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 0xc3f27f723c27be0b31f9abb580449c3e15d64ab6345b030f916a672d88891ffc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1111a48-1c30-4fd9-b26b-2ecd0ed2a106.json and https://artists.proofprofile.net/proofs/artist/c1111a48-1c30-4fd9-b26b-2ecd0ed2a106.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 0xf789c0cdecf12ea14940fa8cc398eb95a20f7dcfb2d57e33865b4c6f4969dd28. 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/QZS7J2455556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c737beebdb016567c54233d44068e48cd993ec0a8566c901208aef9de8614e. 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/QZTLA2478238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f5a02dc4171b7cd24a7800e444d13cc7c618fa9d9a6bce783a9f4227cfa73. 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/QZS7J2416060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b723b14ec9ca5720867a46c6acf0b6d9fd8b1339df7ff41f9a673ca93b35500. 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/QZQAY2474985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2151295c918b10ec12b54d56d0f7d7aaa60b6eefda9a796946e76c2ff5648316. 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/QZQAY2418524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337cce2849bfc7752f8ddac5ff4f4a4c7c9af03d69e3a4a1de1e3a38dc00d67f. 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/QZQAY2447797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd047c6815642d74403d0b5944756f00b6dd6b5e2789826eb848ea452630d9743. 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/QZQAY2495294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15621b6523952447a7b913f6ed07c79090425b71b9c8ac72c1730dae260423a0. 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/QZS7J2475410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e31a76ef15840f709455f8d6f0127c3410da5a2ea06a60f0507594d6480e0c. 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/QZQAY2438607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b723b14ec9ca5720867a46c6acf0b6d9fd8b1339df7ff41f9a673ca93b35500. 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/QZQAY2474985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa256f6c605330dc7c51bca436d81d5b9175e156e2354bf5b210a7dac9de264ab. 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/ITTV52002107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033d9a3163a2c0e6685a349bcd97eaa09a70a8c13bdf6d30b298e273223be1c7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZQAY2458441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf789c0cdecf12ea14940fa8cc398eb95a20f7dcfb2d57e33865b4c6f4969dd28. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZS7J2455556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4b48211b804c28427916732ee4aefba2806156b205e4e1e5af332b5d9b16e2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX73R2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5055620d30e0188b101644948af695db1e5c427a4c93d18fa8acc841df1d637. 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/GBCFB2000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8a4a6ba0062d7bd070b059fa4d2a9d777a6a2ed8f47e2c2b16086ca4d588c3. 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/GBCFB2000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3dac3ca3b92bea22d8b75be63a2c570e6d2f9b5a9538db6f5d21a2e427a308. 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/GBCFB2000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2617815cd009d202e23ca78ebe50f8f9c24f60b4dca10b8e219bbf748468a6. 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/GBCFB2000144.