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 0xd3e3aaf3651ca7658640befe8cf79c5323d2322ea8b2e89e39a825ade1ce2945. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8889a70-d1d8-4e63-851e-0f5e5b068e2b.json and https://artists.proofprofile.net/proofs/artist/f8889a70-d1d8-4e63-851e-0f5e5b068e2b.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 0x4dcffccb455a5ff0a1d9e918ee2f1366ce7b5dbc50c7dcabbe86486195c84981. 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/TCACC1491205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c795550525ed3544b3dd27b1ed66456be2f30b4acbbad0aadf9dbe4b33ce78. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:02Z), 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/TCACC1491216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05ecc2b3e115b5deecb38c95fd430ded33635af540353d3f1fb64b5712a9086. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:00Z), 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/TCACC1483939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f20547541c5798d24b996a90b6a22acb2d462454a541b3fe3f62453f9365797. 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/TCACC1483943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d01e62461993d849c0f8253e3c539d3bace3504af7d2c871fad6e1fbaedffb. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCACC1483948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f0e3165f20c3dd0c7a44d68aec8077b7694f8309821c1413cfeb29d0703d21. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:31:05Z), 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/TCACC1483956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab2b940f2762cd5c99a0ae3ebaf4abae9dc50911fa3a77026dba07de5ef32b5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCADH1713688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aeb59af7a31a9cdc118e202d03082f1ed7b4c19b8efa59095d6ba3b83665ab. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:02:26Z), 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/TCADH1713690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1520d74a0f32de4db7db1fe2cb8dac5988ed178e08781b4c79228449e2f60b. 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/TCAGL2246168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddac597b5ce3a4c294050e4c580833c8fc2fb656bb6d8d87be688b38cda3a8c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAGL2246210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d868542122cd1ac1115d14748a6464b9b564ae88f2ba1db3654e79f0cb63fd4. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCAJO2592454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392778889bbd8aa1d5c3ef2a57ef0f204c4be15573e1b8cdf2d39182c561c967. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:15:04Z), 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/TCAJP2592621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbbf6357227a3bb1507614f7268260f5f5b0754af7fe16052475d6a9c709ac1. 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/TCAJO2592879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2450c6238ee190a817e90624b7b53d97f5873af6b7c5c9adbb432f3583f63376. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAJO2593085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bd449660c87bbcb59975cccef32fc81e05213b86229275e16536d3a2151e6d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:32:37Z), 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/TCAJO2593343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58040b33537484cb4034f2ce1f4d77e6da4ca4cfe48a55ebd73c95c633c89b7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:13Z), 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/TCAJO2593203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57ca0f38856d6d4a8b1782dce4e4de68e79c47c7738a4a20d62ec99595d2483. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJO2593213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493d389a1a8123e9ff312156238785cfa7380ff02a6ba056d18c75fac8d5dad. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:47:36Z), 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/TCAJP2593253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1ad8aad42987da060bfdbc4ee3471579599afe61635574f8413be09793aca4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJO2593294.