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 0xacdf72681e4b222196c222d7078b16e54c370a3b2c7f30dba3113e62426f7a9e. 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/7ead3d82-7bbe-4aa5-8601-3f341b918beb.json and https://artists.proofprofile.net/proofs/artist/7ead3d82-7bbe-4aa5-8601-3f341b918beb.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 0x7f8b1ebc2892a9c9f6a7d86a03bb689ea6f28782eb1c61b7519bc3ba7f3ee6d5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPLS2116966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e76270a656815aea9a7a23d0df8390b95b6f4be712be608561d1c2427cbeeac. 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/QZFZ42235152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf71f74aa2993ef421d5a498f740a5e72d48c0f8f9ee5facb082a065b1b4e0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:16Z), 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/QZFZ42235153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0307c4a7ba7f47d2428e95408cb5b476115a941560e70dbeaeb7adc2202aa94e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ42235155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f36adbff223fa7d4deb3b9e176ecdade1b9515103852c05f2a586fe9ac8750. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6H2271681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc295f3e2b7be0307ed6d27eb3940405c38c03efad9244f9952424ff534cf7e96. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZDA52358543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cabb7da18d806eb987bef07b008ccc775c2356c10aae49cecb8955f6e530059. 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/QZTAY2330015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf242998a103f4fa214c662f0de9f192703abeb334f82df9abacd1ab277995218. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZTAY2330018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd732617987dc51129512dfacff81768c4510390964899e44193686e967db3d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:09Z), 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/QZTAY2330020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd564485dbff4ce5e042751bfa0d2ba19c5f8c31564e2a55a2dd32ea855bf2079. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAY2330022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441e9c5fafdb9d0f75f9e08c9269f59a027be247fdaa461a6f78d939d7cbf3ec. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:26:35Z), 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/QZK6Q2202988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f272c1ed680c141ee4fd0fffdb3618fb90fe338ef676718bc05b01431ad994. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZK6G2389186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214026c00dfb0842a277601717f31dc19b90ffcf73a7f68f8e9fd1282cd953b2. 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/QZTAY2330025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a117897e4abadf4963e849b84512f30f4fd8c2504a2f5d07c86084407d1478. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:59:52Z), 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/QZTB52292520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5250ebe9f36b2cab6dc0053ccf39140e66c391e4a5342bf9d1049fd8b5b66a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:40:59Z), 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/QZTB52292521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7eb39a7d79b63123dc01b098ac7f1506a8a2494d8f5e616044a3ea7c412a04. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZNWR2302895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628c14d6ddf6d9a3314fcd00908e7e56d1ee951ee854c647f5ade5dc1c37f206. 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/QZTAY2330027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ce2bbc11d784f52685b541d8fedcc66622a5dff0c636264fe34c4080c8afb3. 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/ES1022400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff02687ff38266f40e4df75860233c9876a71ee8418e1f6ef00ff0ecc274c1e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5022400471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e55e37fe00fe2a0b0580f110a7a1a844590bc544516993c6fc55870cef610f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5022400674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93fe8cd86ed278f2ffa153f75d6d086f48f7729698801c589326de0e9c4b0f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5022401170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f965e3ebee886f09848a4dce5f78905755eca62772fd7c82edaa334bf0d8532. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5022401169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd96af3f6e4a8e9d175ee0019a9d9108423938b725487f6e628a7ab26b40fa6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5022401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f97895056aa8c175eb80c761a4951cf66b89903c6056972646a5c80a928ba42. 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/ES5022401483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8863018d5ef3c44cc2c3294b39f2c10ae27b555e624f6e2e2a215fabd56c5094. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ES5022401770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c13ce1e7bb669e4f1b9e90e733230c9cb3761ccf8366176ceaddae7ccaac987. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ42459998.