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 0x2ebfce4a101b6330376765246b78053ee94b7a300b809e9b8f2d8b90b675397d. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31bdbcea-b191-47d6-98c5-b6abdf67c055.json and https://artists.proofprofile.net/proofs/artist/31bdbcea-b191-47d6-98c5-b6abdf67c055.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 0xa7093f9d494d79ca9c5ceee71752cd54e7dcd2e4a6beb91e7c384480bdac14e8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEM2342950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53d24f3a39f18f74fe481dd6387e68445b6107990c7f40e4dba8ba0a5bd6e6c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPLR2367221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926293d46b7d6b8992ba8f2005e91cb7acd1f81d897685eee4aa7a1d638c42ec. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWQ2431009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503b3572a14fa7c219b01105f173722884920c9132da0dd70582e1a3dee73dad. 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/QZTAZ2453179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54df760b40a744754c75401952f71f5eda1b6a92ad608b549f799292c16308a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:52:30Z), 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/QZWFJ2471128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d1434de7f4f316ce420b91e5f1c2db01935cbc95f3e2f0236085e9134c392. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFJ2471129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddc644e27644ab7c9d78afa7480c7a736f0c4f234a32c441fa4fac28544ff17. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:33Z), 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/QZFYY2587795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd583e83ec7336592969fde101603e3beabab3261ff5a05d1f22c7ab51635555d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFYY2587796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7fada3d1ccbd74c2edfd78978fb3ac23de9054a2537dcdd5eab2734b83dc11. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:43Z), 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/QZTB42508503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a93978d686298f11b66d97af0c74798fee398ded2163350f3f5f75bf5ac1e8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB82570318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652d66711d57bef05799f120a5362c09355f8df4aed9af3c7f01d2ff1e3a1d13. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7L2556704.