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 0x2d353f8e8b51b979796d9f15e1a62267802e0d6d75af585f4e1813e2f5fc02e0. 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/3e42cb80-1252-4281-9e04-3f6cd7157965.json and https://artists.proofprofile.net/proofs/artist/3e42cb80-1252-4281-9e04-3f6cd7157965.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 0xc73f2aa6bcbe07ba3756f2944a500082b6165535f322bad924746845b7ae54f1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FR6V82519859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9ccc5c4909804f0ea94e7854652d4bcd3d26c57d61e6be24e982d60c4e6330. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:55Z), 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/FR6V82573003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ea7c7756c664c9d6ae346668302843b71cabcf73d7ccd1bdfdb7eda46e655. 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/CLEA21500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8762393037d23e2e2486e7e9f55a36f2c9fdd8c23f24f688c42988fa11da94ad. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:33:00Z), 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/CLEA21500585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec81c566facf5f2ef49c2e4d34bf6c9ac1f4ed662dd0bd721a299e0829728e9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CLEA21500588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74982dc8c962fad76492c6bd29f9da0a565f180295c56bb3ab7e30ba9b47bbbd. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CLEA21500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4618b1e4ad7c0cd95b487e5536c3881962fcb648794731cf20c1dd2229a44f8. 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/CLEA21500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd513f030b599f2cd50d2a01dacbd3cb9e2aa15c9c4dd5bcd10bc50ff29e3c8a1. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CLEA21500587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41146acdfae3d36eb92bd79ce45ba245601e5703c70dd9a6ae5a0e987a69362. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CLEA21500590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ffd42a861ea362b9590cd0306b65ddf2fc19f58fae3f5198f94fadbe7b5e0b. 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/CLEA21500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf7e29b91c501164677689ebfefa466fb3b88e3b938b84c31a8f74924bed7c. 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/CLEA21500593.