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 0x0ceb3202fffc0766ba0b6c914d2dd7103df7326d5fc6a3d4207097cbdc521893. 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/0713aba5-898c-4f00-b7ac-90d3164d27e4.json and https://artists.proofprofile.net/proofs/artist/0713aba5-898c-4f00-b7ac-90d3164d27e4.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 0x1c25835c6169b09f97aedfe570bf8d89aa8440417f716dba2be05f06ff745cae. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEM252103041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894a10d59c057151a5471edcf0268659f78de0f91b0941790031f158b5df885f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:06Z), 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/DEM252103051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04261553e9244f20a5a7a04a369b81cc3afe0e1274ffc39297e17d84ae7d6e26. 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/DEM252103071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf715e0b8536ffab722bd017cf9bd4065e76c1632d01e800de014241dd6c354a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEM252403011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64e6a3dbfc14a8ed377b9a9a778568f29be6afeab128bd075ce493b70ceb0b9. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DEM252403021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22a312013ff99e3e467a4078eb8946c6a1a3ede2065a04d1d736487cb704ea8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:43:54Z), 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/DEM252403031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac8dddfbe23fbb1cc6de2fa211b4a33c621111a69a3dd2d687b5df0fd293915. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEM252403041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7277d19de97bc62d3fc7757d3e6d1ab8a590c4a4b3c18b7fd9d71e4167101435. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/DEM252403051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231c6b3a481888b209b4d69e285e2a5bdf4b393851231927abf6591788d18917. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEM252403061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd28ae3caac68ad035e013ddb9acd239f9c9d7ca3a092628fb115f2e1c965f3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEM252403071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf715e0b8536ffab722bd017cf9bd4065e76c1632d01e800de014241dd6c354a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEM252403011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64e6a3dbfc14a8ed377b9a9a778568f29be6afeab128bd075ce493b70ceb0b9. 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/DEM252403021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22a312013ff99e3e467a4078eb8946c6a1a3ede2065a04d1d736487cb704ea8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEM252403031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac8dddfbe23fbb1cc6de2fa211b4a33c621111a69a3dd2d687b5df0fd293915. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEM252403041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231c6b3a481888b209b4d69e285e2a5bdf4b393851231927abf6591788d18917. 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/DEM252403061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd28ae3caac68ad035e013ddb9acd239f9c9d7ca3a092628fb115f2e1c965f3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEM252403071.