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 0x71759dae32aba1b13aa6021816d9e03fee7225b5c60ef5d04a2aea2da08f599e. 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/ca89828c-3d8a-4ea1-85e4-22926da6fab9.json and https://artists.proofprofile.net/proofs/artist/ca89828c-3d8a-4ea1-85e4-22926da6fab9.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 0xfcac7c70ee223c48331a232413372f6d48807b7e5dc5c3e767d07e79da5ef972. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNMT2352844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea805becb3ae2e6db71815e93ac0c2950240cc5b8025952b3019f5472d80518c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNMT2352845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91cc085e8d4fe17eab487eefea7396e64c8abf1c18c04ecb9119f7e9544bfcd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:41Z), 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/QZNMT2352846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed66ddb3af9c13c504b6791ed442bb57237ccc2283781ab0f35ff5295fdbdd3b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZNMT2352848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2232a0da08104768b84a57967b64635979e903e03915d32722a5d76880fe71e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNMT2352849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b2a05682cee97a09929b36e8ea8b5c278ab201638e31d3c015241fbe903ca. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNMT2420895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779fdc04a9174f9f50eab2cdabccd8d5a51dc1caf6b4101eead63975a19e9e5. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:03Z), 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/QZZ7K2440364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf34532398d23663d4c1582a44d020d05c4db05ca0c41d284094c37c70b9e3b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZZ7K2442578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185d7a82884613ffcdf6b5ea3ba349b0f87967b0baeb3916b5c0b8642a467d19. 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/QZWFJ2586725.