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 0x2376b397c96a9eb5dc2f5ca3a95be0c01a8c5f65c8fd7cc04c48ab0dbb6579e6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2d1f0e8-759a-46b0-89ec-e9df5c8e06f4.json and https://artists.proofprofile.net/proofs/artist/b2d1f0e8-759a-46b0-89ec-e9df5c8e06f4.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 0x341c19c7d0303f88e9b73121dc7894e72797a09c29f63d3c92801c8387e6a5ec. 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/QMMUK1400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf7ce1f41baa63431fa36a4a3e2c08a117d05c2647f09877f722e6ff70d90cb. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/QMMUK1400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9bf6a66656fcfbee2ced93ca9a178bc08a8718a290c8aa874a6c697b0772d9. 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/QMMUK1400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86f752acae8a9c90d4768487212fa753acb90a1bc5770deb8a9357be6bece25. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMMUK1400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42299991fe08a0f9585910ea7ce1a407fdc3007947a01277d2ea3356428ec629. 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/QMMUK1400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b614b13ce612b535fbc5e0b86224c076abaa2a5ce43eac6711b7e8bd4a088aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2260004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78757a145ba853c6d747357693703bf5a2a37ca1bf1087b2fc7179c6c311979. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6J2090168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf778b9e22322bf0de775a84c6b73ea0de279114098ab9620b5d1d3f5a94be883. 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/QM6P42197910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9543c164f169c5e31f96413bf89e777b911808ab292916f27f3d11c7955c4ff. 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/QM6N22135328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7436d2bd4c54033da838fa5d80f34c0187398e95d29128ddc1389962cd4a1e0. 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/QZHN32090721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba0335598e2118a12418e8bc7f9965f80af39cfb39a4f238f55f26fcd4fe90c. 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/QZK6P1906154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1375100e89e54df958c9de1f5a3af9d88daf2b9ffcc6b133f9e270bc5e9d8867. 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/QZES91946480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58706d6d0ec5d1e82ed329247719499c7d87fe88f75fe0e1b97c676fc21590d. 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/QZES91946477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf39af2670147facab1a574f6bdfb1f6a6ef906466d471735e90fedca4d3078. 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/QZES71913180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf39af2670147facab1a574f6bdfb1f6a6ef906466d471735e90fedca4d3078. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES71913180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754e3602250040ece2de9d0034ec1ba52e88c694814ec9c279cba9ec0da821ab. 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/QZDA71911517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd078d91a250a13cc1c64a0b80019f8a1ec470bb390985b4199355cd25292127. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES61803844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb455f1ead25cc1156e14900429f22387100c4c48301ef82f8d298fbd9467bf. 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/QMMUK1700499.