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 0x7ce003892ffa990822ab750127829815f36bc7b805c7ffdef632aa68ae60b73c. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ea42bed-2368-4171-9dfc-e86734c91c1a.json and https://artists.proofprofile.net/proofs/artist/9ea42bed-2368-4171-9dfc-e86734c91c1a.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 0x6b926df5f69540ae578bc72fb6bcb2e2f53a6e37fe5325bd101499347451bd7e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ782584897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84893f9988018a46cd3b2ecdfac935f1133e34966da1590bcbea862d3a9b0b4. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T07:28:34Z), 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/QZZ7P2556545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6618cf3957b2defe4f7f023a156a3de2d874a4df6d5bc93c4444bb692cff7ae8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:24Z), 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/QT3FA2522405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b55bcfd5746f591322db8074c0b5fbbb280b718b477a631bd31c7356d3911be. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3FA2516613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0d276e924cbc7c6fb113832e06106163c896c6755c3d9b83cdd27798a17450. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:16Z), 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/QT3FA2593643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e52adafa8a29770ee42ddb0cf7b6f21c7b186d754eebf496ce850c6917cfa3. 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/QT3FA2595693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83585b76dc2708fffe7a58de7e2a8e275d4607970ade5b3e48bd1e22dbfa30fb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3FF2513391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6df33e528e320bbf4649948b12866f59f8733e6cd7f165187390887e8a6b16. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QT3FF2515680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aed74c169ee25ba68f46855630f3200f2c18c2589fbadf425ba79ece5220ea7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3FH2504612.