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 0xa9edb99169775823710c9e5b679177d3694c340b8efd9552e3035be19a3ee9fc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/302280c9-39b0-4c19-960f-8a059e58c6ab.json and https://artists.proofprofile.net/proofs/artist/302280c9-39b0-4c19-960f-8a059e58c6ab.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 0xc998c86d297dc07375c87c2ec3a8c222d5ccde8f7da9b2c53deb911448239231. 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/CA5KR2102326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb624f5acc7ebfe646350758c9b3463f05f5df418097615b9292170e174e5a92. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CA5KR2130285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d95469e79e08738115d05e61a794f39086faca4a652231d99e34d87386c94e5. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/CA5KR2153409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651891ce4804775cd7b648fb958ade5236bb33343829504b133be369d9bd89c7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CA5KR2196942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af479d1f93bde5f2ae541bce50cfb009bb55c4077e75c7e85563a40c598595c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJZ2258631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b9e55b5d5d7183c1bad974bc53b7f82740b9ef3ec01b4a3ff1e9298b2be65c. 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/QZMZ92354053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee28245a7007122a9c1f5c10d8512672f859d059569c73014eaf13f28f0835f. 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/QZW9K2241600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b3d58b70153062a2e14d858139d2c11f7482cc42ca940ea6710c566f7dc787. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:59:24Z), 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/QZW9K2345312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9688b2e2ffec0b01a72db639a5db15664efb7a40b5af9be79eb0b7571b7fabd. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CA5KR0008869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd770026050a4c379a8ee9aec11a1087a29bc1a032f3cece50a905468c3d59933. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QM6P42432530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc032269e9ec6a2cd4330fe82bc639b7debebb7f2f6114aba0bc03b037c8c248. 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/QM7282437643.