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 0x4a21254adc11c081494bea703e6f5820521f1f8278d8952232693987610bc025. 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/4ef376a8-f490-4e44-8de0-5651a2536243.json and https://artists.proofprofile.net/proofs/artist/4ef376a8-f490-4e44-8de0-5651a2536243.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 0x666778344536fda709c9e69f759127848e422ffec5096f093a933c51b104b087. 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/QZPLR2327055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3683038a5549cd7969820add719f02b8448511ff7a79236740d7f5d7494143. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAU2366297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ef021962dded85c5ebd40d4fdb35a5744dc41f075811cab26cf75e954d432. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTAU2366298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239f589685c6b8b370a6611597666c991fe290efe8d2ee96962d55992c46d890. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB52318521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c846b2948614a0e55dfb05621c10ca73ac4963633a038863d9fcbc14cc60426. 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/QZTB52318523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56c7e4e8013dfa7555b688123410028a7057ff99ca747cb73613c56d0abdfd1. 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/QZTB52318524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a513fa5516a75e7905a3256586d7550e5d593341e72e7e6190122eea2871aa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB52318526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6497975779d891b54c2ea92892b65ed3d5dd40eec0002cf74865a61fd6b26c1. 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/QZTB52318527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd559249e9723f223f60b0c5afb985dcb7d3bcdcea2eb69e383848fc82224cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB52318528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef7a1bce571e80cff4559abbe55cb2bae44574cc4905a18d54be742773249d7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB52318530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aab2c218f0016a660754a58e000523b6b57793e7c4e7ff61a2b3291e1b2e50. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/QZTB52318531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7578f68111dd3d590afbc1cf4e7c4169cf470e38630d60e1f41db50a4a9f44d6. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZTBC2345497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10c3fecd884b40c59751781cb334a9c99f135bf212898d0918b3c8e7528eb72. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZTBC2345498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbac3bc12d864760d2dc23bff442d5ea2760ca784df7a7b02eecbdd5b5f23277. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFF2354039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbc16f1ce6ee73c10de9c5ab316eea2fd6db85564087498bc3f228d45ffd706. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFQ2339627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e84ba64fd2525db5e033cc279f9cf79922d86d4d02244b8297f21dd634335bf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFQ2339628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772d32e0c01cbed034f59be1b33a4832f6f8cded46728920d0046dea4eb02091. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFQ2339630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0fbeafbc563fd66353596ff8022ae9466b7a2816d2c472e6b818feda4ce572. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZWFF2370711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e527477b98f5a3f376b9cabbab646c9c5c8672a45f45f1e8a74a3d7542eda78. 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/QZWFQ2339632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5103e284d4e256188b793dbe4d1a0a7ae1f960b23b0919a3c5f3d94b42ff8dda. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZFZ32412232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb12030dbac4e4ab63d4a81a83d20a64e0a1dca4709aa6f5cb71b0c64ab672c1. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/QZES72474075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f8cfcad1f549875880203143323c2646f547dc0cb3659ab4c6ed526c1bfa58. 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/QZHN32416547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7309ca61c01dd387e5b9f8c55ed15ca6fda262836c35e131e1e4ffb7331834. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN32416544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96b018da51e7e55b94990ff1aeb7a8b955585fedd13c84099dd97bf20edfeca. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:42:00Z), 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/GX3Q92413028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32da493979c1603e5e8e25d0b57e5139fbfa2f4a4331ccea694febf58409927. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAT2443629.