thumb|Aerial view of mesas in Monument Valley, on the Colorado Plateau thumb|right|Har Qatum, a mesa located on the southern edge of Makhtesh Ramon, Israel thumb|Ingleborough in North Yorkshire, Engla
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 0xff770ded04d1cc4fb9cd89b8199d8e425cb25344e95891cbed1b493c998f762c. 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/835fa263-206b-47ae-9443-ba7b796ff529.json and https://artists.proofprofile.net/proofs/artist/835fa263-206b-47ae-9443-ba7b796ff529.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 0xc9ac899829062dfe210c3abc995b9dfe8b6d78160cb78f23d8544fc7690e4965. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCACM1672938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17eb833a7a5168aa9ba334b9c8cde422168eb95341c948ecd8cd3fe7741f3c2. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCACY1722297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a5486e07e8ed242721eb835ad2bc869cf13afcfbbedb91398cc4c6f8ba4b52. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:09Z), 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/TCADG1745016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e820bfb91e4c4e3f963334d33a42cde2ee12e654e3c195dee504e31a2196b3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:37Z), 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/TCADG1780291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62c72b143231ed8da7ec01f87c0d45d0cb92325aab7fee06b92f8283330906b. 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/TCADS1873394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb98368229341c7bf9b10ca2f967402c08440f3f5513bd4ec954cf87489e449. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:32Z), 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/TCAED1999914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15be561a2f049e3289daf8dcf969e1feaf2a5644b9263aec86325863d2794cc. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCAFK2135851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e1a4750cd6bcc28e6609925d84243b8482e090a1db2c8f516edf426d7d7475. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZW9K2288970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3229fcb314f967a634a05fe3a5a18a2a246bcfbf926c8b1005c5514a08c1e724. 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/QZW9K2288670.