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 0xded6c5a3cd4375748e12ea0933fc433b9ad310d089124dc96590ac2ee4abc898. 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/f345824a-22ef-4a87-938b-78ae358b56b4.json and https://artists.proofprofile.net/proofs/artist/f345824a-22ef-4a87-938b-78ae358b56b4.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 0x8b76f81f65b79c9b3488cda912ed5243c2ad947cbd5402adb9ba02173672f639. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:12:05Z), 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/USDY41994480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746b0ab3c24a2a1330b2a558abfbab8545b95f1104d9aff50c3600fde5124dda. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM81904307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4831c397f1af26c1d843352a313989aca31071465085621e5b4d6cc3521360. 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/USHM81968279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dce76a5d79c43ee11e1f2a91957a82499ce0e28ea3d8f90ab9c263bb701548e. 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/USHM81968280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394aa7c7b384cce27a67cf322e4945899edff5624471d1da5b74d1cf0d166c6a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM81960194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe93ad7c9a683fb7d9eaf740b165ef647eecafe4c73fdbafa57f73c5d5424604. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM21960174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ae041d439f918c04c0931790ed98f769c644c3069adb96bbd4558be7ff1d3c. 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/USHM81968281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff66fd21342a17ab20dcfa556ffc761f78030a5e1c7fdb48a15ce636f61b25e. 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/USHM81968282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b0f6e58d885219e0f4f4497bfaf9777ff7d4e3b4f180601eef955452767ac7. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:54:55Z), 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/USHM81968283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0879bb81d7f9c35a7fcab82ba4ce948af4471da0fdb857ada7d5585256f2a08. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM81968284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a68f1fcda796f6a9ebc871f00ba043c612dc4b9a1c2e83c284c7f6eb1b9fb7a. 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/USHM81968285.