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 0xd9f9e3d735271e80eef4d43d6607ba903ceccd7f7480b629f152b3d386c19697. 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/b354118f-c8e7-40fe-9788-6e8a1da30ac5.json and https://artists.proofprofile.net/proofs/artist/b354118f-c8e7-40fe-9788-6e8a1da30ac5.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 0x79ddbdcc16ba81e6f117e5f4185fb11c7447acd23817c3b0f60c230bffe861bc. 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/UYB282311002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32f47f0bb7434e163f64f190e4c2bd6af803ea0382fab768a575b62a100d92b. 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/USANG2202091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5d23950b1ae0d3c8477e2c6fc35fed1d412e4f1e7e8390ecf195f905dee5e8. 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/USANG2243483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a50f33ed87f8f29c07cb5bb47d8a4c574a0515a46e3ce01aa9395c3488c66e. 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/USANG2243480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ca19e430524a790204e690e819028d7a79b4e35621b6776df3e2676a7ce7d. 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/USANG2203797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ea8e7c28f708de7142080d88802eea7395756354fd1d801589550997521902. 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/USANG2243485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd45967069132eb1b14afbaf8892c4e766681885d8d4794b1f73fe7f3895401. 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/QM3DF2147960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96af6cfcfa8efa8569fdd03a3a37e9bacd4f737c0b2168259f606d62b85e73e. 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/QM3DF2147962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d30d116c0ef087b883762c668e954a5243f457528d7e684d580a3e11441a5bb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2147964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b9b8ecb87bc1c47b86a781ee981c60642f0337c7753b99653baff9477998ef. 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/USANG2108730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b375412802c7e8326974b8b9fdba9004be66874819812e76af428eb983fbc8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USANG2108737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f01931a554849c933bdafa99cab9d0ccd859eadfff42fe2dacff362a9dffff. 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/USANG2108747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f076d7b1ea7de8579a1a86e7dbdee2ab74d039cf60874d09e8d0ae976b88e1. 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/USANG2108751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84f87ea85ac38cbdae9fa51747e96a8d138aa5f4ec9439d290e1835b37fd365. 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/USANG2108752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a1d6f962002c2f71ecce6f5bffb03b56ea5688936a7d49cb8bad9837893aae. 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/USANG2108754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c193e8f4f17734000ed4eeb79e44aec6d2219365917e531732221ee26d90e. 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/USANG2108757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c069f294b7e6627e6c6ab8516f8a1870dd7baac8da1dffdd5783f4e9be0b9f1. 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/USANG2108766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf04d988cf056fcf83ab508e4a7c3f4f7fe2e1eea37ceeb8ae8a6a23b64b2dc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEQ022005251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9977c29be3e99b6f962237d1be5bc343056a3118ba6971eca9fccbca33b9e31c. 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/DEQ022005252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db72941029924e6337d9e194200fb43e8a7bef47fc79823c2c7c4b986fd0756. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ022005253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c01457b4ffc29bb43969f820a931a78a52fac68112b295373e95bb1f44936. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DEQ022005254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca35cacdaace6dc8baea746a9950e11898ca7edcb256b18e3ddcc76086b0e470. 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/DEQ022005257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0461e47273535051b10ca6f97a41f3f92ae5c592931bae3c161601a4a242780. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DEQ022005256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe672dc01d218213b376b0023baf5d6164a6c0ada31b78ed757be14f509e82b4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGLS2307847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29b5d2a78729aee8f4d380438d7e36f036871ea0cb1651964894c8c65d7c903. 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/QZTB82238494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2fc2dc82ee50ae17f46c67a36241c5126bf07d6c48dbb44375d967e0f2a8de. 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/GBRKQ2115303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5ee003913012f87588e44f506f0a774abd9b267fbd72c9adf1a8d56e70276b. 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/QZNJY2277822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e46d525e14242de0fdde975dacea1bf8f2ef470f1e8b950aebd683bfdb95441. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZNJY2277821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd980b84ca1e2def1c44cb70a7c74d47e4757f1548cc6aa078b5644a78f02976d. 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/USLZJ2278620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd084ed97d76cf570330a7d452214bb1a52ecc347c0318eb8b4f0fae2685c7ece. 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/QM3DF2122345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b07eac18d4e7258fea35966f476100eaeaa7f67b17db406e4f486ea5fada2cc. 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/QM3DF2122348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a2475c620e2ed3b45458a01c5c7b5fea155f1aed72b4dd7b687276651bfb42. 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/USLZJ2433495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9082bc7dba19aea4e01f8759bb88694025955186ab3aca805a8cb8779eb1735. 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/QZWDD2531543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc104b369591adb38ab18aeba0d1875b766353cc7d7844f7ecda2784e8687e761. 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/QZWDD2531554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94737513bbc5570b4685cc07a8f50ba320e39d0ed20a92fffdd563b0a6e3cd5. 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/QZWDD2531557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf840391d78edbcb1f2fe5671215ec939d18305313b796a393f57f9d10ac829e5. 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/QZTV32534361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f1c3f0373711248e385e173b67de584c95a05ec7fbb309a2759821d937d2ca. 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/QZZEC2473841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ddbdcc16ba81e6f117e5f4185fb11c7447acd23817c3b0f60c230bffe861bc. 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/UYB282311002.