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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42845e712ffd4c489781c86b0f73b6e00eb2a312dda8a346772bcc65a0ccc35d. 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/d46196cc-ea58-45bf-8a35-ac8fa4a16018.json and https://artists.proofprofile.net/proofs/artist/d46196cc-ea58-45bf-8a35-ac8fa4a16018.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460feca61e56c8522329f94ddfb29b2392727c1209b2dd5f4db7d8d690973f62. 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/FRX201826626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cdc1732b10dfdbe2289bbb47a15e61111c75ad08515c712f21251320a79168. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRX201826629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff90648b9b0a87608d25ef9db45ac7912114554bb2a933954ce4f7b6637349d8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR10S1936523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa357529af489efd1d085f470302bfd2401a5defdd1b04881f2179204f267d0e8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR59R1942700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e74189bab6c4ac73bb7c9d4a172cbfa37624d0987174bb21bb82cf5bd0ebaac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R1903682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a29d450822394cded1fbf55e98f6f02f50103f57b1cdca40f1e2631f66b5754. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R2007750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd17059bd17cfd7d7fc0f3244e5482b3fb0daa96177381f95968cd4d80987d7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR26V2029767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab016cfe128ad7eef5960d3f0c8cd615ed558441c47bf98556c5f58c92afcdb5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA072161896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b3df02c7c56e93cd488569abe2330172e73fcad535011f4e30ca140c727439. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FRX872101780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0bef878ea4a41fba944e5384f6115f1c2bf98b7beb63c2db1e809bfd8a0e65. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR96X2210503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4d78f8f77015242b979b4f35d39b8b5ad1fb1c7829b3878a6e9e5e13a7392b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRX282479975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759c9955c1b7e3ebbf97b9bd35e16f3a784971d2b8a2925307b8bf6118121419. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DGA092355293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c535c908f85ae9d1e928cd98190abdf3cd45831e6e089fcc94423087a4a2136. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA0H2411631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896cfdd1ed150602b4e6943781cffe17213a3ccbeadb8102fee78a6862c7ad3f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FR10S2567415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468fc3c1cad5a4a01d80e037d08be4a6395ebb8161952f50308a04ed5a8a3bc7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/FR10S2589635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cedaf972e873399d792006f3ea35f6b86e1f3f35165adadd7277922367db29. 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/FR2X42595353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b49dc321d67d020ef9bfcff6834a1cc3558a67e2dc116fafb02f9c188058265. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRX282517676.