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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 0xdb6c47948f60282c0128be2e03e0016a485e367948b8d5ad05030620b83074b7. 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/1bc05490-fb46-442a-be07-f88c16842c79.json and https://artists.proofprofile.net/proofs/artist/1bc05490-fb46-442a-be07-f88c16842c79.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 0xae74294a2f146c71c538a52ad3829c0669793f6ef07de9e063c83f5dc3c07f25. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DKBR20600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8c6f2186351f9025f14aa198520c44d3d39ae109debf36eb45f690fa28be7d. 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/DKBR20600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43867e43e5e9dad72e725bd2b0a0eebd22a70c6d6497e631120c9f7a818dd345. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DKBR20600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f554eac92f3faabd3fccf1a84ef9331fae9a4ac0ec867ef02deedb0efdd7d. 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/DKBR20600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3308b42f371ec9589a83c8ee3509c721fa5148ce24df994aa2a82f15ccd115. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DKBR20600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085d6dad7d7d1cb719301b455f0b02cc29be1c814f9acf9ba86dacb906d615a9. 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/DKBR20600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6269cf4c62d8a0ed20b08bb87bbf68ffaf793397c40684b46a6c067458a240a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DKBR20600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a427fcaa03a33af64dd8fd370033be6f87e7379c57133ed0a6df7b0c557364b. 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/DKADG0800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6397b388a9a3db84d2f1ae53321098eae409134427a5c2e42bfbb0ca75e5381. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DKADG0800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4fb396929fc1be731bf602558fb412ccc7b1dd3f6c65bf973a2a7e5ae07a39. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DKADG0800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08df7f6fc068a38a303933eac093c2f6ab20e50ef6c33a6ce8dd29b4dd12f14c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DKADG0800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0d1098b6b042226aa648d33ae740fd8efb94db4f3dad0b8e1ad3874d0e0b21. 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/DKADG0800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d9a4eca50c7be474815dfdd0ffe11f94a1a7e3a52825abaf7add8615d4a79a. 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/DKADG0800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dbc2429de9fc99da85a38f0794d74f5a6e49960634614092e243409cbdcbf0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DKADG1000400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb9fe72a189074b1b91da418dfcb7e7a2c820cf9e73c08ebc3ed5a609fcc774. 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/DKADG1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c5762282a28c9443ac63fea1e1b90b0054f56fe3a3439e83fcc77fe15db623. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DKJ421800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e8dc385ee25a15d838f8bbd5fb5f2577f8fd512850caef436061bd75424cfc. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DKJ421800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7bb8d912651e53a413f0b57120a6d0c1d072c5daf78df394897d41b1dc37eb. 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/DKJ421800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf22e14f44cbea041896cc45ad279f31541a668783850329a9e9582d7cea68b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKBR20600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95a7da8f65d68cb3905c2e5932be089e8633c225ec88db3530ba7ae372563e6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DKBR20500701.