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 0xd053be74f02eae2e3c215e07597fe7285ebf3e1d4b79442857468e40f4d9b748. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaca2aba-09d9-4591-93bc-deac8620b19f.json and https://artists.proofprofile.net/proofs/artist/eaca2aba-09d9-4591-93bc-deac8620b19f.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 0x7a8112cb9d669c538a0bd984cb833c11b5c970a9b3c16ac735ed675456c52823. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAU291308805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2cd4cbefd5d5d396ce423fe044d6df457e4dd0befbda7fe7c9c57b43c34a9c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CAU291308806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89fca6346c17c35cc45766a0f497e86dbf843df486f56be5410abf551c01f0d. 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/CAU291308807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec31769eaf76e9dd7271204c9f9b4faef927c8f21317f5f4dd645d50c5b088b6. 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/CAU291308809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd2a2e9c59a7ad4572ab4f44a613dad3151458d4c0a89bd99b80a1f6e252121. 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/CAU291308811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf265b8fddaec454009e71d0c536fe7065d201e5ffa6fffefd80716032fb8734e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:22:23Z), 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/CAU291609301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cd50be75742a089ec16f4e3d5e73e55d545121c6886344177e477daee93261. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAU291609302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5fb5d3df421fb9da7e12afc2bbed9d0df587fcf07b314d1645a8136bf0cf38. 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/CAU291609303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e36c121d3c62bf91444875dcd7e201449415f12f8b9b56a71615f7131c96f8f. 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/CAU291609305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee53d2486f25d82b01b1cdefd11af31f267503505d18d4fa80825435ea859fd. 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/CAU291609306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc5384c0d47bf2b3cc60696e8ecbdc21166abbb143be03a41846720e677f727. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CAU291609307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7bec11aafb925826453f4d118ca44936a19b3db2d4bb5ca502dade26370185. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/CAU291609310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5072beffae86bef4dc7fd615cb85118a061d38bb826cb656621ba06f06f9d5d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:45:08Z), 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/CAU291909603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf61e1eb04cfb368476215ac8205098bb3246d4fbe1ac2ac81081e346321d00b. 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/CAU291909604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db7e7e88340678f4ff71d5d6da2268e76623065d9b80719fb5888e48ed2bbf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAU291909606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2f637bc7fbf4976a4a9b5a40273e36c1b3e2956fc80fe15b6f08b2a3d421e5. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CAU292410401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebead27e4bf4c02f1ccd732434db7f43a24b38ee68e5d67e190ef9ec855ba68. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CAU292410404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf5386c359aa58224661cacc869dd2f6b04caf2689154b5f810bef75492d1cf. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/CAU292410405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f451aa9a01e54cf474a5944c497fec215db5ca322c5b568cfbdd38f7a6b83c0. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/CAU292410406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcca0d8a1cb7a1d3e0a9bba477e3492420b75d00a3af3b1c22e3b6e10ad57d8e. 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/CAU292410408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab35f2272e3ca229e44c3d2b98647d8b01b674429f1c33a37a1c19f92f08ab8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/CAU292410601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93a30c2b5d7c3ab29b58518e758cc220afa0cce2bde30a1918a93e365f03868. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:23:27Z), 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/CAU292410602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e6c372873b0915fc7da6de7df5fd28a6f6fad7e909cdbb0998faa002d8ee8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CAU292410603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b77c4087b962d199087b45029a8523cbe75408170053fd2c3015b48033dced. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CAU292410604.