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 0xefe055e0a160df46def68352b89521205b253f3bfe4fd027085ebf1f60c8d0b4. 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/a4de101c-f29f-458e-a897-d30dea7cb168.json and https://artists.proofprofile.net/proofs/artist/a4de101c-f29f-458e-a897-d30dea7cb168.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 0x869aaf0ca50028ffeac3ce7a3c9307704012a2ecef1bc657775a580c27b0f2af. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ5AB1820998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a3f56c06750ff0b008a48ed2b5791265087df8c1fccf352c5d6758b895150. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZ5AB1821001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fca57b7e515c25c520f8ba5e018c15bd7450590baa74cbf74d6d497e10bf7e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZ5AB1821002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2614fb2f953a3db80d0e1c028bb6e5ef53634ac1164aee073ec3158755059df6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZ5AB1821007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6d1f776224d2b7e5f93419a750704dff914c389739c0b5e286b301282fcef3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5AB1821014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01666b59f500540bd52c3dee030b27ecb33321c5c4024da616fc3d463d3cd61f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:56:19Z), 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/QZ5AB1821044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4cc990894f49fe6f92cf674396f8b77644c0913b853d701dce09dbd35b7e34. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ5AB1829984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f50024bcab39800038d74e6dc575b6195c03b2cf28c5229091b7f29f3006bc4. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZ5AB1829986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260445e94449f3409ebba78f15c6eefdfcde8cdd30e821e76ca4b5c491592946. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:55:44Z), 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/QZ5AB1843138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33637c98ceba0f786df8d29da074d603f7812f43f04b140173bac51bc417438a. 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/GBMA21842835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb0a0ee3c288a400a70d38b1d1e93b6aa637a350b3bd88b945ad73cc77ebb99. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBMA21840796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340db6c1913bee4755b5b4a0917c3603eca15782d813c37721b2986cbc2b4542. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBMA21842917.