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 0xf0a3770e609fc0091fd759539b6e18feba8fecbc02ed4c14089101f136a5b93e. 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/48a137dc-f274-4596-831a-9e55e5ce475b.json and https://artists.proofprofile.net/proofs/artist/48a137dc-f274-4596-831a-9e55e5ce475b.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 0x1583dbd9e152a172b22650655718d6391d03d1cfcc6d72cf006cede8657a48a1. 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/QZDA62426647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc055197e1941107bbcbefcd8ce2d493fea73fd8464669481fec6a69560e789d8. 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/QZNWR2473354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2565171ecec51a74284f4f27a452e3283a36246758987388e2e2afca3a631b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNWR2473355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7217995d7f2db912061aa37be1db75b4d6459f4cd8b37bc0625bb82d17df7a82. 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/QZNWR2473356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef41c6dc5c5c284826bf098f8caf011ea3a0e82a84138de5fd357ab6b81042. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNWR2473360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd20d46633f3ea85a471d7740da26371e1bf578fd675488a5039c1df080c638a. 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/QZNWR2473366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305d314f8f5dfaa0bb69b1615c4c8028d99f8753bd0bce656e0c18fcd9f9ae67. 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/QZNWR2473369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd990914bf9f3e490002abf3e83520e1c75cedb001070244fd6c571643ace1400. 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/QZTBA2470681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a69a6f9f6be6dc962f99d724380f0380ee72bc5ce539008467449123e5e868. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZTBA2470682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf306dbce52a841fd8ba8e1e7aa6a21183c38d241aed35ff63bdb1d749524f4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTBA2470684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5688737201957fb3c7f345e58add2327009d09bfef0bf752bd722bdac8bd77e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:18:28Z), 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/QZTBA2470686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7af8c10f5499c7764c83f5f1432154755d4a3aab25b42c788b5446c087ea6f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBA2470688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2f7a7c2ee61f576f67538e209978649440ab93dcba7de8b5090974b681771a. 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/QZWFM2428839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9ca4bb55c351225e51b1df7f27611f82b74972562a17a32c4ab9c5478281f3. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZK6H2512300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79c58466b405336a6e0aa8a20f5069905e8525a7db572851d917182e5d9e108. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:35:20Z), 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/QZK6H2512301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75feebd05e2e2722124fe6fa8ed9f5c4ca2bc1e15efe4338d12c516de250cc0c. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZK6H2512302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baabca90fbeef75cd1d769cb42b398ac187d219e4ac53e8d8b7006939d72608. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6H2512304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ff86a735b1f99132b421463fd90c66ed48de549d427f708ea6cca2c9f6911b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:57:46Z), 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/QZK6H2512307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9505d10fc072f5a1d6b8a74822fdb37a4de8e2a8f026d095f6db72d329e79656. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:43Z), 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/QZK6H2512308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439b8cd5e65b841577fd8adbd889336e77c47fafb001aa3a79081897c2762109. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:06Z), 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/QZNWV2569493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffbf7fb559ec93f8a543115f34ce958a60462ec3dc00df2cfa1a1ffce594977. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFV2564067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8a9943427a5b91fa51725e7b64cda1fb1f98ce5a4d73c177eb2d34068cb83. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ772509407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f1e304e1bf8dda45d7eade9e9cc8d0002a264faa251b4066413425c141af7e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT3FF2520049.