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 0x17595287bb3dedefe41190ea8176bee6858b007f52a1f7ac2ecbb86ddc4941af. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3aedf956-dbb3-4543-9230-a28799c7fa84.json and https://artists.proofprofile.net/proofs/artist/3aedf956-dbb3-4543-9230-a28799c7fa84.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 0xc34d3cd9386a6be363e650160390a48ebfaafca7a0a50c3a2998806609dd2f8a. 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/DGA082465040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d68e67c7962bbb76f12aa85b18db252d59a77dda4a4a4520016061eaf0258b1. 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/GXD7G2480037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9f2fd85051e9e26d15a69dc5e458be5419873380da3c5ee5198ec3c8dd2a4d. 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/FRX202321343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78e219cb76f5705bcc8822e0d925a2831f739a5d343add7a47ca9a0af0bba5b. 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/SE5BU2167302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dd772c64e9dba0779c307aeb895529e9a04d277e8d012e7fdfa0433c89b8ce. 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/FR96X1962844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35554640c633b91a43987149ae8f63e74ee97847010356ee82061fb3b393a56d. 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/FR96X1890208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c405602212fe7836632cabb4b22d8f52ca4181f219d204c45a456cf4ae4a5d. 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/FR2X41885448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f6046692c8742fa64f95ffc1561325042e349c6c460c7455a91f641e7cb95e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR10S1864110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaae85854cb3be5f7c1af91d99a0b81528964145dcab580f5b92ca6d5d4859c. 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/FR10S1864111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb83cb94d4387335723c544b86b45bb9c550a5af47787bec31e71502c5e00af. 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/FR10S1864114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd04d056943334923c01455e25a2316fc1090e185ce2b5f4c71280d2ea2952f8. 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/FR10S1864112.
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 0x5eaed554e0aa21dddf5956bd1027032aab8d60bf4db987eedad06d1976e249b5. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/FR10S1864113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4934bb55082fa2fc3837573804bb544fe5bf3bdec059343aeb3d454f108cf0bd. 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/FR2X41742700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f1023ebe52e3ac250f44116a656234529c2998285d44be2d3bd44363ea062. 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/IDA431916383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7179589919a4fe6da197254a9697bf6849594945d07c1c781ee90da359decc19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IDA431916385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11977a9992cf3e818d7a28586f2d836a12b3e9e737a9b55c4ff7f5f49e87fedc. 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/IDA431916386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9491ac4f67fa3702575cb8d15d54dddb8706deea7a6bc8699edee1417e3cc1b1. 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/IDA431916387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859ef361a524e4da9f555eb5f7c1fcdbb230d02e581f26bfce7acfa86b0c9486. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IDA431916388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c171b01d7c1caa2d9da3ed58e0b6a6900973a5c41b457079c5fabc5262bd17. 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/IDA431916389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9503d6a77c8f98f208d68525be98075d448235063f0b683fe9c122cd763cffec. 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/IDA431916392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a72b3199513ee24d8d1ffbde653b422ebdc55f5f6456fbaa6852492a24c40. 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/IDA142103218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91f9c77238cc2ea5b0b866582121f6066b7e7faaba9cfee3b3306dd5f181212. 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/QZFZ52065819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd7d347b7bd91eaff66bbb67c769bcc9c9fc66751f76104ca38152838d0f84b. 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/QZFZ52065822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf2dc403dc26597338bf151d0a89830fc554d014fff41be66cb5a88bd798458. 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/QZFZ52065820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f06c9c7471071a19351c59e5b87e3c383bb13abb6e32a3021c4f703afd81d05. 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/IDA431916398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1450ef21df19e01ae02d342c8bd26c84855f5ddb35f868c05ed2416a094f99. 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/GBSMU9073987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bece43d7a3898d0e6e8960f22c4163789e9ae021e861ac4681e2df5e969f70a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBSMU9073988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8021be0924e4730a11f19e3565b9f53825390b4710118b23ff155958c105b873. 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/GBSMU9073989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e8fd32a3ebcbdfc4b645ec5ac49ae0c15d8d86b0f5fe530ecdfdb41a5d05bf. 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/GBSMU9073991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57128e970810cdd79a2d6a108a1616083a5cabe84fa2d19d21dccbeb2adb42d4. 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/DGA0L2433244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b29249fe0a9fb56d007127931a856495dc6f58a64d7cb01ff5f5d2fb6c63fe6. 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/QZFZ52067945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31f344eb2d90dea795188544a3b26a59ee50d335a7cc4a381043c0aa31615d3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFZ52067942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae374c5ca518caf598c28d3879ba409b2b5508fe74719cd1944107a962436c76. 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/DGA0R2409781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255180e15d7ed22f6e8d8de96d359d58e8868c489719de61bcc8089a6e8ba538. 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/DGA0R2409784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405b0affbd30588ff0272c879af3616382e4704d265866d60d7249a6bd0870d3. 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/DGA0R2409785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68f1579870a69dd4118107e60550d9f5b74a4614a52e1bdeb2cfd7f9d665078. 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/DGA0R2409786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78a20daab394e5370868af1d7b2c7a9a139e008b8e8e2c3a3e9be68664e5194. 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/DGA0R2409787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b25c07870edad1b2763c20d4e4d0fe2714da551ed7442a0f3e9870e277ee29. 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/DGA0R2409788.