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 0x2d3aafce1be7d44349c88d8f0e14d8b7541a1309527163eab025d9703022abb5. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ef4ee7f-5cfc-4fe2-8a59-bfe5f40061fe.json and https://artists.proofprofile.net/proofs/artist/5ef4ee7f-5cfc-4fe2-8a59-bfe5f40061fe.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 0xba9858dcedc20ab4f0d137aad494d346735309f4e2a473a3d1e581718ddcf87c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2096420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818041ae8aab8404399c28841aadfd8f6b7fb1ebac76c6b35a01352e1dcf19dd. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEQ2096422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88edf616cc35bd27ebb8cbc4d883b10aaf94ed6dfef8b284a326a691aff6c1e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:56Z), 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/QZMEQ2096425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcc266da3b65adae01c21e7eca2ec004b6069ad28da3a559a4ea82f61b55bd7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:20Z), 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/QZMEQ2096426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8649c9de6659616f197ee33b2017b950443a4f3222227f21de5194583cf82601. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZMEQ2096430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0223a925cb4e57687dbedf9e8eb0950b9120bfb6603c052234dd96c964d48830. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZK6J2169428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79283e049036db54932e072945ae0b5cd39f34b87ed936d4f90ccfe02c2e865e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6J2169432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599c9a69842aafd81434ddb6d92a6d679bbaaf1ed9859d922adf582a99423ed6. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZK6J2169433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2c976c625410dfb87aefe6f040b43f789e94ded1a174454ed1ead89db5b848. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN62463686.