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 0x29cecedf9cbd1e6291d43e1e196d11a578c2a5851ed603fc7cb127333e21ecd1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99eea0ae-ada4-4a45-a6f0-f8170836cb7f.json and https://artists.proofprofile.net/proofs/artist/99eea0ae-ada4-4a45-a6f0-f8170836cb7f.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 0x8a5cfa143891d2334255b602c8d02c4b40a6b64e4ee6f8d759b0a440088706d8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CA5KR1835076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e58fe1289de27355dd819a9da2ab9455219e15497486241e62ab5d6ea56c146. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR1835077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e394a3cd2a38577fae1e397839840ed32be281f509ac54fb9ca8227eecc87a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR1835078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66424683e8a5f989a22c83b169e50f51becfdfc4de01dffcb0e5f2f528abf675. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CA5KR1835079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3762132594470aefc5829556cf31c058dd875f5fca3fd2c9184922614fab56e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA5KR1835080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4392bd4029f3e6098cd22edf9d25a1314f992202f00340c0faf4d306c85d7524. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/CA5KR1835081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47028e4d30fb3dec4323545779a2bc8e4662f707e15ce3e3e00a2490ede05811. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CA5KR1835082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23cd4d2bd672511583256645a5f9f224db5faf8864342ceaa974c583fa5de18. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR2004820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22fbfb30365eb494a65ec0f793f4c8067284236672b96f935d486c038e40c74. 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/CA5KR2004822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d37aee812f59cba28bb6934f65c8ec4a8c68b4252717c5e472f074b16f1c43. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/CA5KR2004823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7c34384a21daa48bb4c8e07f638aa50cf9f0b33e4e66c7e3a09aefd7f4606a. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USANG2028228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6fbbbffda79c362d957ddad732874e154f5c77e708a16e760a5630a42da36. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CA5KR2037224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05cabf73b5929c5800f98684788ed22dd17cb1fa527b905519cb7d19a8be8af. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:55:23Z), 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/QZW9L2248921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c9be60fb980b1afddebc6a3667114cb1fcb1dfd747ed6152ab5782dd087afc. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZW9L2248924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd722bf471107dc171bf9ddb78e449a814aa2b4824f70924e6915afcfb038bd. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZW9L2248928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376c1b563efc0a271d198e796ae68729e02e4ea43ca6567b45d13650532ece7d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USANG2030723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bcb2cdf279e2d32bdfcfa9e47251162c0da6aad9fa56706b13eabada9be4dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USANG2030742.