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 0xedb7caf97a7d89eeb024de7edfbae5448f37a5a6c7d9623b0536c4bc8f2d35f9. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cac5e6ed-730e-498a-a1a9-4488c75df677.json and https://artists.proofprofile.net/proofs/artist/cac5e6ed-730e-498a-a1a9-4488c75df677.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 0x3dc10654e54b294601f63eaa73a7e06c751cc54bbb3e225a3b9ce01c943b9dd0. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZK6K2263706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b18febb69b9708d58e96bd0c8760aad4b048133061f13afbbe9330c47240f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:12:26Z), 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/QZK6K2263708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf2234629be249ef8d14db58399cb6f7671d8961c9e57a10390c01ec95f761f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:22Z), 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/QZK6K2263710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab5989d32d617337855590dce233e6c14dd5a515c8c81027e5140500011357c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:32:13Z), 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/QZK6K2263711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8711398287f1d1bd1f283bbc3bdd15b7cb27805a54622ad4f5d10908d0e751dd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZK6K2263712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8338cf9d858b7d3966d30cce1f0d2945c6b33a8f70859ae5b5a91c881fe1e748. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:50Z), 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/QZK6K2263713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf483aa5f78b9ad49f6d04e0d35ddd8c83965979ab3d8d8dc40d9a274cc973f6a. 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/QZK6K2263714.
Grajmy w zielone! Ekologiczne piosenki dla dzieci i rodziców