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 0x785623eab42e5dc38ffb16c1a727f618304df45f2d6f1a0d2ae37e6456aa7ea9. 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/f18c4912-0b44-436a-9d75-73f28309ee94.json and https://artists.proofprofile.net/proofs/artist/f18c4912-0b44-436a-9d75-73f28309ee94.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 0xb0b487b92fb86350589a195636cfcf61fb59d37a50ab6d8a5406a18603fb3c04. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:42:22Z), 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/QZHN72136463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e8412fb813ecc34211ac7c86b04a79c21e41bfe908028beb5246e924ec12c8. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:39:48Z), 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/QZHN72136464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba705144f8bf20daf22409b122421b47caa26b276a9b3eda74aeb024126de45f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWX2151754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3defd654618bc940c0a79f6c62f50c42ca9fa1e649983174dd428c167d27dabb. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZPLR2114530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfdd47e7a68965247c06d5cebb5cbcf77659f56ce59b018a25eec98f8a04995. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:08Z), 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/QZPLR2114531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f805ab1552da57e4d36d1bc5695afb7daa987cd24c9e56a35637baeeb8ac2f2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZPLR2114532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0231bdbf153007e9263ec18ff7e34f1121f9934d05e7dab386ae914988e4cb. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:28:27Z), 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/QZPLR2114533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377178811d452a598369272e4a55e4c8c3f23f67f95c23e7fe30cd2fc9960b83. 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/QZFYX2202853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf759b2913d130eeb5826552b11aa86ec99566f5668369e4b55e38802093969a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6K2295814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb009dafb16bfbc757e916b206f2af78266ded0d56e3bf160fbfb00eb40a42bc4. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFYZ2399988.