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 0x9283e46e46c82fc0e0ff26b607803eeb73510d5858ac165b977f8b349d50ef17. 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/71e04f8d-8a5c-4c34-a4ab-1c39068149f5.json and https://artists.proofprofile.net/proofs/artist/71e04f8d-8a5c-4c34-a4ab-1c39068149f5.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 0x7bcbafb3da3a8556b55d0b6e43d4bf9cd9c9a1cb357e6ad8cdcd9f4001b678f4. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:49:44Z), 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/JPB601301657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385919eb16d4babd2e42fc174370ad5415c5f881613407dee0a1c1d4b1c790f3. 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/JPB601301660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703547d85254b917b3a243a318d025d4abb3ef0cf03c700b6db0adac4ff06c75. 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/JPB601204201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2da04e2bcd71d58206d5993e6767355c0bba698224e413ad33fdaaccae8c4c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPB601104101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f8f040e2c4f86216169b01e84c7ca7558fe45639012392f33e54ea5f8e9bbb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPW841900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2977f823bc0b53436c23c059d61e723c62ee6edac676f95af04c82dbf932895. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:33Z), 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/JPB602151658.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703547d85254b917b3a243a318d025d4abb3ef0cf03c700b6db0adac4ff06c75. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPB601204201.