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 0xf22efe87d5e6a4da114589d229515906c8e74d085fb438bbef2f9825caa491cd. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c467d41-29d0-4a82-826b-7e6066013f0e.json and https://artists.proofprofile.net/proofs/artist/6c467d41-29d0-4a82-826b-7e6066013f0e.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 0xe00899e3f4bb6df8ec458bc008e2cab1d76478432a8c1116686e98f097d6a5b6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBE2332900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11804a1de695b0c79b605385d0a66e778a5426e6586897c9534a04e1a1bc9cc8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBE2332901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ea9f2f0baaa6346f9f74182ea001e383717bfba187b85700891bcad22286c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:37:21Z), 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/QZTBE2332902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d32eb954b6310ac153062cfca57cc96aa533b670f6db09964f13112aa1b8ad. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:57Z), 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/QZTBE2332903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd117faba292b80c1bccdf6131c5ed97dee5629489e8b67ebbad3af95ee3001d7. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZTBE2332904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8967b3e1d2d9f0a8d96cdd27f231a46c9e05fca786f81157ba5f0440b46684c. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZK6H2478135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e690f305f0c0f445488ac8588434e989342f53a3de8d859b7ca794da8db8f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZK6H2478136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75b7d3e3a5171d646bc4c36c67a4e549f48c7bfac285a8a51960c23964ec707. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6H2478137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277a748cd776cc7181dd835a7fc95ad5dd9aa2218b08e862c07ab69fd9addacb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6H2478138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894faea55414b3900244f6b3e46e8668df9eee96f1155366d63513c11f68ab9d. 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/QZK6H2478139.