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 0x7235cc45d23538f28322ad75ebd7f887fe4edb8637043bc6fc865d285f61186b. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db8e12b3-e944-4f66-b50a-930746d01f16.json and https://artists.proofprofile.net/proofs/artist/db8e12b3-e944-4f66-b50a-930746d01f16.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 0x66742e02fcdc2782e53c1c2a76f19e0897219a2991babbcd20d5b26031c391eb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBMA22427023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb357ffb228813204414e8371d53af098ccd92cd16f54356d3ff699ddbdd83360. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:04:20Z), 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/GBMA22427024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5b101f8af31eafb1f30df5747614ba737222810e040f6abfac671a27eebe9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:23:06Z), 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/GBMA22427025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1857d870a2c052833bbc3e1aa3f2fcd7284e9309f5ef158e0dd2e22672eb003. 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/SE5BU2553510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa9fe74db49cd01120811ff83a923f5588ca24cd634ea4833ab73e75b584b0c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:54Z), 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/UKXN22579813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa482517cf346671df2bc7cf17bfe37745694dc8717daee01f3dcd2c41d6979b3. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:52:20Z), 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/UKXN22579814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2d46963ffc5d1b8bd4126db4c8f1427e99c2c21114c3da477aedd331224a9. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SE5BU2561328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498cdf7285880687478e6833157b10e876fa8ae290cf50417c92b842e9c9e79e. 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/SE5BU2561639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfbb6f51aa99680242303af229a7c9f00c86a7cf39b2d4710d2c95eec6c75a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:38:40Z), 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/SE5BU2561640.