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 0x1f8e460899866448f56405a52192b60304323c8d11c4cd2211320ead4705d47c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df12fb05-682c-4e9f-b288-913a34d671ea.json and https://artists.proofprofile.net/proofs/artist/df12fb05-682c-4e9f-b288-913a34d671ea.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 0x05f04a2b8283e6042fe2d0480361fcecbd73f6af737825e99b59afb6f1c69c61. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:50Z), 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/QZGLS2145974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82b87894f0b41fda3c46213e6983f52dc63f26c0f3383993837acc4099de255. 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/QZGLS2145975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf2bda7ee8c7d6695ff1414a355adea5d5f84f3114a3d40271519540049e086. 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/QZGLS2145977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ec8fcc46d80dbe3520e9e8733aa92e5f81f5565f472848d2d73aea0ce2427a. 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/QZGLS2145978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c7ca71b5cda108a48dd6394a36ed79a79f4b4216df1082374f60e7e606e24e. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZGLS2145979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eb67ced3c404dc36a8c608769ddcda7d55ba86c7fcaaca7082e274d64d07a4. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZGLS2145981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e384cd60754a478a75fdbfc85791f636e4c5e84fec611942fa163c346d06aa5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:05Z), 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/QZGLS2145980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeedf30dc40b3c3b0327b64bd8606249aeb322d45f32a1c43813e769f315e24e. 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/QZ5AB2442417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3a08b006c744352ac3b3d10f7cd6470bf7e0db8f03f62c43ffe23684dc2e1b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:08Z), 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/RUA1D2445192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5435324b65d6b309c8f2dbeb57dc231751b12dee5bf3f5042b5f5f773e88f9af. 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/RUA1D2445193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5177167810dde59ff6fdad7959c0b85b2e66753e5aad4651c69070875b623a5. 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/RUA1D2445194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b26129e44b22d0b3e0d5f6ae885c58be98a02a606c8bac2b44151e48d6d0d62. 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/RUA1D2445195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68556df1f9a93ac40e417c52e0039e73f71c11e02927268aa3599191402a8a3. 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/RUA1D2445200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5023154cd0eef07c9186d5eb9ce5b1d1420dc16c1eac2a7165907d35aab38703. 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/RUA1D2445202.