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 0x6169e15293d079ac5349a42b779ec0b0b7080c9e04c6dd42dbe782418c37a643. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf8b27dc-4fb1-4a81-96f6-364ac50ef00f.json and https://artists.proofprofile.net/proofs/artist/cf8b27dc-4fb1-4a81-96f6-364ac50ef00f.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 0xd289263749a0d199875a61ecc0c3feda455bd38ed409f36dfb94b1cd888b4a43. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UKXN22236279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0bf6692b724001a11f004e9fb2a68d1e8d7ac2c6aa38f857780c4bef67105b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWDD2427052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d5de8859ec1ac72fb2003146d1dbb8eb735cc48dd6dffe0a3a4c1af272ea9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWDE2430274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcc3708c42072af7fd688b8e0ef861486b6990efb893c1d22d96bf217c1358. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZUM72400964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf423bf1ac7def1d83080cfaa34aba00ce551c07fe30603ead2b2f4bed14013e5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CZUM72500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf275a7f362fdb7623a8f2b346bbf977a5751ccf7ddbcce8d44433edac1af179e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/CZUM72500554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a0e201e7d553b8c3f4ae50738335ed020d5626d315be8dd87618f1e8b848f7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:58Z), 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/CZUM72500558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e190c9dfa356afb880dcea60cc38b74eaeb5a123d681a0f2df8fdb25a8a70. 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/CZUM72501002.