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 0xe532a1bc8a254333770d89c6b5fcb0fb6df1318c9d67b5955f775d1b0778cd84. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71d5c15e-9b3a-40c7-8561-b20bf21d80a9.json and https://artists.proofprofile.net/proofs/artist/71d5c15e-9b3a-40c7-8561-b20bf21d80a9.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 0x88ecc59dec3a5a4e2d9d0a0fcf373532717e84940ebe6efb71a15de24a04fe00. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZHN92414135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e128bd55c702d395859e5a00ed0c82101c34ad401d06ac2e653b08514c82697. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:28:20Z), 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/QZNWS2448185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130cb37eef9bd2736c2657538cba6383ce0c4e630e4c19f2ad6f6f3e3e1e9f44. 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/QZNWS2448187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a368229b3b81c753e9d1bedb39ef3aafd238434f4dedda625516f72e71c03e8. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZTAZ2469840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193d2ba284059460feef1d721db67ed0c1604434cc2174fd33fd585cfaa8e02a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBB2420051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713f6e3522a2842160d49de32181117be7e8d3d08d797c5fe648a8a8b651abdd. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZZ7X2456138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d26de7cd68c5176f9cc5c8d0a0a5430f30e7874b0db959a0f95c12dcb6a9237. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:45:24Z), 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/QZFZ42508052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacddbe62e4ac25f7e053b9b814bef3b8419807e8ad3b9ff660f41c047d3c855c. 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/QZFZ42508056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2cbe14b86f91af0caf3e565aebb97a537e1d0de516213f9f896981f7fc166b. 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/QZFZ42508057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1dc92bb72bd195789199faedd2d657550cf309da3e6e86c1094e0842db5ab0. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZES92582362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f92fd071bf5ec03b4a16fb6116f1209a6b3793628791ac644637a806a6156e7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEM2531632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1621d574ce7eddc2cb98917506745ba978d5f240bb4afe3ed167ef25c6ce7b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEM2531633.