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 0x136099013f89eae4689081cb211e3a630ae52d9c7f78fc663aa06c52ada52fb0. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f88777e5-92e5-479c-ba18-ce08008193b6.json and https://artists.proofprofile.net/proofs/artist/f88777e5-92e5-479c-ba18-ce08008193b6.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 0x4fe49c63a89c229236fa8eec3029d4ab7e26bf291715f68a983cf9e94b9ce9c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMER2276945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e462c7bd7ba25f5621e0460cec520ee4e2b75eb837bdd31fd2f7f92a443dda2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMER2276947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d647fb3c9fc8963108e4bce59c442e33c177141570823029e8f2c7dce0aa8d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMER2276948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe593dd9af149d75e1c8453181ad4544bbcf670552a1db98d90d8cea3e076d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMER2276949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866d341fb24dfa7633d531cbe00c09adc46a8ef066ba71a640b0691038be91f8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMER2276952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae8aee9861242f0ef9c8f84729651b0367cf95a7f1e4aaf8f7ff336b10f3402. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDXS2102365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaca49c2b51a29efebfe40766396212d359fc16a51a93c09c7fce81889d1031e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWT2377628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf504f10c9f0472ae37e94b03ed0a310fad254e3e236a0f6977977563332a336. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWU2233269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf504f10c9f0472ae37e94b03ed0a310fad254e3e236a0f6977977563332a336. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWU2233269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59f39c3ca6ffa0eebd2bf0c47632032827f61f274ffc21b0cc5653c74da3972. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2205332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431a907e2648eba6512d8077556ae1c5d966b708ca9fd53e2255a3ca8b027c4a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92245712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1942d00cbea1313a60d7d955c07fca683088202365b0e698552ed8bd970795a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USDXS2103275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de8c5c81bac051376283fe0a439213ce00213a0e17cec855c46b515b184f20. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDXS2100752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6dd48a0eaf0fa236015d8d4e2ea57d05f220df7d740889247710637f3b1197. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBB2309296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aa0774e3c6d3bb54d408c2e9e5c9e4b7c5be17f3a76c81427da1beaac216f3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES71841269.