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 0x2ad9a4f4225fe1833f068de7c48bba7485cb45265c0b37a80405681bf15b203e. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fadc807d-c121-4b1c-9a5e-72399a6dffdb.json and https://artists.proofprofile.net/proofs/artist/fadc807d-c121-4b1c-9a5e-72399a6dffdb.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 0x38c1dc3618fe6ae179cdc43524782986792d52b98fa79921733a2a6da4035ea4. 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/ATN262110202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efd59a1e573afd55f88f5c08b34423575c2e01d7a4fa9b2a93d8b03b8a8ea80. 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/ATN262110203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85833c9480df5c1041f4e888ec6618a6fd534a2fcd1ff2874a09c599ed8acf93. 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/ATN262110206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9592df7ea1fa5f517d392a1d8fb8c8c1842c8cc3c5539da708753c278f3661ab. 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/ATN262110207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbefc3ca0bc837bcf6711f0ab6fce3bd5774e5c3d0ccb9d5b1ad8a1c49f0fa31. 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/ATN262110208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56f39bec0381341abaaffdcb066358f1d7312c84f2f9c3f4e51f7742e09c74. 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/ATN262110209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1482b1595bb4f29eed750d6649734aaa1776dc9bc8280234fe34633d4a05cc3. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/ATN262110201.
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 0x27c13a2dd7c2d0b3b962737211abe481d2ff5235751c6179342a0efdd05ac299. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ATN262110205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefdbe1745b8175de54bc92057f098a89b182f45ad3e8d16b785ae9983e4a1f2. 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/QZDA82077615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8876ca3e2a9aba8b9d28580616d24ba9764699a05fafecd7a353e58a00521490. 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/QZDA82077616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2581dc45bb4463efd3a013f581a24095cd2edb1b7551a23fab534b025e8598. 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/QZFZ52086701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9d13ac802b1b19e10b993b9a288f53eae62bf758e7a88de4b5d42bbc6cb8a6. 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/QZDA82077617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0b4ae3d292a33341fc591bc4d0c1763ff106de5ef0cfc67c43c58fcac9c949. 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/QZDA82077618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bffd3c6943168b0f1c634fb6f38026c07f0f8832a921e10bbb1b270f865e18. 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/QZDA82077619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6977481fc0895041e77b6b96596cf224373c0b1d32db3c4084bc6f172805a7. 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/QZDA82077620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73161325c657205aa8287cbeed5c9b0158f0af861e9b05c79b3aaaff7390c621. 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/QZDA82077622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7e4c6aac5377bffdc41eb30cad127ffe994155c38727e867adb13aa78ce9f5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA82077623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9c0e69cdf2d3fca7ea38c9bf16579c5f7a11c22c72c452ca9d65aebd55fe61. 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/QZDA82077621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31ca609d1ea9ad485c7eab7b9712267e8fb3bd2684998d66a09c9d626c2610f. 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/QZ9A71800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf4c7568c8805e0d00f631f3c9a5d6ea58fd8cd96becfa55f2bfa8c9c3b73f1. 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/QZ9A71800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e7f016290348a076c796b7b850edddf4107a2f0d8c9a4854e47d12ec204abe. 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/QZ9A71800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7548e158c9ac905ad30e75b5bc1144646c6038e7eb14b3fd57a71189c083c89c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZ9A71800029.