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 0x66cdbe87162a3213e5cb0862c90f26b98c5f149e4bb6a88567199ca4a9035c5d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/975df998-5ab3-435f-b2cf-170256052e7c.json and https://artists.proofprofile.net/proofs/artist/975df998-5ab3-435f-b2cf-170256052e7c.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 0x10c18cde93a6afed6deb936fec64f5bb6f98914f22f6401cae34aa1b0f8dc71e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM3DF2270424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f70fcd2052b75418a0560bb5451a20a361c60ae34c28bd73141038e4788e9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMANG2222027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13324af8fe5f0742080a3c94b9da2273ccebc91548073fa2a4fa1a6418c5a1a0. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMANG2235834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b30ad15422f9b1533c233931a9b462c4ed99db17af34cc18f9cc404912ae4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2420032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36be0ae5507100303dcdc3366d0ea86f5859a84cfd58492c632a87633b663074. 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/US3DF2433541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d50ef1d04b56c489019d544fd3d327abb5fc8d73b21ba0f77698f3b633949c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USANG2441725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7cdda33444f4fb0ac5c11fde62d1b2d4293023d0744160debd847c7d0294cc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:19:41Z), 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/QM3DF2406984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b30ad15422f9b1533c233931a9b462c4ed99db17af34cc18f9cc404912ae4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US3DF2420032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f70fcd2052b75418a0560bb5451a20a361c60ae34c28bd73141038e4788e9. 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/QMANG2222027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c18cde93a6afed6deb936fec64f5bb6f98914f22f6401cae34aa1b0f8dc71e. 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/QM3DF2270424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8a3b8ead75dc7779767b51081380f2a7998e93f157e0f73188dc6af7a2693e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZVEM1803974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0610e962df8e5c3b961be86344291de41de21e507c101255ec8b26edb088a4e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FXR592401038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3453ae6d814acbafe9acac533ed4f1a89af3aa993efa9f275ca62d84d24448db. 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/US3DF2529263.