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 0x5d808f9505451bddb77cd55724f9527b0d218c6632f1d7f34898ae8ba7fb7f40. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19cb2b80-b972-4c81-9e95-d06d042222d4.json and https://artists.proofprofile.net/proofs/artist/19cb2b80-b972-4c81-9e95-d06d042222d4.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 0xc26cd7ff3704a3f362330986ccb1b87d31569064b48b8bff0854c1f3b110c634. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWZ2415331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7c685d3bfcf7589752761515b186d1686a5367220201e28227da74b26f5678. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEZC62457904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361ba19ae0f768289cfe00450bd8c2a1460483d22d2f6763083df85615b3c835. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEZC62463297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1eed6fb64a597cb01455932e48f243e17a1e99fe2adfd49de4e4f97a06dd5a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZRP42399101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3068181e977f76078a8f203d287591affa2f4ab293e8b58fd9a4fe45e622569d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB42481334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24c9a9823c9a3b4ac577bad149e921b04322dcca0dfdb14bd56c3c43f281051. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:56:32Z), 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/QZRP42399102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8f53c6c90bb5b7755650cb7de6c6f7165216241e813249a580f08633fde931. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTAZ2488620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ad970d7d7b66bb4a6b4bcbd35828f5073796a1a1b57e7452368883a90e675e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEZC62463298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53942b36213b9629f154ca3c298dbb7ba55c993d3c5ac17ab1c85204bc2e06c9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAZ2356134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8263aed48bcc8d56f2397944e1acd62f4e9f4b0905903bc32f006d4529a8ea2. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DEZC62463299.