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 0x98838281df3869cc129eeb12c6a275a2acfb59b9cdb3195bd9a4b9636bf6d394. 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/59f87cfd-a3b6-4494-8efc-297ced04638b.json and https://artists.proofprofile.net/proofs/artist/59f87cfd-a3b6-4494-8efc-297ced04638b.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 0xa9eac06e98fa243c4b5e5300fdd0f7de9e388ead80b4b7740cde06ec7c87b8a8. 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/QZPLS2189802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cb5ded83232eae9dea8e8213f5e39c8c5e87731ab2fb52293831b4c7abe370. 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/QZDA52217803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bb3a762925e753c10985cba4955f56f32bfca7f6fccd94f6ef7c6f49452bcd. 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/QZTAY2220903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0a7153d9246bf91b869b51be69f0afa6d82e08a369787e5ef60a2b5a7851e7. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFYY2311741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816e918e693159034605143608968a228f52384be21432196d9edab1e2207375. 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/QZHN62381149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5e6c967314933496f8393de175d5e5fae83da655eec20ae1889f71247a4702. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2307848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e34c5102f6c711a7d28cb7f4a08ddb10137b9516d8818af64bb7ffb77f5f272. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:28:58Z), 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/QZWFE2323561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c38c50045a8a01147432d564c5f21dc4c982257b67594ae312e8c1b6b54925. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHNB2481458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39aea143545c671c283a1fd3623237a07fc961e70e96e7f300c52aeb4c0f163. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZTB62427053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa932dc18313bba32bd1ead51dea6c48dcda7562a0fb5e389545278ca5d5be155. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:05:29Z), 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/QT3F92509557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1eb468c18056a1b3462a662f1612741b6e0ee54c1c7028a28624690fb7c33f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6F2413252.