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 0xc5be65cfcd286bf8e36cc66f3a13acd3e8b6551fde9971704b9d866f3df1835b. 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/6147bb71-a932-46a7-a937-1eceaedeb301.json and https://artists.proofprofile.net/proofs/artist/6147bb71-a932-46a7-a937-1eceaedeb301.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 0x4622f60c0093bc46eb5f11392f94525fed46867065b511385e27ffb730a60265. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ62039576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e28b569104f9cb3907c907307f674e10078737aecec819c3c868e4088227d73. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ61927825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4268218b1b570491d9ea428103d667863edf52c55bf54f31bd9541e154192197. 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/USUYG1212698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1ee308a9b729cba9d62630b39d58f8526fad044805cebf3743af6cb232783f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1212699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aa4b8f26d10263bb8bdcf044fb8480562d76212820dc6402f6fa6412f38e10. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1212700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d5e7d2e7eb3f4272e817f848c1993a3ed03d04f6a67b6e4ddcd678447559af. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:09:31Z), 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/USUYG1212702.
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 0x8f554eff6bb83d918da8333c4bda009f1674413c6c0d24d91e19eea714af0da9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USUYG1212697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452404ce815e025b9aee2963e41ad1ab2067dd9a351c583f3839ef3b61146a62. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USUYG1212701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee9263cd237d5e24671eb72b024b1ee4cc37a8eacc4690e0e06b95ed1c84b78. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USACX2400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df433c7d2fd17dc5ee468efac96173e35848b599140d2a15d7417dd95e7b43. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWU2461130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b0627f2f585798664e153baba0678322280a3ac0165369574e15d0c268f60a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USACX2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64273a8a11c1985b65d61b3858e08f1e0c58124722345b810f2e0cb30c4fc3dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USACX2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c6f5843343fb47d08efe2b0d6f780b96afbec39e4833d3cd8c17a035cf8f96. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES92416518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625c8a7b56e970ce67aef2d2f9ee9e4d3949acb5ad1f33deacdc1faa8c6c6526. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82436211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c7787ffe7f3a16350f386238f25aab2839b4a7b7ac7c7b39a2adb2b27fd099. 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/QZTAZ2301624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b720a36afb12c864d2027b7e447d805601542e10616172bebdca90c66bf074. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWZ2360072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8649ffc13dcfd037418b9a2c30aac7d3f7ea04e41848c363568ff6eddbbaac. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1503404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b5c400c2f584553a8929b0fb4712f6f4c716da6953bca08d5035f4e796e455. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6G2235933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dfc2b74a2a9f0d18c855a22a01e3e0e43d577d86a9e5007446b78c687afd9b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN82292066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e87b7a566d3c6a1b560c4547657677864f83cf75ef58d270c15f3e22de3fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ62240770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ce62a3eae4c839c5898369778f0ae987dc49420337d96dde8a2322cbbd2485. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYY2207047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58568290556f908c7577b1eef415ce2dbf2b151b4d583720b0c8ba9efc457264. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2138755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f30b39d223e3c915dbc7ea4d6cf3376f0b014a30d87e97c17d382b760b3afb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFS2132507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1485561988eee36938d92d60f8a386a5fadb845add8acf7f01f48fdafa1eed9c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ52139899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fcd0d6ae3d75e4c729f6dd9f4f0d74df914fe5e742f2d9952ae83829b27104. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYY2172107.