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 0xabef407a45dc63ff54d9689b1c40d0bfbe1a8db67b3dc6445f71cf02d0d34da5. 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/bba6d716-830c-40d8-8ca7-7fabf0899683.json and https://artists.proofprofile.net/proofs/artist/bba6d716-830c-40d8-8ca7-7fabf0899683.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 0x858701aa5a98b9b7d8de12a3bafde8a4df4e49309301f08462fc62660dd6fc23. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNFJ2307354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e77b4dc0195c5932f126044d0ba812d03234a6691a765f9529ce09caabfa95. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNFJ2307357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01f854a75a51193cb14b51114015a9ef5c35e354819d933011325b8b200bed3. 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/QZNFJ2307355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ce8fe00bc201ce4b350121bf5eaedc59fd2fb291e523389028ac5714e49baa. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNFJ2307326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f7d368015e9e065737d1d39f737fe5031a6242ef781e5db3c6d6a8362731fb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNFJ2307327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd7c445e2023a48ec7a0eb3258d5416568cdb76e233cd638c996a5f6de3e0d2. 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/QZNFJ2307328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca764c34dbbad7dadeb65c574aee04d79c8b1dc98203f4cdf5d834e5f746d35. 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/QZNFJ2307329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0c116f740ad86e70f4ccc7d226116a8bea1d07acbf880aa83026a593a3d5b9. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZNFJ2307330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a637adc0bc5024c3699990170fd6c95573005bdcac974fdec16cacd83bafe6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNFJ2307331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0006e697ce253df1b3ae62b5663cebfa8ae48a3256ee4912585318dd4a15ae6c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNFJ2307332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723cf879fc520f7102b7d7ec895f4be4df681967288e7a1195818c7aae267ad8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNFJ2307333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e848f01192820fe47da759f152fd6428d17281c7f4c6226be015e08bc59f21. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNFJ2307334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b16ed141034fad99244d304891cb9ee331a67895c6cf92f5689450cbf5cb3f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNFJ2307335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eda28ced27685e1bd35ef1b93e998c0b6f0041fb55fef261b696c75a029148. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNFJ2307336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951fcc6313a0426bf2aa08d46b59ac7cb335976d4997cecdf5ae4a0cd66b1cf9. 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/QZNFJ2307337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4616ca4c3ebdd35d9b99b2d553d48a72dfd1160962b21dcc3c8c5a0571e056. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNFJ2307338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe515b1f20a6a5dee9c2906be06a867e307fad09c037d69a9ffb1c447515090db. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNFJ2307339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c03717f87fd09d293756b487af3fe7609d5e1fd780e11ec3e344af9e265ae01. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNFJ2307340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd0d3a47a79df59e65d73c43ea17328161c9f4521b1ace95fbfc1d52c280f0e. 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/QZNFJ2307356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852dcbc3fe47dbe3b439c0ce56700cd96ae45d7d6b5a12b042d58b91c7f9ec6a. 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/QZNFJ2307358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbaf731fc35ce9506a76964c45a479b09606e6264e7e02116dd3a386ee8c537. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZNFJ2307312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74d2a094c32e103f19cde5ddb524c9bfa008d64437f5a547b8f092f185dbed4. 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/QZNFJ2307313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed7fd57bfdc1b424fd20cbeabebfc71a2089470b60c85715e86a4bfa23a6fd0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNFJ2307314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dc53be75e195e262acf3a73691dfc0fbfb26d87f3bae6781bc74fd21b13c7b. 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/QZNFJ2307315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea83cb522f972c60a72c86a104f1e703a384b3921019aa3d1b7d35039d6452ff. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNFJ2307316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f69f6e4eab3521b3f25d15af606444e37c2da4f9cddae2675747e22dbb1038a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNFJ2307317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893448f983faaed77f7b821fcc4391ab4fb43d3ee141b0e84902e37c49a130f4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNFJ2307318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3e6afc7a540100a616fbeef5806f6336bb26db7ebd4fb66b48f0d49f270a8f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNFJ2307319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d6b3f3d2aa37a00963e8faf586b85d1e4e3e59aadc9aa12faa3171584e0c8f. 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/QZNFJ2307320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe886fe9b73c3435b977a8e4d8a0310084510fe82b1f13c1403c36a9cd93408cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNFJ2307321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20279ab16108af9dac1ddade5531f9e13cdae848241020f8ac888d1e95c72c25. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZNFJ2307322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf15c2a14c1351efe5f76a9800195ef2f536336f50c0e0a3edf8bb1fb75dbaef. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNFJ2307323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b4b5189b43941d7bbc266c1b9c0fab4fd6810475b9214f2d69ef5be9664e74. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNFJ2307324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a6542305553ee25e31f02ae76f846a28fa7287b5fc6bb476bba27d30e5609. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNFJ2307359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128189160d8d3043eea0dfe81b7da75522e1eae845622f0c9e37d6917cf0fa5e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNFJ2307360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599b289d25bf22d4bbcd4234ff9ebdd1f43dfa1448a6aa8b26aef871310dd798. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNFJ2307361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb014e4042f8ba2b0488ed5362b00b93707ee94ccd3843cb9ff3cb8bcaeb4906. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNFJ2307362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a0b4d840e3996e465b7ba01ea6537ad755462640a2eeb698950fbccd8d58a3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNFJ2307363.