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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 0xfcf905d1c3ea47f573571b236d2632cd195647d2da34e5c506fa8bb15b797478. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04bf23e3-c0f0-40f7-a9b4-664c0a966417.json and https://artists.proofprofile.net/proofs/artist/04bf23e3-c0f0-40f7-a9b4-664c0a966417.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 0xdc69e27533578facb041203e6a95c06f0555dad6a8841a9e442f710cffee3f8b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBLFP2215845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161654ee4104fbf5fb6aeda52da9626d5d6985260630c665b65da99c404a336b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBLFP2215846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5966f90323afd24adbe49710cbba0d2b691ec517808e7abeced812cdf4d79df. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBLFP2215852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca99da5f37684db7cabe2172dbcad30114fee0331e91dfcfdcd20649a73bc9d. 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/GBLFP2215853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abc00384afe1abad7cd539c8363769fe9763e082294bd7916696459b47d8d11. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBLFP2215860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161371afe3994ee16f8f3e9713ef99fa50dfd44333f80ddac0b47719ff334446. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBLFP2215862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79843011422c5d468642761e2b73f0c3463d1d123401d90b80bfab927c5daf02. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/GBLFP2215864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7392d007aabc361e4faef0e2c926288dcdab716442c00c943ebc87fb559a8e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLFP2215866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8095bfe5bf36ca8e7555e0a2de28906f7863b4acf0a91fd749127f915f0a2d33. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBLFP2215868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b64eb283135f6072577e32a5bd45ad4521a1ede46c22e4fde936b09b5e1c82. 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/GBLFP2215870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef781c39b22860b4846a5af01e9b81dfcbd12637644b297512d06433439ed583. 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/GXH2J2593220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91cf6968cbabc12d18ae54fb714a75fcf9a68f9590e57a74f68460d6dda70b4. 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/GXH2J2593221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe8fee7b2ada74124357b36618ef992fa9a55291463658ce23fa4d1b8ed4a8d. 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/GXH2J2593222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff2a7ba61f2f751f850871c3b37d4f37ce3573e38c001447872c59c1d188285. 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/GXH2J2593223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a09e07851fb0087450b8dc9471f24b63b3921088b6688bb8dde3e738ba50a4c. 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/GXH2J2593224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014c68a8bc771e00a34aa94554d8ab9930e9193cc4f769c640809fc1f892132a. 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/GXH2J2593225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a32deba9520afb8d50490bef24b135eab47e376bd4b63f33a53040cd561840f. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GXH2J2593226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bef5ebbc138acbfebb36287635d892feb881934419a3607467e79ea10cfa7a. 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/GXH2J2593227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26acdc36773647f4e00eed4722d067aac8082a65d1e6b16b03ca1023cba0e6a6. 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/GXH2J2593228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab928ec9fede132531046c72fa59ada428c67dd77cb11d917c5d633d5c77073d. 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/GXH2J2593229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19cb909f38e6793a4c3d605036247fc737c9fda06088acef4aff45f56f07509. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GXH2J2593230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cc2ce2462d632ecef1aba0b2a5887ae51480d71b6875955f62534e675cbd9c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GXH2J2593232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dc5e3dfd1e9cfdc6ae2ab6905f08d8d33e8dc722b865f1b9405368ecf81651. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GXH2J2593233.