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 0x08060aada178146d5d66b703decef64aaa229f72a33cd501743e394b71ef1fcd. 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/22cd055f-18c0-4b67-9d57-3d1d3655efb8.json and https://artists.proofprofile.net/proofs/artist/22cd055f-18c0-4b67-9d57-3d1d3655efb8.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 0x32a828fa4a0832669e3ed93bec31f5d2a48417d972b6500334fbe63ece08fbf2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:49Z), 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/QZNWT2008223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89e21b6acae913a71510aef7295589db58913fb4dae83b2335e6b5c4cf55dc6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPLS2127346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8254afe231c86c455693c0dcabc6a3083a700d5d6a2ee0ae3a0f9d6187ab86e5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZDA62222403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e33ebbf701e292d9d09c26e85585377c51befedb41cca5a9dcea314047f5bd. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:46Z), 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/QZPLS2234522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fc8f073e770ca9e35b6d45209887428f475d785784d0b727b437152a01a6f0. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZMER2307026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4acfe6176f06e0468c10518658434fee363cbdea07a6021f6fbca1f2f8b3ab1. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZWFM2390042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483ff4c8d77a0e9d187194425e6f7d2ffcb2b5526f372ae020c9679e6d32c8e2. 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/QZMEN2409964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c3ef2b2dea9c21bfc63b837380bc503ba054da1b82090b9af8b22d331ca649. 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/QZWFV2452412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ff47935a84f689f007688ab80f17b8bfeb21c71318f133f5434db48eac77e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6M2314966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ed657d5b707a1a217af92985fa5f31345fa3756fd61f94872f2e5fe1c6400e. 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/ROGRA2400501.