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 0xaaf5fa4fa05bbd018a55eb130246c004966caacf7d861b508549db68be3be7ae. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/088630fc-59d7-4550-8f38-77c2dd367876.json and https://artists.proofprofile.net/proofs/artist/088630fc-59d7-4550-8f38-77c2dd367876.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 0xd900b150779ffc171226a81933f682402b2003c0e98c49d89726815e1c2db1bb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:44:21Z), 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/US28E2231503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa452a07566d880829b5d9441fc852295d67a0059cf4bc7fe8a364c6cc7ef7f24. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/US28E2231508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0757f6eb66526bb07641f9858c4f47bfcf5331f28bd7024c909b0ddc038b44ad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NO2DY2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0757f6eb66526bb07641f9858c4f47bfcf5331f28bd7024c909b0ddc038b44ad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NO2DY2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93c1ef89dcc28144edb8f128acdd3e807624e0d1f48232033c102d3293cc541. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:47:20Z), 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/NO2DY2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4b4faf350cf1f9fd6c9eb5e76e82a7e38164eb51aa23cdd1748c5992d51ca. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NO2DY2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd5db215602ee6628d9120520b4b34ec077f867679906ec24c0e01f558b2221. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE49G2500801.