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 0x61f09a502b6c7ad1eaa602300b66096d9d3c9522e541bc5568585f49827d9fad. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a646bcfe-517d-4189-9875-a5acc3e601a4.json and https://artists.proofprofile.net/proofs/artist/a646bcfe-517d-4189-9875-a5acc3e601a4.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 0xaa14ab9d81d82d84214367b168d2bdb9966403d4a3f2a5c2c8b70c33e73178fd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USX9P2019237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36528edd5d1f7bed8e27b8d8c3ac9ddc3a8fa163454bf0f92e4cf3c934c80ea4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:44:38Z), 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/USCGJ2142805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a7cfa474c71957cb2c1c52a68399b4f036bda17abbf882d3bfb72fcc2c9332. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USDY42128689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec935e8350603aebd8c6c319a18fbf40fd3035d30f11967e2c9dbb72775c1fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ2297735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002aecb5a49759f0536b41db7a03f0e5e38c4474f9496a65ffb3ce6df33e68ac. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:13Z), 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/USDY42245384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734dd7327a9a1948d68279af9a046caab054098e7fcf2a6ffe2e250590785d19. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:45:40Z), 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/USL4Q2341085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c23b643dabccc4b34af178da2b5cf59c77ee1b9328ad49ed82ec25a769d5e9f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USHM22537603.