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 0xaba4997e139e98d289df010a9c337ffceca1b82d2fae8ae031d4308c892b2fff. 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/e8e2416a-fe13-4509-b50a-61af49dc3b2c.json and https://artists.proofprofile.net/proofs/artist/e8e2416a-fe13-4509-b50a-61af49dc3b2c.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 0x935388b0b9be78f65caa63dde4c2d90a55e2f68c50fae852cbd077be02d567c7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USANG2444519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f2c2b2f2ff9845e0d9fa0943ae9b7084e1f877745c897378892374bdf5b737. 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/NLT2H2555240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee17c8fd753d092ae24e123f1e00d2fec5d04204590e698d597c16e8f97d3dde. 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/US3DF2542609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a267e6c155547021be42da70400f5c295fa9909adfa6d63134bfda3b8169d0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2504056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2b61733408a1f41b88def407306f1c311b704db5c3784b4229a8bf835291b4. 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/USANG2509552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb5e6e8e41c1bfe491c04cd8fc724a8f1117aa7cf5e94444cbc1afdbe5746c0. 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/USANG2210399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91884cbec713c0532a7732b1e9832052c8b98bcabbdf4b4e0599d5e9843de51a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2226706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad488aef15b13f085af42894ddc6517fc618391116c445314f11eb198df2f56. 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/FR10S2427084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3db6d5bba7546259c2a3a60b9027bc08f6a11ad45d085c2b263534d8870fe5c. 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/QMANG2235821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb227690438e7d48bdb4640171f456b0ef5e29833214503ccc1f0224fcd12b595. 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/QM3DF2296707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad66e9bb07f7620e0cdb5add1e46b8fcaae74dc292a86bed75a324fc48403b5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2289252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1113b474b76b45a7f3db3f6797a707b8b81d8371ad99738d25f105c600f00788. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2289255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d231b30b5578b417f3f9436e0d0510588662036a89f3885aadccd6671bc44af. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2289256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7056a71d2e92a02ff02c3743d2c5779308306b4a7d1378ed9417d0994a903ab8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2289257.