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 0xf742a4af0744f89cffb8f3faecc0708da9498747aa0204712f6f75bc0814c95b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6dbc443-3144-48c3-a0e9-0c2d87da6985.json and https://artists.proofprofile.net/proofs/artist/b6dbc443-3144-48c3-a0e9-0c2d87da6985.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 0x766c79b479cca49e92cc655e257de8ba4abbf0b68551ee2dfcac74f2b0fd36f3. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZMR82501276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0e878f80d97e5498ae9fcb353986712d4213b2cd29c33ee6b88300fcf0f421. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:38Z), 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/QZMR82501277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1837480545490fffb264172306afa22ff1655d4d5648d17eb4e6358cabb48f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:23Z), 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/QZMR82501279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb9dc9756efb01ebcc84c3b6ae9d0c4fd98fa72849c5d357b1a328550519260. 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/QZMR82501280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865795c63b2ef0ad4800dfa3133ecc4bb8a3b20ecacccf66dc4a3d5a70cf7b52. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:28:24Z), 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/QZMR82501281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f70e7f1089b0843c3c15e857f89aa42aee2400bf27c29527434621b7348a89a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:03:40Z), 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/QZMR82501282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57a144f28bad8084da9e3df9398963798e5b27a7c1fcdb2e484e3f94e8e17d7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:57Z), 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/QZMR82501283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19b69ac89fa8b1a689e46fe35250d705258afdc3fd53bc04c8b1224fa2df2d2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:37Z), 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/QZMR82501284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbf8669e47873f730c6fbe5b9615781bb36f7416b0daa209259068a997a7b6d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMR82501285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc107b8e83ec3fb665f8654d4029174fd14e2fed739a48d1aaf8375af8cd0f08. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMR82501147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891f2463d4170f678d2434dde64cb8c43f25fc5e4b2227f0bba3e3dcbd3478e8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:28:05Z), 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/QZMR82501144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e21b5e6784ef29587cb39111e8479b905a5ab7c1f6492da41046785d1358062. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZMR82501145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b82804e7566d435e078d1255b0611d2d344bb8a37f4bada133d87cc0fd23b. 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/QZMR82501146.