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 0xfead2a42ae6bc692c4f711610889dd415c786da31dc9dbd945d2f8df0ed46f91. 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/2685f9f3-264d-4877-995b-f29ed7de6e24.json and https://artists.proofprofile.net/proofs/artist/2685f9f3-264d-4877-995b-f29ed7de6e24.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 0x592af4cc3b3e924c6ed34545dc7c05d3f0a1298421526df2a9520a87c5fe72c2. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AEA141703799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97666200dd60f88e8c9b63011e93106dcd81231e6ee40283420b8da03d1406. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AEA141705762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81284b9df6a996b7ea469c9680e9dec6d4c6a0bed819a637b6166281ffcdcf80. 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/QMEU31802060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d15b9fc3dafeb29762dca1218d84b989d0e5ce58eb568ed9e1fbe3bfbf4b920. 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/QMEU31802062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73c4b41b7a5f702444f9d5038536ac255f542f837c9b3edf2ff2a612fccac47. 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/FRX201958065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa7c2d6c6d6a4e9a433f3a846e3cc343c119b4c130bb49dfe41da40b3b5596. 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/LBA132201794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293e8fea43a536ecf012669775328eaa35d1982f91b45002ce26a6ba0fe50058. 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/LBA0H2006265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20311bafb91c21552ec41ea17a98a4bde09443d304b3d768992e9f28060d23bd. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/LBA0H2006423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1d41815c1c054f12035cf04d85aa698ee5e3f0d4e2e858b3f352a6e9befe32. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DGA082411968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d744cd4b1a9f68847999cdbc10a2bc59ce6965c1e0f68be4e96bbfe23ff11e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/LBA0H2010309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905869d2023bba90bb89fa6908a286137cf2e51685fc75856d8c8e6a3003888. 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/FRX282597875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c501e68d4ba4fe4c9c24aeafb33709aebc863fe1afcbb2d63188023a39666d. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTAW2587332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d54c7c07f5c9c311880a467a24fc66bbdedc06efc225e2b00412e61b1f091ac. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA052563011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2999a75b7115011dddd0143357972b0ca21de5259e378c62f44179955cd931ee. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DGA062512598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d54c7c07f5c9c311880a467a24fc66bbdedc06efc225e2b00412e61b1f091ac. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DGA052563011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614535871d58e04b7369e93202a8b64cf45b5c1dbc6292cbe8dcdabbff5501be. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/DGA062550315.