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 0xcdfd5a14c79d00469c2bb6db31e0391a325e07cc27cda2673c437a6fb03b0988. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a023349-77c8-4e5a-9ddd-fd064d3c1d52.json and https://artists.proofprofile.net/proofs/artist/2a023349-77c8-4e5a-9ddd-fd064d3c1d52.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 0xf8969494c657cf75b782accb7f38d318b6e5e775be4d1852cc8aa3fad5864ba5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CZA163368163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aefb7b5deefc59fd43b5fceb760a17612680c90ff9e1799dd82fcb2a1dfb42. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:37:33Z), 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/CZA163368165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70cd7af50aa6f36f151e2c06d98ae8be97f634449546a5afbedca402640cd71. 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/CZA163368167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d82e2c5d67f17fe21e9c5b21a76146c8ecd6025c30abdaec762df1bc5b06ecc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:11Z), 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/CZA163368168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc294820da543ae1f1c0e79022962e85fd7043df287473438cd4e1d88754f92. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:35Z), 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/CZA163368169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9096d4fde268991d052848f15ea3e9996036c232c8bbbbe86aad1803a9ea75. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CZA163368170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c17e1180d814584412bb5e65caff6ca6c0aca4a2d33098068541e4a3558f53d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:17Z), 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/CZA163368175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca44a91dce529f27058dc46e6248caa23c8fb3b0b10ddf9ae6cefd4fada835c0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZI062400100.