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 0x70dd71a49a83c24a96d94f3156678e3b4a076b2967d5d5099489fb5667036907. 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/876b531d-a52c-4ce7-9965-fddf7b7f4612.json and https://artists.proofprofile.net/proofs/artist/876b531d-a52c-4ce7-9965-fddf7b7f4612.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 0xaac32b91333ce9885f18a99ae7a22f7b91c9386e594671bb80f8f5e7c36bbf3e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHN52379993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d44e9436b4e7372bcc6ec4b5579d0ff37d2dc4dc99cec8bb4d2d1994302ff36. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDA72479800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8633a10ce8f8c5cfab06297b1d8ca3692833cafc45efff6f8062b3657d538248. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6L2450409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2a4146c2c72efc5f34c4b26a009e80910af784c0128b150e81f0fe56c58444. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAX2420763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd21db91829b69aa1e684f13cd3467f5580840a440c5b797ff66b2f367f97c52. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTBF2453064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1aed12cc6651a799298fd77ef7b11b28276b2a510e2eaba6a44b530c121df6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:09:23Z), 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/QZWFJ2442059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d7bf5601bd910c8850a02a6312410e7c71f9bb3255578928066200bb93d745. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:49:26Z), 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/USLD91770877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3a67ff2b49e3750fe4ea09cb589a000d1e3fabade33dd06b247a79cda8fa03. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USLD91771990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b3793125d62602c678b687e935c67bb2ae6507deac38935083e32a4a1b466a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:04Z), 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/USLD91771991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c9df0450f9d58a2ca4887db36aa0064480137dfb74552b4936f3820f7ada57. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:44:52Z), 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/USLD91771992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b71ae40d94509fe201a78e4d7843d5eef53429a0032c84d26847687ecea30b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USLD91771993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a7c4b3e58ba77725bec07071309dc9415728b4591d3f6db19a014bd562aa0c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USLD91771994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d369c316462ff1533522e223651d360701a90a387cb4ac034360f196bed5a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:28Z), 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/USLD91771995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c6f3e124a0ed3dcd39e63abc202f56d4e4c858102772a71c4f2b5a41f8be8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USLD91771996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac77932f008501b2f1a7108ddb942623efa04eca7c6ad74f7e1d277c0223d09f. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USLD91771997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e9ac0c9c6daf0173f32cc46a68645484d60ae28f2f417ae8deb92b51dbda4b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USLD91771999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2ca76bf44b30507e47cb542ce5c18a46cb92cf243e1567debaa686a3ce9c30. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USLD91772000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c1d9ce1890c3d66d02364aaf955091f6d0cfc012502eb154e7f2fa3996497b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:17:00Z), 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/USLD91773961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba77aa79fd86a80cb6a24f277ab897c8c7ec9557503deadbedc581878d9c20e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:08Z), 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/USLD91774504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876b4e98611b5837c4826cf48eb735615cbc3ae01fa647d71d750e1978c104b5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91774582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874adb3d236e48136ab3bfe1866bf3a32f8cbd439ed7e78d8833f9322358e362. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USLD91780977.