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 0xf5f570bab4b4e13f4e620a8f7d047cb048df3d37f61ee754ed9d4919c4e25635. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc004327-cc17-4a18-b3f9-2b64c8a5229b.json and https://artists.proofprofile.net/proofs/artist/fc004327-cc17-4a18-b3f9-2b64c8a5229b.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 0x656a012b7bf78fba4f23bbea879ebc40754da641202b0b4be0f5f9c95f4ca041. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:36:42Z), 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/BES342300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cae31e0d2d93425cb8de32fa20323fe4ab088c35c24c4c3dc1bb0402ea629e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:31:51Z), 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/BES342300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae95ca1f44f69e1e6692c11569fac76dd25e771f6ab173f704136a358fb18e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BES342400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee178b424630ef7951ccc9abecfe31bda48c305380ca7f17f9b76f35402e81e6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BES342400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e8950f511c3116baea9bf597dd319efb5522da126d601354c15b0733a7c282. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:50:08Z), 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/BES342400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1895799d85720a8f6ec4a81d9847416705858a1ed19e435de2f35e9ab6fd92b8. 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/BES342400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42aaf703da3cf44620e62ef30be32749820fa0dc46d7c421cf77fcb37a92bf4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BES342400016.