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 0x3988fa5e5a4c70d9319a72b0dd1afe9676566ed89a63833c781c41591a762c6d. 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/328dcda9-f24b-4380-8551-6faf57066c51.json and https://artists.proofprofile.net/proofs/artist/328dcda9-f24b-4380-8551-6faf57066c51.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 0x0374dbafa9659c98a71b460dfa82fee8b7c656d328c303a238af317b36aa5e43. 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/NZPB12301312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4183fa2970c86b794a1a012a9c13b97bc27447d1944cacff1491b4905844c05. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NZPB12301389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836e6b65a5d583aaccb46cb78e434fda4a21a83e2b4398bf000783e4181f6b8b. 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/NZPB12201108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3564dbd1329c9c3979100f28d785499a4fe0cab592c26a30fd40d898b7e32e. 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/NZAM01600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e93734ba1b22130df30d089c0eda2d0848772ab880eb6796ece842c49c086a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH1550625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13e4ad6eba5e745960aa58e5a083248d1b159526a21e6e516c9ba6f9e8af0b4. 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/NZPB12300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb054a2f79c6ff8c36568fd53abec4adfad2beec6f5cc18cb27a3715a3eb8b3. 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/NZPB12300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4af58b6b389f434b3d9b731d1b9f3be28ff38969124fbb019805e9cd5d62c77. 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/NZPB12300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa930326d87807cbe8a03d88bd7a034389fe0ac5b744ae4acb4f24f35730bc5dc. 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/NZPB12300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2634faaf2bf631ab14e66908ea23614254645c640f77a274a9e5f9211b521ba4. 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/NZPB12300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcddf5016b443b6ccc94d0c604087642387203172e20e1cdcb7c02c6f43f430. 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/NZPB12300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe406df21c274a3bffbe03a8cd065ef7fdc35f26bf2aea1e2d7074b05e929f539. 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/NZPB12300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922db1cd2aaa3db85fc48893a6fe891591eb9a737f5dbf842b9fc401f20e8111. 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/NZPB12300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a678db3fcc15e61e22a3ceb8406dbc813611d655f2f13c9c0fb6bce9bafd40. 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/NZPB12300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8efd2de26003f989d66645664070c1a4930f70d6482a2a6c3f03c051614691a. 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/NZPB12300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28de08a2c987c2ecf749e2d1a5254c38b9b4c135a92d9bf74bdb20ded2843cc. 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/NZPB12300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2c1fd55a2fb48f5522f4e232ff1c6b48a9a150449b9bee8f5f6a691f23af0c. 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/NZPB12300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f8010f3a76f93f74090a3233b99fad0ab187e11b6b68e83de784a20de9c41. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZPLS2189894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e76aa12b62f842d6961b07258c5bb0419bbe061fc517fe01b342ee5bed295f6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZPLS2189895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48786a1fbe9197cd8822ad073717d0efe513c0ce9b40f40c1e6faadbfb133372. 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/QZPLS2189896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce3ec187ad330706e85e774e20f06d011260821a75c408b90b20373b4fbc5ba. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZPLS2189897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575726e30cd4a3525e31c1480cc4d5905f7f75dfc6c08616d3c3333092f19cc2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZPLS2189899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2c77804ea84daf7cfcffa313f6ce60c74acf702b455dd6f70049828561656e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZPLS2189900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a87cd12293daf8085fca5d900e900ab6e01a3cbb6838361e5d261c5071974. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZPLS2189901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8308b31cfec447150f4997a79293a5ffe59a3c4470b2edd3265aca03371b1df. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPLS2189902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0014e260b7f238608128544fc0b34cd1418a0711cf5b861f7203f0b27a1b8d. 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/NZAM02102774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1317c8e7b4d9d72236e6f4a3f0b225130e2dc3a70eb969bf816cce7036efdcae. 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/NZAM01900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34479ad7688c23299a0b2ec07363591c5245fd58cdb014a086e8f96ddaa7b6be. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCACO1611954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f1d7e2d66e75b831208197e6739818d29c39b6a7d2bf4d71b7d4020680c14f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCACQ1625384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dec137453f953a665548a89ce5e8713321b2a6dda12ec420afb8419d29658db. 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/TCACQ1625385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cb157cc88baccb6bcb972ee47fa137c321f74d4a9111276603ed5ec234849c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCADK1755929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ce1e2a881b9e56eb5fd9804a3bd1dcc8e0140ae4d1030dc32a196c95cd38fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCADK1755931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f61d089efc878b8dcca5d6702cd3b6cb27190dbcaf2136359ca564aea7829a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCADK1755932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ce1ecf060f77c99145bcf0a8e9435fd43636fdc6a93743966e49881b862f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCADK1755933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91633563cce4aced4680fd820ad2390a918792f3702a5e338a35b0066c6b28e3. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCADK1755934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e636428da63ebf307d81c307783aef4902b2b156cca249c938f94db9af55bbd. 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/NZAM01901311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36646b2e85abdd0f6b89c0feb80e17d2e330987bfd3aaf706c5e4a456748645. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCACJ1509727.