350px|right|thumb|The runes a:miþkarþi, Old Norse á Miðgarði, meaning "in Midgard" – "in Middle Earth", on the Fyrby Runestone (Sö 56) in Södermanland, Sweden. In Germanic cosmology, Midgard (an angl
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 0x56ff74a95eb183a179627f9e141e63ec0e6e238c2a85934d46e63fee6da1a1c6. 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/2d985039-dfbe-42ab-a835-bc92cf2b9e2f.json and https://artists.proofprofile.net/proofs/artist/2d985039-dfbe-42ab-a835-bc92cf2b9e2f.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 0xb6548a767400130d7389a530908bf1f117f7aef5a57f50be8660da183742a37e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAHH2322052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aa74f02803a2500a15330b9bf03463ec08fb4b17803db07d68e7477d3df64f. 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/TCAHI2331803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebc490ebbeed4946c30c7e5b3c86d7e8f22b968ace7e12c6ebaa88748e069ae. 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/TCAIB2420761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f43e5b2965a16cdeb863c8d42c2d366f626405d7ea151b89bd2047dee94343a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIB2420633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383cd93ec7d6c2813f71167526fe687cd577272a94e0129caed5bca7798c70d9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:16:42Z), 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/TCAIB2480098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf591f3d41c63409c1e8cda15eca2fcdfa5c8567690fcd6627905e3b7632828d6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAIB2480066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbb1f851932b30c44ad792a1db259879d2a03786ae24f3d0476bc5f6b148c26. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:55:30Z), 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/TCAIB2480050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163b86d2eef057c095f0290a1f913e33eb78b25709e1ee70e35a4c0cf3bca8fe. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:10:33Z), 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/TCAIB2480112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc287184d8f69de6e0dd86eccba9a12161c8eb6ada7d7e4bb025ab67eb0c45ddf. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TCAIB2480082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815266440228c432fd90766d1acf07bc224627c206f5b394cb912b0182d1486c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAIB2479977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ce6882235050e0820ddbf344d3dc28bfb255bd350a77266fb503d3d65cffd. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAIF2435785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21e77aed122e3f39eb37423b7550cf48d1c6e2d17b8a96d8cf1285a7b3bd815. 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/TCAIT2441762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef412de81a94dc8dda695b7814a5f3dcef5c8d65e99f6aac58bce7467c11840. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAJA2428052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6ce47a815ca2c0810683b2c99a74ab7a712123f3fa0d2ca525e9788376f028. 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/TCAJJ2501881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8379e6366fae8451e533d8968f55629196b3d70ba1f1c62c79e4b9d878dee4. 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/TCAJW2506544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87049117630832b9fb33e5625ce1834e3014fc75d935ebbc928d8ee5bef28654. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT65W2506362.