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 0xc28cd717539e1cb31542de00035c7a05f4339be1339e7d7cde142b2d4d6155cb. 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/0752ab90-d8e4-4dc8-ab1f-ffdf5a03a6a6.json and https://artists.proofprofile.net/proofs/artist/0752ab90-d8e4-4dc8-ab1f-ffdf5a03a6a6.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 0x8e0ce5ab3b7d9e05660f96d8103d7fe4a5135c65b639f26d36ad1c7a4d8024a6. 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/QZFZ62498845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1577f27870ddb8626759a8e8be790016a5ffa6904750f965df9056c8304c8f9d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZFZ62498846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa59a09503f67aee6532000fee1ae8cdf6ff77d11f099a10c8a639466a11f9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ62498840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc651bab1b578ef7e5952fa49208bccaca8b5198709abbb7db662732637143e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6XW2424814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9988fce6ae5f90326632f5f01f7cb1c436099317c9f32491d82f7e6f23be4451. 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/SE6XW2424830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5fca682aeee88b7175c7fdd0b2bab109d6097e5095beb31c69a76bc2f26b14. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6XW2426923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abdc58983fe64986f8ca04bebc656fb026765166e485b3b4d2aaa44b52b2016. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/SE6XW2430474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81a728efcf33b0d4b3a7b8c7d9f0e4d934ef9cc30ba7953b642e9bf855df2bc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE6XW2430503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eea917c00df6ce0d427cb233e137834d13daf98fe137c6fc165eeec2d93f2e. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/SE6XW2430504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dd547f90fc7d25270dba94f30e54f824e7ddd0e76c3aa5e1ca03f8d0fc90ad. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:12:49Z), 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/SE5BU2508264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c9ca63bfad155a257ffa8e6baaa1fffd74c991f154774d26b2c2f5a0073ab5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:37Z), 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/SE5BU2508265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c45a4f51798d011183c4dfe341f654b1fbdfca28c68dfa38a0c8f25711b477. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/SE5BU2508266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f166a50fdb68d524166d7b5f13422c12b362f5d066681224ce20fdb67e675ef. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SE5BU2508267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20193042b183a52bb2efcd7750036bdc856634b037c325bf1b9f59a970ef5fe. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE5BU2508268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49764cb856e1a1d8b26d668ac3694a98f2165a0199c077ef94299195ba1e312. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5BU2508270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2232f53597cdb2ce0a85740d052115a1a42b50c6b726876757895e139c0fe59. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE6QE2466019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10605fc041a10d8046079aa2b56d77b0cbe2bad183f52c47e22e99693d0506cc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE6QE2466020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ad4015a84bc76dc8edf5caa5db28b7291be93af3cce170fec28739405925f4. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/SE6QE2466022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a93632c4cddb6582908ff7cb0499b409f7207a0b230a280346640508112f40f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6QE2466024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31529e0858e44179893158e696f0a7ce5b6372bc16d528a11b9b42b825d0efe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6QE2466023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfc5466b640dad7772da1b0f52113055d478c6f12e571f8fe5bc18df803ea20. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/SE5BU2549899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55877ff07f25207d4f149e359900b87ba827240107198ff3e969d78b3a433143. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5BU2549901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce38024c7a963b9078b9f1de03aefa7a59cd4f9cf33acaafb097768a3d4adcde. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE5BU2577922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f1ac456ae4a10b96dda2b82f3aa073f64a30c7f9c11d6d8cc287200deb4ec9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:54:48Z), 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/SE5BU2577924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9edad30d46d6bfedced246f900053f970383c3c49970301441c60d1e7ea376. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:45:29Z), 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/SE5BU2577929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57642a59bcdb0c7e24e9edbc6199f0587a18b59ebdea4349b14206a6da3a375e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XX2580602.