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 0x216d669a97f6f05d5ef9e4264ae281a63f63805f18b852e9734782ba0c66693b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1038735d-865d-4f63-aacb-400162d409b1.json and https://artists.proofprofile.net/proofs/artist/1038735d-865d-4f63-aacb-400162d409b1.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 0x45d2fb483152a027b4140e1a34a794a86f136a623a8639261b910f2fce063199. 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/QZES52371002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c77c9a0b5fb048feaa8b7330d11e94e894005ef047d840c8d08bfdc9984b05a. 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/QZTB62402469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3899bc9d57cd0c6b13c57d92856d9a3e1f4e6366fc3436cf869de4e59ffd3fce. 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/QZNWV2451544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f388f2d2bc5c25b35a98b5c6b936842652125144f4cd5274d9b965a3fe270e. 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/QZMEQ2459707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d837ac08e8c6732a03aedaf503f9fa10d124e5e6dc3ad3dbc522275c666a1b3. 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/UKZGC2402276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa834b217116ab8c30574d7cf0d62e770c383dd4b5f1c0774b3414bbfbc70357. 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/QZFZ62472214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa368c5b7ce5479d329a3b0e3b2a7d15c982f2a00107e4e0a1dab74d2cdc5188e. 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/QZFZ62472215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6291ff6582cc8c4b1420c15920522c62b299018d571854978dd3ca098192695f. 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/QZFZ62472216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493cc54c788306a39cff3bb6a01ed77ba602b8b2acfa4d4f4c957a98436b47dc. 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/QZS632283421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e97a65ded01b5b0c838b21193c50e1ef5554910fb01c482e1640e856f587f1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB62307530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169133097e72db85dcc42dca6789b838d32e348671eab13b52697c3353a40dd4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTBA2395743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5fa3cf4827aa1b18ce81022483f5135c251aa0136c3f5adb727c2b73fa7b44. 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/QZMHM2389241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9ce279ec573fa4230fdad8381f17a61bca60468fa628340ad4d41a51b559c0. 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/QZNWT2316642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4811b570c3901cc7db7b86bf867f3dbb8ebf3e5dcd53584b45f1ba1637b9519c. 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/QZHN42373128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c2d364040ec04b871a45ec9a0d816ffeed46c530df293913329645b9244d03. 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/QZHN62334071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49695bfe33c9667adc999c577fab2839d40d14b6b86690c2c260eb5883a7f38. 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/QZHNC2353018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d1f77789e20c42ca2468852c2f715e8827c42d3f54d30f57d7f1aa5172ac18. 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/QZMHM2345419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270a93a604c5d014f08fca48c4886310537f911f894113cef51f6f588e1692e0. 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/QZHN42367123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5f57620989bad0d118d47a87850b16bea26623fdeea40e060cc5fac86fd010. 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/QZDA52312823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130b872c8a532687255c97cedd5fabf970a82000c2c3c9892968238deeb6529. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:52:58Z), 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/SE6QE2291201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779e1412fd8c4932a2abf4c55aaf68f327e8ee53c681ba4aa87829d9157f3840. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZMEN2271400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc6b080cee4515e1a6876d4a52357511ae3470d8656de0cd090f5ed06ab557. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA2208303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131707780e89781a69985930774d923d714d61280734fe8d6a4fde7a62b6fc99. 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/QZFYZ2235252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e981866b352023279cec37e52333de47f60f1da68dd9cf8065febd925af932. 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/QZMEN2598393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2aa5af6eb723b545456adfd17cd0df087767fbd660ce48a4e0ad71843d90f6. 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/QZK6K2568051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff907f19557ef898c2d178ef87fd0d920166712b7b26666f05dc410a9d84cb4e. 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/QZK6Q2591468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9783d7c3ece204880368902c017e2b43a8b16428a2ec5fe4fa2f4dc7a1b05240. 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/QZHN82537495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8d6a2bb27a529601a2e6546f85144422bbde26dd8bf473951ac850cc28721a. 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/QZHN82537496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d6b75d6081f06e9d3545d9abd5d8f8b6556446d636874379c1ab124601e65e. 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/QZHN82537497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6455582c166cd935ecbe807c04e781830927a74f240ee081f22837ce997592c2. 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/QZDA42265614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e94ee06aaf6c112177e0a5cbf73aa2f9630a9f1f39fe4f4b7a373a1d3d6d71. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ22253507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130b872c8a532687255c97cedd5fabf970a82000c2c3c9892968238deeb6529. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6QE2291201.