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 0x0cd2dc37dbafb77fa83d2c9aa65e9d78c1cf7431da45b8a45c74c269e518f292. 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/5b35a41d-c415-49c4-b350-6116c307c55d.json and https://artists.proofprofile.net/proofs/artist/5b35a41d-c415-49c4-b350-6116c307c55d.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 0x98c37c466e30bab90e30a69dfe5f16ecc37dfe18be3b32967c1c5ab1779de243. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:51:47Z), 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/QZFYY1930417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200129bedaaf1d51000e029ecc2b74c9dafaf220b1ab8a611964cfcccc376fab. 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/QZHN41994402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd476eefd29876328753af57fcd95d50a9c8739e4415d19fbd46eea8b1ec2744. 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/ZAFWQ2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97a8fd04833dbcc0a6eec2be024662e2b027209ab4b0cd50c241623f563be68. 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/ZAFWQ2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43935853353579f808615ecf3c7d4fb82510f6cda25c7458c2d834def3cd2ca. 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/ZAFWQ2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7616b32f32ffd3e00876f646b15ff3082d14e7fbe12ee691aff8fe8605611f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ZAFWQ2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59b122f955a3ade32f3b9bb71c0bfcb327f3670e8d7353950005f2758812b12. 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/ZAFWQ2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bb391d11e5f77f12d4418f147c600c04421d7e06b2ba7911b21b4fcfa64db2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZAFWQ2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf32eb60918931e2cb7e11d3fe9fe2d1e2cbf55994c241d1d3a6adc2abeb3c0. 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/ZAFWQ2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade8261452e336c5ccdbc5f0c9b3376eb4f834c8c99606329356e0be2e6cb8a8. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:40Z), 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/ZAFWQ2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3938918c6292a4a8b9ed8d54e4bad429b971d595b40d7c8e8b972838e765302. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/ZAFWQ2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd71d05dab35586b883b68c841cc3822db3f20da677a1f83eecafa8be226f63. 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/ZAFWQ2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fead7ee9691cadb3503bbb166b6f5bfa18be1c2829e01ad2cf16ba4c5820cd. 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/ZAFWQ2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aab0eb7cc651ea28efa46f7da93e3d8ed7aabc2e5027e31f00aec23210ab22. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:47Z), 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/ZAFWQ2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fa860d21ff4673475dc63fe39066155097a483e22e2694e3099421f227b114. 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/ZAFWQ2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2105ecee6c8c87adb88af16bfe8cd6d1ba02241e02575eced20fb8018e3edbd7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZAFWQ2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993740782676d4fa8c85eb60925a518a8c5aa4e3d1a4057bee80b687cc5a127b. 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/ZAFWQ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772638d1919356756f78d8b61aa20290500d453f738a02e0c1cdcb828059931e. 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/QZWFJ2475642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c5ee360c1774bb2bcc39bac61826b49f3f41164593b0e135a54d3d74ebc004. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:49:36Z), 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/ZAFWQ2500002.