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 0xe1792484b1dddaf1a49286acae8481f218e50bbfb86db7aeac24d5fcb4743074. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65b03677-86e2-4bdb-91a1-aed8c7c28304.json and https://artists.proofprofile.net/proofs/artist/65b03677-86e2-4bdb-91a1-aed8c7c28304.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 0xb47d859214bd2cbdd8987136584068648afa07e01cf0524d6ec24d41aef34cf7. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZK6F2068419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c240f5eaec7349b88b27c013d0c1900bfc523e3fc6291a2d528dad0db7d82a0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:47:19Z), 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/QZFZ42267220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06c042f2cdc3ad6de7bca52a2fe948113d95855e2035a2f6623b14405f34b60. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN62268908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bec0ab22f522ffb5819fdc9e88e31c11a71c5ba3d2efbe40b97ac21dd19d2b5. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/QZHNC2289533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbb16a542584f4772c7bd4b1fe108eaae10df31a42cb495a0b693fefb2687ab. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZK6F2277581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd38ce9ec28ca6115dc73d2f7035084a0584fe39066951d523b099d1ece84ae3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZPLS2305608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f816ce21dea627ae37d18294f4dfd72e6a1658f13913a767c145809aa5f51ac. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:26Z), 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/QZTAZ2314751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f30d512d2465c36552af20c8149865318727bb3bf13d6e89c74f3e5cc2f3ce6. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMER2430092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd467113f6ecb824b645565d05bd7a922077d790954f47e2ef7ba79e29ffc341. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:16:33Z), 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/QZZ772474003.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337a28cdc191107f9aaed1be29ae9a1ba5da67cc7d53906f1a28c65bacf38ce5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTB82577650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353608c565e7261ee0a2c6edaf58347e88d1c5da5749538e0e53a7c007ce39f0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB82577651.