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 0xb27de07ca88daee3a07ba2479e25ca5b12c02622d744fa5b3590ac5fbec9bc32. 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/e9c22872-abb1-4f98-972c-dd9f13da2778.json and https://artists.proofprofile.net/proofs/artist/e9c22872-abb1-4f98-972c-dd9f13da2778.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 0xb0e52debac4ea344eb4f1e0dc2828df352fbec2adb7199a639f1192546993158. 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/QZNJZ2201886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc5f6a7b381fe28184da4932008fb7e716bdf6268699de00a15054ded25cd72. 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/QZNJX2199516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e6501b28ac48cb61ec440c066d726e5935bf1d05f0d05fc572dc94b6f8e04f. 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/QZNJX2199519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82371166bd1ee53bab8fa3c26c86e42e8a37115e9283acccf8b5a1c255531d6. 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/QZNJX2199521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f07ee2554850e61b1796347168ff20a462f668abd7f2c0dba121d5977448f4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNJX2199515.
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 0xf21eede4582d19368403635ce48acf3f2b49bb024a9e9576b1d7eb41d62b9639. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJX2199517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70677d05c0b59b94220fde0985884c96478590d905bb792ce823312da58b598c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZNJX2199520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f71051aed871310fcb76cab3a551759ab38cb7280dc32fe2c80e0af9259721. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZNJX2199523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a67cc4d9d2279b465cc3fd8d6f9d4160c3ea58844bedfe4d41cbec203a7ca. 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/QZGLM2536914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815752f5ca9053f097777eac7c8cabf93914f320648fc4aefacb4f3bc2eacddb. 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/SE5BU2539725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c40286bafa95362dd10546ec0cc8529f51caa382bfb587f1a6223f7f9286bed. 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/SE5BU2514358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfdfa16533764539d5a04cea51d6f8b864309ac4c63a4335ab82b5e6d0cce5a. 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/SE5BU2505581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db64229e0b13f73951dea8610f8dfe6c9e955092fb4052469e3e19cfb2c5ce3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE5BU2501457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf508f06345e5a2c381f8f5528243cb735b048931c9d5899febd098710e1d6b12. 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/SE6SA2485525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec281c3a6b4779bfec47147ccfe203dfdb3e796ed9d8cee53866705602ec775. 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/SE6SA2483925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8633997e000bec3f4e6a585dbfe93fef33faf08daf9ca785e9791e6b898afd94. 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/SE6SA2484765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa1e2db1b78eb58bc2a2cda06aad44aaf734a1937044ef43e9a8200bfed1caa. 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/SE6SA2432508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a60301e07d2f3932cb54aba166b8f087b7082c9221184ea41a2b217ef1631. 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/GXD7G2286200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf58e735e5213c7190c4510c7070cec81878f9520140f79fbf54b6c64c32bbf7. 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/QZTVM2439598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211b70e3e08f601dfa1b6b25fc1997db14a0d5245646a64a740c523bbd006a43. 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/SE6QE2444837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3e968c2bb23ebb055a6d937d06c11daf4ecf785420ed5dfbae998312ca028. 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/SE6QE2462314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7b84dd8bc63df6bdace166be02f572cd4502521b54211569f820d128835dea. 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/SE6QE2469277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5950a714a7b394e9cf668e5b4c4e94afb03b44888c7183257267598e15f12ef0. 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/SE6QE2423313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0386c0a8cb738a456e5658b018753a32112d3de3508b8fb6f2f828f0ce3cf89. 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/SGW502414075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1813c2201d920f3cec8df6f5e46154afa4cb62c6d0bb6b543e4da84c2dda1d90. 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/QZNJX2240584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4f23f393e4e1fa2d8473680c989a768ffdec086d563f6dcb54b92ca5f5ba22. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2441391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96af5142c9b8d28ab93c302ac6afbd2d39cc75cc696ef9506a842bdf1b82737. 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/USA2P2441398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d485dd1c7fc32389285c3f75f255ca542486f54da22f3001642ccf35eb688f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXUM62300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca596246b9809ad0c2d518760f5462d1f28679696295ff7a2d5c0815a49f6d6. 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/MXUM62300546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6970d2d5406ea559d6db9dce6873eb434739158040f3fccf7a5f498e61e5c6e9. 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/QZGLM2322724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3964aa1db77153f3f1d4e30c874128b09a06ec8df5b24572ce8b3a86dc18afc0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNJZ2270624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1081ea42d45f5a88ea6016cfe3cd0bcdb2b817e4051dd3871ed5866c821ada70. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHZ42025506.