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 0x9bf05a4f4fd3475fe0bafd7e1735e06cddb2d1f03380cd0354d7de27f010568d. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddc4679f-6630-4e63-8a37-2097602cef1c.json and https://artists.proofprofile.net/proofs/artist/ddc4679f-6630-4e63-8a37-2097602cef1c.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 0xcafd1b02776232ebf8d629293c98f3fbef46d5daf43715563a81e51f5d185062. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CNF290832007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c80ee1c2bca0f8f04a09131095dfd0f55eee6e5a6536127c3194a2e9170f40. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CNF290832003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd06ed383bfd473d0db09e2fda020edb0597390307bb4b940116375b28f9074b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CNF290932609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf2d05f4567bfd782b715a95d428e1c952e389f3cf3646213de09adfc00425. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/CNF290932603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d5d6e9f8bf0e73a54c2b19661bf2b8385090b4682504a3f971d7c02caa4196. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:48:54Z), 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/CNF290932608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68c066ddce040ce3eaa58471c39dd0472efa82b83d9159190781a42ef8397f6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CNF290932611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15f95960cbd35b0cfeb28f29af81cb7c4e14f8e8f7c5c4a624ab923695848f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CNF290932613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3f6d0c728458174506ea6376dfe0108f4d7025cc621166974f4f0b860daada. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CNF290932602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7cb6e286be41ae36536248a19e1a02590d9605b117d37ebbf59718ece6921b. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/CNF290932612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69134da663d6734fbb76e2d649fa99e839c3b70016936331944beeece1f372b. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/CNF290932614.