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 0xd8a56f5d91be73ace3df669b09648d354097fe283252ae50eb5ecb447998bd15. 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/6f9a8f84-2a9a-4fb7-827b-f2260784042f.json and https://artists.proofprofile.net/proofs/artist/6f9a8f84-2a9a-4fb7-827b-f2260784042f.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 0x4a09b013e130706c3ee9aa206916495e165777b57a6bfc1aabfa5f147c467da0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:12Z), 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/USHM22481362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342187e7278c939b2fd270f11509572581a1da0bb270bee83f2681430ebd4519. 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/USHM22481365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c56b112f8fe3c73fe033e261e2519dc1d379ec8cd26157f2063d00e430d9b8c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:02:53Z), 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/USHM22481366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6898d0baa9173827c486587fc6f732b86eea762733e4858fce293d6e37f99e9. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USHM22481368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48ad5dc10c198ea4c20de9b68e0065f1bccd24ceb7a587c20f9c657e50dcb06. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:55Z), 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/USHM22481369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcf19d6c022b17b4292d54d8db188af894ff522f31f7c18a7e73aa7a1e60e15. 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/USHM22481370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd539727258791c404f9f65fb020d7d33dfda2bb974ca2c488c2bacc9a5b0cfaa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM22481371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89914949782849c23eea4515df102f1fae6f27b24903942e9948886832008623. 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/USY242449769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cd631813ed8006341648c3aef7c15f9bbf93eb054256a6664270d7dc6ac158. 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/USY242449771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac693f2cfacdd2ae559d095bc34300ae71dcfff7fed584158b4114bea0eea7ba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:22:55Z), 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/USY242449772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f677d68532865a0dda55ef397ee0b60b67067dbb361323cf48769e44289cc7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:17:50Z), 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/USCGH2525853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ae5de414b2a981e6fc0d49f3c9322ba0aa785ab3fe9ceaa3fbbfe5326ac45. 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/USCGH2576292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e4816c67254d4ce2c2b471b2165d651fbee3a6df8b6365c2296690e7b43e4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4Q2593106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04159d5cbc03f7ef259fd5d20461f1df57c4d081cde021834f8e2f8d5c731c6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USL4Q2593060.