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 0xae268100df3dc939e40360fe18ac9e4be65adc1bbaf0683651e4e614042d9d7c. 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/fd4c2fad-6d1d-4f2f-adb9-6c10e240fbb9.json and https://artists.proofprofile.net/proofs/artist/fd4c2fad-6d1d-4f2f-adb9-6c10e240fbb9.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 0xa3ff802abf3d6dc1b4d452ce9546754c27d8ede4015ac645cdcd6c28f6f5e5d7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:50:39Z), 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/QZFYZ1914875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f3886ed3743d53356737354b5b46a3a64de8dd7f329b83850f20a51cebe7dd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYZ1913787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d4133012cb0c1e02b78c2ad927cafdbd7d4058ef5d530281470fe4d6d111f0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYZ1913788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc392464851c0eaf55cd4f2f1fe6e224b84216092b7381b59fb4e61205d6ceae. 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/QZFYZ1913789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3df3482625cef49610d3cb68fe45d97e80d0ea16edf68390b771bcfd42ee01. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFYZ1913790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02cfbaf80736fb1223d20d8a0d54f464fdc32cc1c1f77671951bfef525275c7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFYZ1913794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe46cfc4b62bd9bb0239659204b017d2292447462f598c689fab2523d05a641. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZFYZ1948324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b86725029cc579632257ddb64f8a639a2f00959fe545417c289358564a6988. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYZ1948326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9fc99dc070cdde1742fdd7646f1dc999a42c5d04a074ae9b26bf04037e83f1. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:26:03Z), 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/QZFYZ1948327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8731b408ab1ededb0f0fed2a3c3aaf3efe61a56afc6c8cb6aa5ad27c41013a44. 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/QZFYZ1948329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0719161199b4149b4f789acf3911410cf40aad32a180fcdaf0c892f6fc57ef42. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:40:55Z), 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/QZFYY1996432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c48905ea67dbcdc5b7d4e0d5b9344e16fe39b909557a3d7307cb448e275c3d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:57:04Z), 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/QZFYY1996436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf31bb3d455b4dbb73fe8b2490a330863317d7c443a77dbbd972a918731e3dc. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:19:45Z), 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/QZFYY1996437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd234db68d98323e386e1cc51d842f28f748a30d8ee8530d9bf2186ad231554. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYY1979922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5896e3b9b6568f4c9bb85baf75639b1fb332c29aed7f50bfc3b41b5cd9997e3e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYY1975024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944569d41a9cf4b26111c9f47ec4a06c9424a09e0a5e54035d32a92098e09668. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFYY1975027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9267fb2dff6ce8d2a6f58abac103c92da3872e5e8cb265291e8d7f4f28a423b4. 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/QZFYY1996046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6d0037c039d2aef6185f93e4e4eee6a5b1569846a2daf2c440ebdff24fb9a3. 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/QZFYY1996049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cd5bc670826f49b1090b9e08059bbb6ec97903ca4d7e2f87db55900809e74c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:37Z), 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/QZFYY1996052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4336de7ad56c1b755dc32452526b963001f6d2f3da4ca75da2972fa56e8090a7. 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/QZFYY1996053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0912e767bbd08391a1b8a65f7cb7e22852aaec811e73879f2c4cdce5859c23. 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/QZWFE2541195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea99cc0b9ef2660b3517d661bd2df71e90b3b7371af55d6bcb0ec28fe5c22e68. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:00:48Z), 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/QZHNA2089080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2440ebba0f25e61b5c1490a083d4bd8b6c636af120d90ecf09e3569b6122195c. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZNWQ2061889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8da699757971b561dac50b791390c335805a71f3e61d907e0a32cb67335cd94. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNWQ2061891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6682ffabf6035be8b6ba41344b5547124a61a1e5f194e47b82e705a33073396. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:58Z), 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/QZNWQ2061893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd21c615549c148b9bd6ac9c21328c5777d183f4a22e6816f5a0918dfba58cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA52310798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e3647db2a848b7b66cf5bf95ec907c3eeac2a5f2c6482aab3c3ab52d72406e. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZTBE2485584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2320431a19fe63aa17cd28176878e63f45c387e96fceb5e422b2b8efdd186afb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBE2485586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f0b8c151334f1a409582281418851ebc46a1b4b08649a21b04e60c9483dfa6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:28:56Z), 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/QZTBE2485587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4701997e2d00d419801bab55f2cf30157cc42fc57d32126202baf3c1cc8cca8. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:38Z), 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/QZTBE2485590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6956c8325b8a53d82bff87628a2cadabad0b91d5fe7d0c4958bd2f1645e20c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:42Z), 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/QZTBE2485591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b497d0e6de813d5910ea8acfe5634ea1f3b1f377d916dd7f204f541a51ae904. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:45:46Z), 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/QZTBE2485592.