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 0x4307bb7d4dc0f5f0acd1998b07b83882a361cae15e5ee086fce27c85b353a74a. 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/d4f494c7-80a3-4dac-b636-4b08c21e2640.json and https://artists.proofprofile.net/proofs/artist/d4f494c7-80a3-4dac-b636-4b08c21e2640.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 0x65da56ba75cdf446bdc9d4f2ac68cc1c87c9c4cdb4790a4e8c0f4ee610403173. 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/QZTBC2454507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92893562c758d3654fbafef4c9631bb5a7f0bff6d34d0df54faa213fb45b616b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:21:17Z), 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/QZDA42592854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cccf8124c61b648cbc31469d898736e1253ed623ddec33e634f3783e8a4d2a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:39Z), 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/QZDA42592855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c72fb6d885ddf966a040bb4ee4594f162f0111ba9e469c562f76266c8aac190. 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/QZDA42592857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7034de07c8f6aa9888a1e4bf62760f22a70e709865d67fd12be70f8b7c3bfb62. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA72594076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8144f73624c9686f9c38777b091568b032371b69c21c0bec454997a2efd26ad6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:14Z), 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/QZDA82535332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2662e92d8dc4ea6275358c904a7e1afa5995e9033e8a1f1ee00f553f9bba84c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES92513162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79f333ee2f2802a52f7208c9ba342830a84d882aa34d5ab94a3b6430b40976. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN82501261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2633005e144fbd77f6528fc9882087b6c6c1e909a7b2be1e897b6c51c6c98cfd. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:17Z), 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/QZHN92554815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f2db0ba8f3f27b2ebb908712982fbfa2e6c2862b5adb6ab32c8554699946e2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNA2594679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a72e903c3d7caea3e3a2eaa59a88da52dc9966df23153e417a502d6fc76c99. 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/QZHNB2569580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a87d728844bc95a63d885231bd665a223bf396e188a8797a7f42dc5c2809b0a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZK6P2506030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d4a56ebb4e6ac37028866eb3a9217ecbf7bcdc09ec6047c1b56f623a2667a9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:45:05Z), 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/QZK6L2568050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3c9400c23f3fe2fbada94d9be31b65527f5fa90a4f225a0026e4df2ecb178c. 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/QZK6H2536285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79defde3a24dba366085e8ea8a8145e10034dc04eb5e2a920276d0298a549eea. 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/QZMEP2521435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba56938f49f53694c0443484a8a2f488c21c901d78b92b7fea3bb81d488ed4. 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/QZNWR2504881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9f0b6ddb12acb4028d8a49b8749c00584f52cb0aae9b667e39cda0963aa0a0. 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/QZNWS2549248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a061b65a3c0380e5bce48439684d0980f7be006c3df96a6e0ce607619491fdd. 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/QZRP42585172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75042dc5a0f7bf017f3f92e83895931e338546d41dabf8021017b090a9a1dfb4. 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/QZTBE2564358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd810cbc9083132990dbe8a8059d8c810108861cda94fb0d3ab7006f9050013b9. 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/QZWFN2506177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4570917e9f3e3b827df4fe6fa535ca1d036b4cdc0b67638330a8d049071b246. 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/QZWFU2587349.