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 0xaf5799df0317e20e0f561cdde562598d18a71ce0a0b8bb9849d7ab3b5a0dc1c4. 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/382a6d4c-a3a9-4adb-8e40-dda8155f83a1.json and https://artists.proofprofile.net/proofs/artist/382a6d4c-a3a9-4adb-8e40-dda8155f83a1.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 0xdebc141458fe9e707c2e30cc467801de1f841298b29f1789a1e8bba413731f22. 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/US7VG2332804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a63b2ad2f3fb8462347c7e8e7c94f52a4e1ff0f27a22fa156a54c9b1f870b7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/US7VG2492560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c8c17be1d243cc5a976a1f8c01227662fd22488b39434852d86ffdb5ad4fce. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BKOUP2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84bdb973f52783686811df40e1dc33e9f4a992c6f169f866d179ed9134bd7e9. 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/BKOUP2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e8731a4bd61d58d16cdc1b0555ae52c3d8b3bef67ff48cd30c1e11dc046d03. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ESA112432261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d22d2e503780d9266526a3357b142d4f401cf139ecddeaa8b81aa6c4578aa4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BKOUP2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2773f1079fed273e5ac6f225e3c7c52ba5eead664b5c1e448c1886ee6717c560. 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/BKOUP2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6707834bf1c353e93c75f6c34db7b4e9a7fd20d93bba473f920dc2ef62c4811c. 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/BXIV82439440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216e001a948e3abbdb48ce727d1dd46ee97841d883d656001d4d3abe32ed8df8. 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/BKOUP2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb9b5af66b9dbe7ecf92a22bd88e532d9eac6da26f8da7c38392e0893186d77. 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/BKOUP2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28231b114cc965d13072ccaf36687e0ef5eefb22a1246adf661754c4a280e2d. 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/BKOUP2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8dbf65be060788c129aa4f426fa64d0c062080d5ed97b630f51b9e7f09859c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXWCR2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2d07c349b33790e96ab46e45290462c474bfffcba3abaa23b00b7da1e537f6. 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/BKOUP2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c335c1e88b8fdb6bb8b6e9e4257bef72424817cccdbbff8531257ce02010cda. 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/BKOUP2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf393ede7ad3e2881d33b284a48bdb60caaa1f7b9070d6cb15ad8868b6c9513d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXG212400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f52e42b98a64a42cbaa2ba08969b0a365a9da261c6d83a3c502d7febdf7357. 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/BKOUP2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f69397adfcc3920085311038270171e1f8e78f0ae704b28419b90f2af36197. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BXIV82430537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2704d0a1d04fe62b4bcaffcfe9895025fbd960900c0469940d84619ebacb4b02. 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/BKOUP2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9b31774441c0db935bd038da2ce6c53c62b4bdac00ab7822cf8fe903e0810b. 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/QZNJW2479541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d12c16f76209c7c4035dbaf796abf14642e69bc025b0490adf9c4858822b1a4. 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/GXD7G2448212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7357ae991c6c9f0356a32e1457f9933b787f924aca94b8c6eacf2c1298dc8c1c. 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/QM6MZ2405932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e3b93d857ee32ab2f948c568b269cc62f0fe4184b5cff26a63b55d8dc6f29. 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/BCQKE2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500dde22efa5fdb3ef350d79e9643336f2475385054431770098043e5f2875aa. 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/BX4IU2406683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4ab526166f4dd9aaee5f409bf23f63bd05c901734f80ecf6a717ed2f180061. 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/US7VG2456354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322e956aae2c00409cddb33b8cd8271db5acf2692068bf92289f154c7c64a1c7. 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/BCHFD2400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd060e7de76d975bcb191df0d5fb7261c5069d7195b26e2f0c86c21e93a8c9106. 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/QZNJY2259531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43326fb1e8bb023b68292556060508a0bc066fcf1f97f2ceebe7223b8933cfc1. 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/US7VG2370321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba07a0549e80340995b1d523d795bc7215a6d5a6d24d110376ac4f37b09d036. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ5AB2315637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c130a15c08ba771e469754a47e29cbbc24436c59b6df92d5ca94a3d944725ec. 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/ESA112318722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3981ce748fb906462b18b644a11b9ec1435ca099acc0fd28d744ede0eac93. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZGLS2326378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcdfbaa8fd682488abe86804793244f3de61dd3ed02c883b7906c291b399821. 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/QZGLS2319384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed09e10b3bdd68b1bcb6f8309736c3f86e5d2f5aeab469f585c9f35ed261e57. 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/QZW9L2353343.