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 0x243241fb6845507242de802d632c8ff2dc9499442e30e9b34bb8973a5e07496a. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09365fef-001b-46e6-a9af-fc5a8b737b9e.json and https://artists.proofprofile.net/proofs/artist/09365fef-001b-46e6-a9af-fc5a8b737b9e.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 0xad419568b3b6432c90d3577030097337cd226c3ef06755f9620f16d6029942cb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZPYN2371509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441d5a1e93cf42d6d31d314522f591231515c1ea6e8ea3026f6d7fa7d87ac3ba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPYN2376027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675a83a7d5a8b79b2bca2212e68ec9e76263723d3693b783fef4e810e3e4918d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:07:25Z), 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/QZPYN2386187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625df032fbcc20e3a19332e8254fc35417ccc9e4939ad3e2a812af7e6e312700. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPYN2386191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2520f18662c45980a1c572b5a753cf4255a8da2539fbae14627bdfecb0e86dfe. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:14Z), 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/QZPYN2386192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06681b250dd7f5c34b52de2bee1b1033e21b993ef5ddcee294780fa725112949. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:05Z), 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/QZPYN2386193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d92505038630e9b908251544c67b5c85c6ea21177cbc65b9273e2c9c9cc863f. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZPYN2556908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53103e0aede4dd5721a1c978dc8f0f8e1b697a395772f3e299395d7d0166ae8b. 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/QZZ7V2564675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe796e125f4649c2c25ff8fa44a8fbdda56835ca3e42fef6d189e0f3abb88d89a. 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/QZZ7V2562601.