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 0xfe8139da57abe6ed26c6c5ff02a7d469d94f0abe73d7bb9b4aae75af06de26bb. 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/6f24cdb7-1687-4849-aaa7-f4026d29a6fe.json and https://artists.proofprofile.net/proofs/artist/6f24cdb7-1687-4849-aaa7-f4026d29a6fe.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 0x911c8130e87ea10fe51fb95c6e0b25e323647e36c32b83d68ecd438f6b4f3241. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:40:57Z), 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/USHM81660634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e07e768d1ccace4f03c609aa4095e6cde694385b9ed5451845db02d99b32c23. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USHM81660635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a79a90910d21803b289a68ba0ea0b191de8e2de021695037b0378121180a4a9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM81660641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1b70aba64a86d5a93f1c014dfb39339f46a27e8d1a20d4be5214764431debc. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USHM81660642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e0c15c0ba006773db1fd91b1731c2fa9d45767668b576dd22babbe226af176. 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/USHM81660643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e8f588c3e39d77433430f587c16600acf1ecbbd22b8430c402f4492d1de5e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USHM81660644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38abbde24e1db088ed55ea362521149548b261862946d5cd33771a37c3f82c0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USHM81660645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461472a745e04120e9c5ed5a61ee9cbafa60c1efa0edf71e7e0f9f12b0da251f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USHM81730520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffae992757078b8c25b7a11c31261f050ec2526479fa2130c80c2e1d2115bb8b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM81730521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cc389db57ea167989373126e1098d5dd1672763b24c9d485e6635f3ad7b41d. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USHM81730522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda74877530da201ea35b4cd5f35b90530403306141414c6a660b3b928bccf459. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USHM81730523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6127c13a5600c9556bc6fa99d0c7c8cc5e1c982856f52eb229eea4bfb8fac7. 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/USHM81730524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b416223b80c6a0d9c3b5f5e1efd1467895105362c13d0291e73d78e5f6e46d2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USHM81730525.