thumb|right|Asalto board diagram including fortress (blue) with rebel pieces (green) and officers (red) in their starting positions Asalto, also known as the Assault Game, German Tactics or Officers a
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 0xeb166fb52786adc8ab7a91b2b746ab9bb59c37fd465c107e4cd41da5471a63da. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a55e89a-efe5-4b98-a6d6-d7f3790d8eb6.json and https://artists.proofprofile.net/proofs/artist/4a55e89a-efe5-4b98-a6d6-d7f3790d8eb6.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 0x691db437701adc65198506e1823bf67fa866c6c6d0b062dd6393ff9ddbbcd6c2. 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/QZMEQ2348193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e4534377df1f520902e7d1b21afec866e76112ffeba5ec3382e27c3a5668f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAIK2491726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ae0277377660bb6cf3441de9be4d60078376c5415548f064c58600863f2db2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIZ2434708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20debbb19cb8ecafcf79c4187c905baa5abe40d15cffa6605b9c2e87e1b67542. 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/TCAJK2531262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18196790e5f8d1def8850835983e22a5d0dc23ffacdeced30ba0ab1797b7cde. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJQ2562193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600778eeaca94e8b0e35666042fe7edafc20ab4b9a81811175487b2a320f93f8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAJQ2562213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f816d289233b15d227788ac426bcb93663850901f76a9b0bf9704441f9d2e5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJQ2562251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2d150679abeda24056c489864eec3e2430aa265e81da327991663d052a2f55. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJQ2562261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690baf0ff0db47c782b700a93fa0a4a28dc68537d5fa714f7144ae815ee78c6d. 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/TCAJQ2562296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c470d480ab5c155873e8d83df358e355c27c67b53cb857ad63a12c3e18de6f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAJZ2580893.