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 0x158a12edf04e0a41c69e855386ba80d2cb2cdc977541bc8cb9354474b9bfd3fa. 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/40050355-4506-4ddb-b1c5-b9a2626f02b2.json and https://artists.proofprofile.net/proofs/artist/40050355-4506-4ddb-b1c5-b9a2626f02b2.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 0x0c43f70c5acd3011a6a8c69d6ae7f6d4a6c49c9d78efbcb54437badcd79b2c20. 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/CH6541931230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a6e1169c39335dfb977a1d0286908eeba6bc20688d95e875c24cdeef1bc25. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CH6541642532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7695ff5e914f362922aff581c233dfd825d9b4d5a67332b9a8c4541bab52133d. 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/CH6541642530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fb9edcf6560f72885fc2a4aea8779f8b8758e2377f02063e238bcb3484b4d3. 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/QZHNC2363788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3121ab6a172bd60458bd0656ffa891db03c18a297e48fb4d3884339ef95bb97. 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/QZHNC2363789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb025a9ab2ddac490b5f7838da44e132d8a6c6874bab599a82ccd82bb6f6e3f95. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:33:47Z), 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/QZHNC2363795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5099cc75391afec5c37c1d41c934921025acab469dc282da6ec78a04c8a3a8ad. 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/QZDA62465874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44c2ef84c4ab432774d58eef8912024e70fd9509fb24a0edb30208ed4edd3b1. 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/QZHN82436223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49224aa757e8ca10e57467ef5eb309d7d0a36f2179c4f16e06f5df2cc5967382. 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/QZHN82436225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5099cc75391afec5c37c1d41c934921025acab469dc282da6ec78a04c8a3a8ad. 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/QZDA62465874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ee7000f63c8268e9ac6a6c5f042c5b547f59555e30de1b5e54f27565e36bfe. 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/QZTBD2451943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a64fd98d3598848eafeb2ecc3ffb95d940c02e0f2a43997180c1b4508cae2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN82592932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a19c1f65d9476d190ba8571ae3d593274725089025fe62e0c6e49c163976217. 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/QZHN82592934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198cf6236c8c8e3468a5499e87d6eabf8828ad2299c45bd6cd7771a4e74cf375. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:49:20Z), 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/QZHN82592935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761925d443f0f14054081ef2fd3a286e7908174c56ec9f4863437747d558855e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:40:24Z), 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/QZHN82592936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbb933dc8949cc1bc02503db01fe95a32684e3fd01414b0ef3e74260917a022. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7U2561262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9a0a026a5a6be708b6908fbd17d5562274e358412e20d18b21cfed47650b0c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7U2561263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675f577c76fc5d01f67632d84038c7ea381502297f58b31493cdc306cbdb223c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7U2561264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cc19ab04dffea1240e6a3f8048732aae471356268fd687e0e0af131cbf6532. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7U2561265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ca289a8c2b2b3da5d9bd140ba64a1d48eada35b7759ab69d9c3ba448e9640. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:44Z), 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/QZZ7U2561266.