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 0xa82f19c842a45e39c520d426f4da0abb92459e613f1dd420b4fc9dafdf410f2a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5b6aabc-75fa-4fc2-9ed6-b50f0023263d.json and https://artists.proofprofile.net/proofs/artist/e5b6aabc-75fa-4fc2-9ed6-b50f0023263d.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 0x2d091d941124505c41436672480c658675d3b0b5fffb97afc55254df3d2b8e66. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:46:32Z), 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/GX38U2285228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3b8d4132ea860adf3a5d57b839fae143397dde813ce14643a1a8ab10e8c1b8. 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/GX38U2285232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808ada891facff4cc25817e6e4c9f34069510a4471c2682a766bff3924c4d4f9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX38U2285233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea954b9d174e09ef667894800217abd07728d2123835af46f1527103f7931059. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX38U2285234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bfd2af0d26c2e18d32b6ce16e1c88fa5400c0cd30d45ba63df907b90b3b719. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX38U2285235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134eaa033e939769368673eee5057d45cee1b5beb932affdd12417c5ca04ead0. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/GX8LE2324038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe044173c8b2b6bf70c0b47a068491af64d90fabd2c9d997c1341094f27b9f98d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:50:33Z), 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/GX8LE2319199.