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 0x0b46fd925697361a3ec660acf144adbc12470e28618df4db5304fd96a4a9277f. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d76ee3f5-74ec-447e-a1dd-4e97e336dfe0.json and https://artists.proofprofile.net/proofs/artist/d76ee3f5-74ec-447e-a1dd-4e97e336dfe0.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 0xc4d0839cdaa5ebb68b616a19b83c77af5c94185a6532a0a02c530841b3234d7d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHN72356710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31ef32cc0fee7b1ec3948bbf534aa85597045ad12e825d9d8b9fd6d5aafbfd5. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNWS2300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8443271f9a876ba644ff2a6af97f49bb94f9064faf04e86aab2d7feef5352bfb. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZK6J2487661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46bcbc1dff5cb518957a8b5e00cd372174e0731d77813fd78e6cee3a5b91bbf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:54Z), 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/QZK6H2495511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698b0b9a71b6631cd35ac785ea0b094b6ff75f3c2f5b4680cc068d09ce020087. 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/QZNWU2462004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc108230d102ee002f8c89fc69f66560c4399564d8c57a63fed39f9f9c11d6a0. 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/QZWFS2439578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55e5e7c4cad321535780cfd9187051179e5f30425ed66c721b14a208f9a785e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZZ762438034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62936d34600535b0e5d9889a85731374bd3421abfdb32a728f9eb57fcf04234a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:03:39Z), 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/QZZ762438036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c6228b45b612d8780cef6c9b20f070aee7c603d3658a349db8ed06b7d889d4. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHN52513882.