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 0xb35454cd5e7da28d3427f031beda166a2871cf94ad0224ab3bb7a70b004a8d7b. 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/c9411aa6-3eeb-497e-a3e8-4477f4171c73.json and https://artists.proofprofile.net/proofs/artist/c9411aa6-3eeb-497e-a3e8-4477f4171c73.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 0x2e10ea87704befaaabcb9e0b864349d73a8418979f9327d03513d31c5d4c0a48. 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/QZW9N2221150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7787b0d1e79c4ac6831161976ea68acb4b6ef46d50b0c52ca5da31baf74e2d52. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZGLM2350208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd913c7e43499153ebc71dad3de13d441d11f6938c9266e5257b014432d515e81. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNJW2363183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01adec5a63afc5f426651bed3e7c0f69a01451d655a01bf2c269738b648adfbb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9K2415086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55eaae460f5d0464b81d862a39610bc9bdbb3faf985daea9dfbc66307e98196. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZW9K2415088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bde7add70f3e68755950820319e61dfa7bcf9cad2ba452ace043598afa128b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:05Z), 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/QZW9K2415080.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679ff77768db27c38b07603383a1c6b9995cfc8f92f01989611e8a9347a4bc0f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZW9K2415078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e91b5886d938441a19822e7dafe2b39cf17d176ed8b7095ba6f5ea43c76b897. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZW9K2415079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d98d3bcd94505b7e38fdf72cfe01e5273242a8edb42c4d3772d7e961cac1c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZW9K2415081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9698d8d1878fbf8eb5321dcee4cb939cf79cade47b0ae3840ff979f69087bb. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZW9K2415082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc53bee329d28761d888b5c86370aa82e4b62a6e1a61b6dd600aff158a4fe8b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZW9K2415083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56de1ce9466988bdb3d8ff7e61c5304177d106a1fb2a476f226242201e5c9669. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZW9K2415084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8ed268bdc844ad4918ec1c4c47b3dc6632eabe52cf22209017ca29f837df0d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZW9K2415085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609e9c5fc8d5a2522a483152f99087e33faea8a079b832fe6cbf998d7eed0886. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZW9K2415087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265f8fb485135cd0164960de7fd5b4ca0fd2e1ceeb89ba053fed504a8c631886. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZW9K2415089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d8ae30476b1668cf9440503aae8d12cdebc46da23de51f7ce3391554aba8ff. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZW9K2415090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd95b71aeca18fb9e0de4c90a166d0262648a280b860b5aeb3c576015093732. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWV32551021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b8f08b5d23ee107806035d1c8a1feced318dcbecbb6bf7e4a833f933498f54. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJZ2572026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7644638652d40a9fac56fd71250d0bb391720d0b5f17464cf15ccc7c079e6ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE66N2358891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483f81fc5ab49fb8715dbca5a6f648e719275ae98aece6fcb7b4efec8fc5da16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9M2464225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24dd7eb9a8cbc2ffb40e77ab9a933dee11ff0236939c2ec5c2aa67c7b7e88da. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SE6QE2433161.