fa682e4b2e68e54bd3c527a3a66. 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/24b98595-b54f-4439-8dc8-bf128a83ea19.json and https://artists.proofprofile.net/proofs/artist/24b98595-b54f-4439-8dc8-bf128a83ea19.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 0xdfbea75c9f6490f4502b91a3ea3b4611912d3344cb39c02a062b8fc0887f1099. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ATR980011939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b7a901780efa20dda547549d4d849006832cde07a2a62a64a615cfc9f9ecce. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATR980011947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41530e2aa40430a569a47e04960266025a0ada268af685521377041f0cfc578b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATR980011951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a52789d4f5fe776a365cd17906f4f301b910a491708691a635776fbe85e672. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ATR980011953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4ccf29401a8c4e26b82818f918244d36c324b1ee0f6e8e75abd4969a15332b. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/ATR980011954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3356855d74a1abfa2821f1421e0546a9ed47537007c75e077f2ce497bd8d997c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ATR980011943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93876c53f7327baf3f46ca54da88b4dc555b72142f76ef7e3e9cfb1080b5bef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATR980011960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58f004517aac0b63fb3106d02165fcf73829ee8c9d73f0882db1a4341270da9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATR980011964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92461aba0d6a9fe44a133beffa67b074d47c7aff2e5dabfa0082851f80e5bc5a. 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/ATR980011970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d817c41571a8e08aa479392405fb82027c5f0a56d39ea814b5f48d31376af68. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SIA631200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf262057a3fe3f05ecfbc5458a46531061dea381c58f4ad59260ced38e1be8d7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SIA631400481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f091022139846201b675634cad94abb603e5d7e81c17e27b2441e216368a93. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SIA631400484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7886add66d6cfe53bc85a8ba312c4aa5dba6b81a1c11d9f233c9144b60043760. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SIA631400486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd120a5bcae3b7c2b171da1b7352596d4a5466f6d99f070ce2c73d3eee4b08f7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SIA420900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f734bb2bfe0f6da882180357772b6cde9c8699b8b97c4846d9382d75efb9e3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SIA420900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7a2f6455850cb0183306cd0a0196bba39aa2ebb2a1d280f5e905f9737a4d89. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SIA420900321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0a451c0b870e6ccb685ef4b6c5180a972e8161b1075926a91452e9e3360aa. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:54:33Z), 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/SIA632100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1273e6aa528d89c2feca14a2f8bbb991733a2c4232f2f732e5d91d29e60171. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SIA632100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6b7b83c90e97bf21cdfc1fbd35d044adfe26637d15357397dc8c62dab97a59. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:06Z), 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/SIA632100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e10f53557ac66b374591cfa2eb819a96e098c52d7e976b09f5f8f14a882444. 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/SIA632100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70219c7452e81f4874acc67ec6daddd1be360d0019a006b7a32e840bbd3d6699. 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/SIA632100078.