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 0x337d527a153493b48297341ae110d7183cf7e55fa1cca4bc841da07adf76b33a. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fe9ab3a-4629-4c8d-9970-37e43c476c6a.json and https://artists.proofprofile.net/proofs/artist/7fe9ab3a-4629-4c8d-9970-37e43c476c6a.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 0x4ecc9cb36d49b031298dd1c16a857afabdfd5f518bc7d4639f6706b766ba51bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ62071504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb03c0f6aac0a3518e12a5105d69b39092d2bffe5d39df13d75e8ea68e6bb7d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHZ62071506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9da5d151c6093565c695af99e09fc8926e57a6ce51edaea685446f1a6883993. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/QZHZ62071509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb6265a454227fe0073ea055c402e5814df6f21737478774dbcaef62b0d9d28. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJW2151327.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe359b4bac6587b50ff9c0c7fb1ff756a7dd549c2c580c62142d82033ed38020e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:03:57Z), 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/QZW9L2276742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186f6fd661b91c35ea9b3a3c94e47e5c8e3f0891822cfd98481c456a8eb9d521. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZGLS2318188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f6c626ba9afa1fe4004753fe069388f4d028c4d371fc61a14283632b2ec619. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZGLS2598863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610d01aef51fa91396beb65e3cb91b9b115a4ff9c7a4f57386ee55949a9f59e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJY2578841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d440cae625d7266600181f92a9f73452e9d4a8a4ac248fe7ba5c7fc0d7c5c6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZTVM2516218.