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 0x2fd6692a6f4428871cf52dbd52a5cc08204aae2b31979812f3c2f8c3ac29bdca. 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/19786486-6819-409f-b710-f4554f903ff6.json and https://artists.proofprofile.net/proofs/artist/19786486-6819-409f-b710-f4554f903ff6.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 0xe81314a67c8d9193c6a6bd1465cfb68bceaf7673406299b74342a62122383054. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6K2476850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78be1393fe820234b0ac41b263584ad121bb5f14db0662bb2b8c3bd04a09e82. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTAW2446796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa831245c89ca7a4147efeed555d6c818575c48b7c21f5650610301096b3cf21c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB92499823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c38bc390cf13a8a781998e32593093d2bdd9867d0044678e587d4709bf8bd41. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:03:19Z), 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/QZFYY2545654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c8665ef9879e6c6c9841014e4458348a5d44446f18cd39812d13df51a1d85d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:56:32Z), 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/QZDA82513670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2470227709400554d7b8bcec8db7e7bb31b74fcb838642872109f367d5b10a1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:16Z), 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/QZHN32552255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f692ebd58605f96821932ea5376a211c278b5b2821861bc4c41ae448be84a. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZNWX2539930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38283b662e71f63761accf5914c4a7c909938cd37d25f9b463ceeaf5ad0ea4c5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWX2541993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01fec5a8bf5e0f7aae9d91279b2d69a251ae8419381ae5a6e3da7bc2a5c564. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:35Z), 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/QZTB52574679.