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 0x0a1530b7768f9deed860cf49f2ec87a546a065c9f46ebe713d1d64c700ea0bed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84d8adda-2f48-4295-9d88-2c532085ab17.json and https://artists.proofprofile.net/proofs/artist/84d8adda-2f48-4295-9d88-2c532085ab17.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 0x7b1e81464398b101ad8320e140d0ad69288f96c1dbcfe96228dcf845e5a1a37b. 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/USNO19300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2861abbc97cb0810518b312eb4361df35375b5556ff4db9c3227a978e101a2a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USNO19300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa67eb6582a8ec4efd94fae92872160d3fa8103a829bc3f74a8442ad6737eca. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USNO19300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee6fa021c08ed2f5ea8789ea2b0be94011427ed8b5b6708a40dd2abea0a4a99. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:30Z), 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/USRC10400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe320eb94572604120aa8a170a41a2afcd020810893a130731c8cf68bc319916. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USRC19401124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b0459d39cac1a4bef9e592f6547f935b8011a165e51d9665e61703ace76fc6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USRC19401127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3127004626481c390b9be22d0bdad304e5b80e5bc6c705eb298f8452a7208. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USRC19401131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8269efa9dc25326f411075f0209cab17a33f76305fd0c0ec52edc331ccec9131. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:57:59Z), 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/USNA10017239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc24ea8fe334b00bcfdc5075c91eec007a7396cbfd8536d681f48aa0088640c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USNA10017242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b3bf2ad22905756c727b023dcefe928bcd7bbffe2c121fd39ec24f18fe72ab. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:48:22Z), 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/USNA10218649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca541cacde3b9aabc49d7df64dd1e3ffd8790c482a458eeee190e35a4e4f0be. 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/USNA10218650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7b8afe44a65ce6180a1e9e499e15e2646a2128e86b71e8958a95d9fe4f938f. 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/USNA10218655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b3983d053ea9061ca97cc54cb9d33d7934b3e2e3a4892d667aacfbab672b03. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USNA10218656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0115f2d939ed0d9336a60b4d1591dce88ad9f8875d051d3c00a06f552ecaeb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USNA10218916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9846bfd76d3c8ba6290215a4a58f441ce29964dcaaf581f878bca80e54a74993. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USKO10800985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba4f488b18b5dd9aab6d9d0f73e215ad72cceb19b71846accc3275ea6251958. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:25:20Z), 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/USKO10800986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675f5a148127e3973c7dd23e1dbd273ffcae24af391954f9d3262c4aff2aaef9. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/USKO10800987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d754ae2bada9fb3fd3fd0676fdc178683087adf6e5265a90310c9e9a48b38. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USKO10800989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e89f2bab98971bf3af8ed1951378c26f7c08d03825009a800307a1f20855773. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:48:43Z), 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/USX9P1370436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16ac43dd85a6c44fcac55459b3b51b86c550606f5fc6b769c8e452ac5258c29. 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/USNA10017283.
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 0xbe86ed5b401e378015a9b1ed8d8718404cc8c55751d6be09da243adca2ccb315. 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/USJ2P0799310.