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 0xf965922a2da30afbcc9971a37a82691696270ffab349de1521613110bc576659. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9b52b3e-f27f-492c-b997-b6a8ec28b303.json and https://artists.proofprofile.net/proofs/artist/d9b52b3e-f27f-492c-b997-b6a8ec28b303.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 0x9809e9442f7fcb33ff6bb40c6cdfb0c431143d6017b96547d4bc04eaf77c0293. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:59:33Z), 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/QZTB72494665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc280126c0116899d8833fbca6a2edde719da3ccc67cdfb9ceb774b402e8ebeb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTBC2420276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9748ad4b3e27d774254711b4e53121aa0a93b4f4838ebcc6c48a5aa77afbf98. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFH2484061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2fbe67b95d771bfbbce02dd20e3503aeb0d98453eb5657e61ed373136515b2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFL2459947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109dda7bd60f5b7fdbc0de63f73cf9719b6ea532093f12d9eb202257d4238120. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:22:55Z), 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/QZWFT2480991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278c174df1167836dce9a8818c994f773d3ae10657fc316abb80e47a6c259a8e. 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/QZHN32547926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bbb6c05d7a08da3fd02735cfb7a63927f8a416668d482255a8454f9a660b21. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZK6Q2539455.