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 0xe9f48febf105b35c330023c12e010724b9bd175a3b8da43c298c506b36e369f2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be08b0a8-fd2a-4afb-8c65-31dc85d0d8a0.json and https://artists.proofprofile.net/proofs/artist/be08b0a8-fd2a-4afb-8c65-31dc85d0d8a0.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 0x9c361fb1f14c49ee894a2865a7ccb910042ccb1a4305fe1f0f1367da5dec4215. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ42119963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8739ccca4d6145e7de6385c0f3c9a5898148309f652ae79e7a237160057353e0. 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/QZFZ42119964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5c0ff9377e51967a1bf53dd79e8da9e3d8fe5faa911b157fe8683c74de843. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:25Z), 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/QZFZ42119966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c938e4954a910b686de1ce155944188cc49a9f168622bdd3ddd1279871a4e79. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:50:08Z), 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/QZFZ42119975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d27295ede6f4d719eef1aee3ce698a591fd914f6df38e0212287c469770aab5. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ22137861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3169e49445da4008e81564580b4df70af6e8f4534002a7ec9ecdf16f4ca879. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:38Z), 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/QZFZ22137863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deba2c7ab9573e0e4f83de286273b81374bd290f87bb12cf192df26b90df4f0. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZFZ22137864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a9b94d1ebdc7dca64a48e7cb758787f6b4aa8ddc52c9e11e98e76847ec77f6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ22137865.