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 0xe0edae1c9ced667ce9de33f85ef5a79d14dfbc426a9f60ac50e7b3c2aeae0dfb. 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/3c1eced3-accd-41f7-92c7-c80ed141dabf.json and https://artists.proofprofile.net/proofs/artist/3c1eced3-accd-41f7-92c7-c80ed141dabf.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 0xeb35d55697f2d8069e9099877ff62b6527f7f9bd84a6af1fc11f218e6c85cc90. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKXN22254278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fb440ad2d8819f06720194e30ed1bab52d742aa9442c566ac71ff3b7af1180. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2132895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb904d73e36546b57d9b2ac746f0aab200c419860e8a6eadae6b9d0f4a95e8bef. 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/GBLFP2386362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d371871f3ed7fba85a8f31afc9fc3e8d3d50a7df114505f361dfe4eedba615. 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/GBLFP2386365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5a8488cfed5f85c7764f5a061fd4dfd7f70337cbb1492b10f3e03797f34c11. 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/GBLFP2325013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efb25c7fc54cd2d3e7894354917428070d3b13ba52644f13cbc130edcd57e36. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLFP2386361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b61ab22aa6c3a88a688f712e1d8fb79c793ec1c8e046375b62f2f6fa0e9df88. 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/GBLFP2386366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382d7220d047bb749e97611ba9b536bed5592d4b774f47be4bdf152fee38e7b7. 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/GBLFP2386363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c01bbaa85a9d13d9e6d59e88c064a80b95633bbd62bc99920d11e5a6a8fa80f. 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/GBLFP2386364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa46e26c353c3166725b2311072c4f5183c8e3adaf75f0c004a1e09ebd6c68. 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/GBMA22311960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5a8488cfed5f85c7764f5a061fd4dfd7f70337cbb1492b10f3e03797f34c11. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLFP2325013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18a57c08221dfcc2cc4ab9a53b69982fc39baa81252e56f2311e75985e03d79. 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/QZW9M2252038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7759bf54af6d8082aeb89600030f6714ae9ff7618a93876884149be16113b6. 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/QZW9L2209508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0228f9abd10e374fa3937e7e971d0e12241cd1ac348b768c42250a43682bec3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2264570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bab641e093b86445c18ab36c0cf5381e9c437363b91f9f3701b763d7e021cf9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2264571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bd5cd5d28a35e2afb31062129f0f2b69c253de9ba157edf19f7b24fd7d82fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2264572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665029fb8b0b470d3e991a18fa6d1672ee70f96168856cc158aee2b271dc2d05. 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/QZNJY2264573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be113ad9da6b6ceeed98e083f68619645cf6ed0189aaa2b1ef1767f0c917e4. 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/QZNJY2264574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093363ed2b5ab32418745dd445a5a818665d432e16f827516ad9a8c577399133. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2264575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a022766dd5281e7980203c1457100c6f68dd11e71729e7f82956ca3cab9aa7. 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/QZHNC2297639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4b38b3df965d7e600409caa569f09ac250de4431a95475d6b3008533c7b9cf. 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/QZHZ32208696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a728f84c0c4f2ea075633090d5933277c7c2d0f1ccffc9d08592d9a4e658ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG2273228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1246703aa04fbad4624d21c88509a8576c1ea08fe2571912ee4a6145ec4b61b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTVM2100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0124b0f40d2088341832b22697a22025fa4d6865ae1358d0a41a2bc14f9504d6. 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/QZNJV2133430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebd9fe6fa2185d87e8262f7795266dcfb629c5b4289984ad48b8724ab36dd69. 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/US7VG2168284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dbd4585cca39e3536fedd12cc9607fda6c29421020362d18a356ade62f9df0. 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/QZNJY2025535.