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 0x4ae7f6489e0d05918211c79cb851cc3ac334ea3cad243781a80718b6ff0c86a5. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08f89b11-ef8f-42e0-8cc0-298d5f00f603.json and https://artists.proofprofile.net/proofs/artist/08f89b11-ef8f-42e0-8cc0-298d5f00f603.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 0x3faf3af2c4342623689d6410fb2616426ff67580586b24aa43a067c21fed426d. 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/JPB622202840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47da9c58a95f27b89b7f3e52f6d516d5d348ac5d882368f28cb2d6d2795ad1a3. 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/JPB622202841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b033eb3aa55660078199358f07d0cb5c01ba70d5ae61f04f4993d2467b9254c. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/JPB622202842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe30f03410dce802d4d967132bdd473b1b054be814eae79f46443a50301f403b. 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/JPB622202844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab9f44983adff90293771db6146487d55bf2a6e03471f3979876af14cedccc8. 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/JPB622202845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb454085fa0e21e0b0f6970132999600e15397380c200f967f2ece8944fa043a. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/JPB622202839.
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 0x345b5d307e5a46211537f3dead5c68e7d75b829304b326db223bc60507121a7c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPB622202843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382741715d63a1257e6e3af17417a2bf0c74ea8f6d0a401e81fa0704c9a5551b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPB622202846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a099c48ff4955d721bd8b232772b175f6f14d449953fa425adbf948ba4e2ce. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPB622202847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0360f524e94c5559d4e69385f8f5e7658717e2139844d728fac78bd8e8ad466a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JPB622202848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaf05a6d3f433a6064d5c1b5ede48fc13b95fce481edd8f1f30dcd84ae309c3. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/DGA0L2460362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac4fc64d0163daaac24109bc412d44ce1b24a2a39bffe38c0dde2e4c5e8098. 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/DGA082481059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7857577299abc265c27b8406895574217f8230d68a6844248e48d51a93edb8c0. 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/DGA0L2460367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465e9791599c5fe32f42227ab76a6b454e19a5b4c7c038418fa78ab2044e1539. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DGA082481058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c86a0a6e0ea2a4228cacd43150281c66cb8c045db1c6886563ebc6305c23fb1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DGA0L2460363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc62e14b3f2acb4eb5e630b2fc73ccd33d832f6d2a356a530728e6e6283c26c1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DGA0L2460364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ff86b1e6ae352863bab027e338c588257b1ecc27426b7e09339e96350cbb08. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DGA0L2460365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf39aadfdcb0512b469551ab9390f7b0292da46063dad05491f6e09aa0d4bf12. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DGA0L2460366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6e9f7ef353ad8064c6d9c87c09bfb662cd1b872840898ba140e4f37bcc998f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DGA0L2460368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b503cad98658ee96386b6dafca8e9b2584c23a59bacd74626a91a5ec09366d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DGA0L2460369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b087b02a8a0bcec8f16ed1049a003012aeb378e3d3b1e05b58d94ccc2c2fac. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DGA0L2460370.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec87fa8dbb9be80416f389a52dc26ee933c90251412aeb66ddeb9dd6bb3b70f0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPZ921612078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a1d5af5ecd01c633db00ae81f351ded3ea084ee68398cffd6757c21cc50b7d. 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/JPZ921509483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8f46c3825522a128fdb276d25017a8e60909b0dae9880ef76fdc3816586e60. 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/JPZ921509484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a339d296fefb7acf6346c20e9f856e066b494833cdd40963b3663b4a07b1212. 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/JPZ921509488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0098fcad06e36393b5b848f02fe3ab3964b8ccbde7c42770c98f179d7006f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPZ921509492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf061eef3ee7f779a33e7b002f1f86e09245ce1e95afa6f391d70d89adbb54650. 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/JPZ921509493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89338c1351158ab5cd2fda2096ad69bf24f72c4416c28b2d41a344c50e46c5bd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPZ921509486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb7f0bf37255ad3e32dcf3928c33143f09d14b25279207ad767da4485b8cea8. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/JPZ921509487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe463155ee9ccd4f827da6432f6e87aa06f028bac74f21a4c05eb5b2bf2b327b2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPZ921509489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bce6ab5ba5aaf46a313773672df7fcfa4952dc0666dc138a0b3404266ac31e5. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/JPZ921509490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc989974783627062da4297e6bb2ff53fc6a9a5524d497ee878ea0e7d73651a71. 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/JPZ921509491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8fae2f1f3f62bf6776a8b1ffacfe2f433c164d48f8d58bac3c71f52bbdb059. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPZ921509494.