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 0xcec2177a779bd63aeb8de7136a73dbeffc1605d3efdfa13950c1591967f2443d. 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/7eefb999-7cca-496e-a183-56879c3b9a81.json and https://artists.proofprofile.net/proofs/artist/7eefb999-7cca-496e-a183-56879c3b9a81.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 0x2dcd97caa7e647d44a1d55247cd7010b9c08ca5c41bcfee4820a1acbf9c409ab. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:58Z), 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/USY280725833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be390b4f94ab064f7da75bd04cfa6e18b3915c0b4faaacb7d1a0d95b7096f1c. 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/USY280725841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83df31c980d76361769ae95fdbb8e182c0c7c7ef648d2459c8b703955e4230ab. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USY280725843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa379c4049936f657f0a5c658e9906154b890eb77a7f20f95d9e3e1591e155f40. 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/USHM90959823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b44ec2e56d66be78a68ddcbb917cfe3994e928b828c5f1a73fff041d01a7dae. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ1427235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f3872b8f03c8f1bf70ebb88aada85edbe1e89b23cfb5f23cbe3d15ceb7a6e. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USCGJ1427236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939d8afa3f895b28987cd34ec9f65a9eff22cebc28f914d34e04c972617d66bf. 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/USCGJ1427237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b8a21c5bbb4174db5dd6f5e95e7a5f03cfc408cd73acbc20f40647e2e7033b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USCGJ1427238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae24051f6ec98ac76c9ececba14ebc6971061440eb613065199c99b8d34e1866. 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/USCGJ1427239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd4dbbb27a41a15872912edee77b12e446c7e189cb6a67290d12cd1a5af6d23. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:41:57Z), 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/USCGJ1427244.