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 0x182e474a5d1eb1250c47928395bc2e5ac7734436701a077a746989bf32eec24e. 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/305797e6-3fcf-45d5-a29c-25a6d753a2b2.json and https://artists.proofprofile.net/proofs/artist/305797e6-3fcf-45d5-a29c-25a6d753a2b2.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 0x4b7d53bbbc683b924a8021085b44c11b92f1357d4d509337e9fdb1d5ceb61b9c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/CZA162453704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e335bf8cc7f575a93ed97629aa22d6811fede6d19e4970aaed0a5bafe82c4ce. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CZA162452095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5d963caac2a8acc22eb9e85dfac7c65654f64c8051c2657b4e9b5f89afd7b9. 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/CZA162452096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1556046e6efdbd8f745e94165811973ac45c1ec372f54eab5d98223cb0aabc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CZA162452097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d1e8a7ff5f22a7de05e7312057e13502668c4e5b43a3e500770728bff8687. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:43Z), 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/CZA162452098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6489fcd219e5d416c2bf0c1e787f58b74a869dc9e643d510eae3c590dec8a443. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CZA162452099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657cf9f1fe10d09dc41308c17821b653c7b8cfdfb9fc7b96ef37ca2b278ed742. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/CZA162452100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8c82e82f4b6b9c078a8d7b55edcb3a79b97055f6c5343179583982c7d046bf. 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/CZA162452103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2903610509c853b96ec01b82c5920147b6f859570018cfcbe0c3a72d6b249a31. 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/CZA162452104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9035b0ff4bf0505d42ad50aadb05154e2477a0ff322b6a1ddb2a207326e499. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/CZA162452105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d668d0ab02755870ecfde698d2bfa0762792156bb1d2aec0d68f8c5bd6a3dcd. 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/CZA162452106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81e7cde9c08139d26c91f51fcd53428d0a7d91ffb49e4edf8942fec1cea6525. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:56Z), 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/CZA162452107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d7d085d2ccd460cb70ed91ecca88036d44f8880284142165435b2c58b92bb4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CZA162452108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c93103ac45378e4da09b116f8c0be1a87740da164b992b079b5c5c2ebddce08. 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/CZA162452109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea03d3cb5f43630bb73db526d2193305fe1465722479a0ca3a71f13bc9c7e638. 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/CZA162452110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6212827f332b981a293617fc33b08f729a96af0cb2065a032d7b1233272173. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CZA162452111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a12122796607ed5c6b561a74d2369c7f15d172555ef18a233867ee45e20da5d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:01:02Z), 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/CZA162452112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7798f5b2b9a40ecd5e741035f0a49fbe228ae954ff6c27e6300e7a691148a24e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:36:25Z), 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/CZA162452113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc26dcbadf5ed750c95da305be0611cfd3205da9e966717af36459202656c86. 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/CZA162452114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904ef671e086fcb82137b70b4dccfa6b8958031dfa0ffe86d92c0f9f13e4ba9b. 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/CZA162452115.