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 0x13d9f550f400e46adc62ce1d0b524bf8903f73864a87d36baa9cf242ff32fd21. 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/1cc16f9e-8e9a-4e37-9b9f-5831aa37a89a.json and https://artists.proofprofile.net/proofs/artist/1cc16f9e-8e9a-4e37-9b9f-5831aa37a89a.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 0xdd0ed12d68bc918ee801f5d5669f8e4e17578ff6b7455ec59754c28883bfc1d6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWW2435173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce95f1c0f2ef470e57c81c87b79ad75a4b911214b60024adc87c7729f3bab57. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWW2435175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf0da383bdc1323cb10d8dff59c40bff507b69be35ebe0e6a4a6b015347f4ee. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:12Z), 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/QZNWY2400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0e39fddaaca5bf4b4330762ec9d76dfaa8be20fae7eccf7ed3affde7e8a7d0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAY2481151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9129714fe49de5a20b95f2caa911234ac08bf000c29e16987d8ccd97e877f2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB72410990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122fd85e0a39212fccb3fcb611dd6a2dff3620aaec6f8069ae8650fd606ee3d7. 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/QZTBD2431268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e9a18e3178f8dabbbd7dda551873b7f2339913076e94e8d54b02cf98287c39. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFT2467216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c063868162624634a516151591ade73e0ad784c5a27aeb84cf7cc4c2fc199c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFT2467218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f39d9f448617483255cc602fa8e54d23347f0312c96b93a35d3f2c8d7c76b52. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3EY2404194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77246ced9dad0e1d82b94e8b683295421f1b2b626550c22b921190e97b65e6e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFYY2597559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eb761ca7421efebc76489df311467f895d390cf655ef43fc7b991663d3a2d8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:09Z), 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/QZFYY2597560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a9d2373a346f6d6a416a1154b46173489f0f612bf0499dc626156f78230a71. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYY2597561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eec254e0ee40c92234cff01018e9d2e809f7fe2783b3005702a67e667476612. 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/QZFYY2597562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43eccb49660b23b119e6eef3946b67c4b9862aa8b5ca04dfc1acd476769ba266. 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/CA5KR2512677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4de087b98cfba1f4b48259a8b6c9d9841bfefae5d8598ebee66c5fd07e1650. 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/QZES72572750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e5738b94cb32629349115f5eaad090d9eddd11c9a22e249a5f1bfa573a7a18. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES72572752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8633bfe3cd3888c2617c32d40124022c56cf65fcfeccd4cbab1ce8e7bcb781. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES72572753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141cfe70b8b4f05f829336f2bae0056cd9c77126af7bb86357898123aea3ff0b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN62557956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d7481223f7395cc40431988ea95d8342070e556b2e152a95ab473027ef989. 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/QZHN62557958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98afb735c8bfcf18d51ecad2a951fe8f7807c5b1fa7eac0d353a8f4de94a86a. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZHN92541101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba03ba06f740c2e1730f19ed8cc6d2b9e53ed4b7e4a12024e425c8374e51f02d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN92541102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60409e08d8f808fda7c7d363d14a19415cb0bee8f036bd282e499fbe33bfed6b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:03:24Z), 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/QZHNB2518882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd5115948c186f833d323b189fce222f279189ef4895a749024fe4aaf4f4241. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNB2518883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc157d5476384b4ce26165796fd042db4f5d25b73aa120b1951817c431b4fc8dd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:53Z), 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/QZHNB2518884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070fd51ab1efa9470f208728c6f54b9c2648e2272bc90f5eba76b3e42333222a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZHNB2518885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec58ac182cca80c898fd38a60b7710dc22b5e234e8788d806707299ab5353463. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6J2524689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0624d1604ea8d42f6dc53aba4a24cc41ef50495afe3a4134400e14fd69c72000. 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/QZK6J2524690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbbda4becc3dffabfedbb3f957dd58e2f220569faeb7548099f96c1335d4168. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6J2524691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3c926a8662f789acade964717c6583edb1d203d4e123b275e1cbe02b70c221. 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/QZK6J2524692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02463981454b5cfa840ea438241d7e13734a8e4c29705a8d66473625c24077cb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SGW502506394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74817192d4ebf32bf528d0516cff140dfc8a1935c1bb07f4b24c678761673e7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SGW502507661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0083868e4b5ed09689d96f4510a211f6885cc87495f0e1715148ded25c181403. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7Q2572965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186d3cba1533258ceafad309df20bef0f16085617df28a1f810d6f2dcb8b0c8. 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/QZZ7W2587668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a59fe1c9c403cbd2e334ff1385d28eb78877b456856f24dd0ada32e07050e7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3F72537382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4443cbd41925f12ff28def1d1f4020f8ad0710a768a70dbcee562db98616af59. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3F72537385.