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 0xbe4c0da82feee146cbc6f416d74de0ecad94631b7f3f39b5f3dfcb371bdf4a84. 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/cedd04e6-59eb-4c0d-a878-636402608c9e.json and https://artists.proofprofile.net/proofs/artist/cedd04e6-59eb-4c0d-a878-636402608c9e.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 0xf9b98221ccf3ce8acf60d6c866ee4fe39220323dbb87801c6913aaf6c5d41ca7. 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/CACWV1734880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781859a1cf495a02b2590d92245ad6ed178bea3724609dad1df083f22be761ed. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CACWV1734914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852791eb432dac7f543755bc5f525f7612b6a76f1cd89837fe1275aa83691acd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CAGOO1872040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9fc9da63d4e8cf88c11ce9f9ec167a39a9d701dbe3349fbcca53ee1ff71fbf. 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/CAGOO1820603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912c3afbdc241ee416d3edd8cc0964092145d93955ed6e41e441f2d88b78721. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAHQJ1848396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4c7d8a216209f24d695ce91a02b2ba7c1c572d866094c31370b523687f4be8. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/CACWV1928363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d028bec2e088718d1f8d323fe21a48fe4f4c943115ad637f570e0e56743a2f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CAENV1954143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e35aa07b4b5b4443f8a52584984f15c37ecad59b0961bd117e339b506e94698. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAENV2064097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f0b7dee1ea8c4ed49c0125859b5a943d479481b99c72659239abc59de4a128. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CAENV2178528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6037b05a4b1d882c12b1d7f51b484455a56a5d8966d1095d2f60114ae1c198a7. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CAGOO2133967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce322728e27a72ef33cf0f16a4c0e502985d2af68a9b591333ee1a9cb0f4b1d8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CAHQJ2288908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed243ed2b3fcfe0e85f6207e39f999696737a003a130e375a2dacbca8fcd624. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CACWV2398030.