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 0xe11eccfc68cb76f5588e533a2f16a7afcfe6f95a8c8229b256e60a10f398c285. 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/c938df98-3814-4fb2-95b7-9a87f33db2b0.json and https://artists.proofprofile.net/proofs/artist/c938df98-3814-4fb2-95b7-9a87f33db2b0.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 0xcc46947b0a291b0c80edc31e2b7c8e4506f3db15b461fa30ebb66c7d46d571c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ1868012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd92ce3ea069e39236df57d82cfa44665181539d569bcc8eb060dc1dd88d54b5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:00Z), 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/USL4R1803023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405b24a5a2f4084c34b41ab70a69422b5b02f869d8986ee4e0346860271673d8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4R1803024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df324950de4902f0a14c2cb6c496d0c9e3653888de3ad855c14c9657f34a93b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USL4R1803027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4680a3bcbb6066e6926042d95700f95ccd5730e91c44a9f00fd420f73b3808a1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USL4R1803029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8f56fd37bc875750a444a4128e92595d3488c98b60b1db2aa830d6702109d2. 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/USL4R1803035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279c9db57a7571064c6c7334ae33ecfbee7c42741a6b679ec45a1688e4956921. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:00:33Z), 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/USX9P2374353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c6c27bd8e632c88916f5555cd3b03a659e288393b833a025fdc5c0df7831d. 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/USY282317258.