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 0xe55b2df06a80302a42b2456e82c014f85a24cd75dd6be1d95ea857049fc1e5e5. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1467c38-9c45-45e4-8271-65e0f7a27e1f.json and https://artists.proofprofile.net/proofs/artist/c1467c38-9c45-45e4-8271-65e0f7a27e1f.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 0xa184191a55d6bfa8465a6e4d92e3415f1e9fc76340b6f8d422321fe076da5f8f. 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/TCACU1615826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11716cea49282d4bb00392f51322b4bb90bf9c0b716f231d4ba44b017ddcc4d0. 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/TCACK1579735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c836fd055931141d681d3812a07c903812f812a11da8977b35610873553c0b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZPLR2490040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16127eb30e24696aed7ef7bd4101e3ad073ae7303e8c3f90e8aa7936f56ef299. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZTB72306860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a8d47926706b7660f3f5b52a34c23e39a6c453df7abd8fd533c1992968aeb5. 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/QZPLR2490041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd185e7b365cfdaf20f4fda1dbd8ef1a964d31dcf6e67c6423b2c2b377e2c5b55. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZMEQ2415513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e6651b6b5c998335e8ceeea33d08b26a29dc482e3f540d909f99ec2d1c85b6. 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/QZPLR2490043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed4fd926391e5c19c78cb25fa538165a06f07262c94e51d90c29153880ee809. 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/QZPLR2490044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6367c824ff47970a482a43548e5ffa061a1230585791e863bd560d98ecc440. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZPLR2490045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4340ffbf92241c7ccd41ace9be98d711032c60652710803a80c47c82655f3359. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZPLR2490046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357fc8bbcff654269d836de94fba5058114a7b4d0cb1b065138bc3bd196b5af7. 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/QZPLR2490047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74170f942740afc5dd51cb3d6c6fec746bdeb2033557adc785e57591a05c8c2e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZPLR2490048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b8d87b6462f567ba0fc8a2a1c19204cfb0b4b54acac96f73769c03454200ec. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZPLR2490049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4361436171bfa52260681e825068200631c2b0ea889b5728d5dde792fd097ee8. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZPLR2490050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489df6ad5b3ff235286f063070a39d71990fffa0ed4b1779443c04ac305e75b2. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZPLR2490051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d78c23fd8e4f9bf2c84aa16e36df618df6ee574c52f721200f7a1472cdcc0e9. 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/QZPLR2490052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aa977cdfa6cdc7becb31d63773a95ee0bccc0c593f266fab6f5acc36dd99c2. 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/SE6QE2340855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49891e6bf00c296a263d81aec15f466120ed11dd874851771a8bd04a7e44ed11. 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/SE6QE2340857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6676db452389ea8883f19824be8d47e1214b60d90f2529e3f33d68193b71ce. 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/SE6QE2340860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77cfeac5d2243a0524ef8add439fcdbab5b9dda70222120e22e9f74ca3ef4af. 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/QZHN92102839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79783d0c876e7566abe76abd31111ce24aff6158b2579077e0881355db18d92d. 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/QZFZ22396702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae0fb61c7cea2bab20996c83bef1c04f02af50a646028be75296e2ad3af509. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZMEQ2221426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72a0d73683f20b101219517e35f82194b3e918841f1aa2ded19293656cc51aa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTPX2459684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd193e6f20f5549dd03555f9b52e808cbd3d3455347dbc764340ec574f0391c2b. 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/QZTPX2459691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef855f86f7a9851dbccad3400bcac220e62db9dc9108efee4a6132000eb9a8ee. 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/QZTPX2459693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541f4b0f0443078daf699d0382bb832f7cb4032ece1ed20a790edec80db12e39. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZHNB2240574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5721b8accab1d9eb5d400afdb125c2dc5574820dbbf74290f9f16d79f194f75. 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/QZHNB2240575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35beb10bac98ebed6b25af6d0e0c29384d0a7e8a51f52ef8dfd7bb4b55c10a4a. 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/QZHNB2240576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d058b9ff5f62cb5a132141badb0ac77bf21b28ff1a21b4989bc1342e9efefd4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHNB2240577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19006e3dbe824a31b2055b99c7bf2df42a55a592899c4f9f3ed7ca5056e92831. 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/QZHNB2240578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc770b226973da8d9c78eb0f3f2315db929255cc0e4bd6e30a415d4e427f3b909. 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/QZHNB2240579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d6105bdfc3e6972dbf06c62a58b402a28206085389f0878984647ce563af8. 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/QZHNB2240580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d50f17873a1614860dde9e0cce9e807c3ea4367a6c868a8dfc5b4bff91193. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHNB2240581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c06ecb0f2be1bacc16c11fb51ddf24c8bfdb5f2bbd6fec2d7c6071743f47cf. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZK6J2103717.