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 0x4ac9ac834df6f66d7bc42afd5be3224877d0bbb1ce8059a3e7aa657454a0e138. 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/038284e3-b555-406f-bf9e-371fc02c16ea.json and https://artists.proofprofile.net/proofs/artist/038284e3-b555-406f-bf9e-371fc02c16ea.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 0x7191f1d8b9f0f94317bc752ee8f7e07ca708d7a0c1ae6f207cb6070a686f2f53. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SE6XX2206616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd21bde40cd964b292527518aaf7e673edb3fea74d1a8159cd6e164a0a5d88e. 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/SE6XX2206615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3de14165138563833a52b3fcfdc2fd4c4ea5a54f5786a40337f366bbba82e47. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6XX2206614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6395f06ebf708ccc79f2e9c5a10c3b7b30a348ae38ef669d2b72d00c9d61b18. 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/SE6XX2206619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9b8ff7df22de935efdd13e91c377afbe97ebee87a270479911720a86b44fb8. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/SE6XX2206618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2759b55681276a8d8690f9961e05bcf421becbc67a059af5c3c4f3d5ec77dbe7. 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/SE6XX2262974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27d8bc122fda9c8aea39cc584b293e9a1572a5f9eb28ac158c0028189fc7feb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/SE6XX2262976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2064a0235a9bd996156bc93d44f994bc1b0f1f8e2362063c38f6f4dc383af7. 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/SE6XX2262975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b8b9c8aa5fbf6fb184a290e999756773ef3f4ca4af63ffc35ba84666045bdd. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/SE5752331695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fb1143f9e97162f0f0530684b785da116a1c4540201937e0870f3b27f8e86b. 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/SE5752331697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74cf0c30ee5ee582eda305616675d32df751b6ed25614bc0ad6a166e242ebeb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE6QE2324805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150afcaa8e6440827e1ae0350fc044a70f4800c0b1ee795b31cd237ebf09d6d8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE6TI2313872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b76818152477398154907f0d6a9c85a814aed0c0750961bf8e13f187062b73. 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/SE6SA2342402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a682d1950611f8d7fa3564b8be2c3569d337c7b6d89522028acb3943f288db1. 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/SE5BU2411648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633e0b7247aa730157f30a54b6bae1237ef93a9f7eab11beff5434f22e62317e. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/SE5BU2411647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8118567f64a13374a622412af3245275679bd37c27d819a918af54dc52995bad. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/SE5BU2411625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656e9322da75025e7e5b3511820b18a712121f9ecebae030c9e1e318f52989cd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE5BU2497344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1780b44f6a812aa2107b5eafc699fb009da458f94aa7a6d20b1c09551173ca. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/SE6I32437039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c75eca75105ec2e25488484f75e7f5c78a6c10325bdbe2151c5d25c7d60f32. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SE6QE2496249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260708f5f72c989c2f5a26e2e29a84b6dd4eadb7311b4bf5b568160e2820bd0e. 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/SE6XX2532628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9532a8376028bbf6f3ffc0e22dcbf4ffe1025bd8c11ef9e7c988c6793c4ca2f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE6XX2532643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d76ef25316156995ecd3256d383f88f6de4b7664c8fbc1ba703883104ec196a. 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/SE6SA2504041.