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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5617a0a9172f784bf07f6182e301537c2e62af3fc1cb5010fa9a70f1354e41f4. 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/ff9f85a4-c9ec-48b4-90bc-11c9bf80cab7.json and https://artists.proofprofile.net/proofs/artist/ff9f85a4-c9ec-48b4-90bc-11c9bf80cab7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeee67b0a8b76544c6af92f3b5d98a1b9d54fd3855511f2008a770e72fb62bfa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWX2252377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18587ae6613fa39dea102e1f40a2aadb13673c79fe72ee24621c670854db7c35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWX2252378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2263dbf3fe629c926ff4ab6892c755f6ce194d5174bfa08709acbf75a1245940. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAT22000641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50e6cf8b78d9d5099737563fee3599336ff96e0de15eee5458267b5971c5d1c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT22000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb062ed62c42d12ba04b60125ebd22e9af97b379f0826fd9c0d8208a91c91086d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAT22000642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a95705b19a07756b3c9d5f2b261a2a461500ac67e8a0a7ba70973e03e1c17f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USAT21904929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841393160096954e6456700db6f9805eeb614945de7353b897321ef6ccba71b2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAT22000643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61c41c7edfbf157842d4a79d240eb6faa177fa3ed54b8fecd24b41f2a1dc27e. 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/USAT22000644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b197845c0fd51448016e41161952e0548fca7a2cb20207edae52782112bf5f9. 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/USAT22000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48540431d743bf083e10de982327767c6d9a3bcac316deeebc7b77f5759874e4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAT22104089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabb6c59ad77d09ad328d53010da2c977c00d306e19292cbac9bc4b95a13f3bc. 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/USAT22100900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcac511cee64fb96896551d0180a981f89d8c3b5585466ab0a61e3a1d06732e. 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/USAT22100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996a1300ca75aa5ce8db529d4b8f4d2ad77e8b501fd842092fedcccf3d0c2530. 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/USAT22007774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50e6cf8b78d9d5099737563fee3599336ff96e0de15eee5458267b5971c5d1c. 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/USAT22000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee0f3836c554023560ab5775f0825be2036182a07ffbd866af71ba5d18791e7. 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/QZHN52149601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57587a4d5a75e844f3c104b624cd35bff76479545defc0696d6df3800e19be5b. 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/QZF8N2183049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a72a496837ca933163f13b90d17b653095cd0c01a4f3a4867e83189aa24a6dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSMU8447032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29442e57716b00cffee748c3de00724adf12552fa7a9034036e65236210d3c43. 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/GBSMU8447041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9c85f74b789868b429253d2b64ab8178e9d502244e1af90c557780ba58d73a. 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/GBSMU8447043.