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 0xa02bd65af91c50860173cbd5719acd93ce98a14e64d9c87255efd5d30419e84f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8df13010-74e9-4449-8483-7e5dcfbdee8c.json and https://artists.proofprofile.net/proofs/artist/8df13010-74e9-4449-8483-7e5dcfbdee8c.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 0x0c197cace729e8b365f463af95b40a3cceb207e154a63aa05d5ce20042f4fd4f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ING111028726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da3ae1bc412a16cc144ad32a6ee4c1c2b7e8edba8fe5951c7f8c1606900b5bf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ING111028727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703aaec03daa717e4f37b91cea8714d3949b4fc0fc9d9bd5fb92178d87a5a7c2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ING111028729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b889e0e4ff6b7e9e42b14943ea752b4316a77f63366ee0cfe5cdb55cdba704. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ING111028731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350658b332a4166ff0b4c38965432a0e11b13833874a37164d0b04197b3c2b74. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ING111028733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b23f0bdf6e91f47424cf3ea15fc43842cb2d61a9d49ba0f13a48a8937a1be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ING111028737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfa11d3abcf78b9bd013846724127a0ffd65bc3ffb5f726f84c1e7a8e17eaef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ING111028741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e094dcabccb9792951a2b3d686cbc4284cd0bd246187271cabff8ef196c4c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ING111028745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fa7a2fc53d6a30b8e4a03cc1669dc44c4803006b41407f717251be3e03b30a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ING111028753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b38730f32f290ced2f92fd0230aae81123151194980692c751e4b166330c7fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ING111028762.
Reviving Tradition Rajendra Vaishampayan