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 0xec6395edeb535a0f8f6672690ebfcb3b61e239016dc3918902e3627717c5d67c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01df8b70-c0e9-4f56-9cce-9b3e8d581aa4.json and https://artists.proofprofile.net/proofs/artist/01df8b70-c0e9-4f56-9cce-9b3e8d581aa4.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 0xe13dde10afd52e4581c3076a85bf47c087f8c2a7581e5a902790d8f3df1127a9. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZNWX2017693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e937990549a9d3a6a6d4fa54f18231a898bfed343153c4e65e5f85547ad4a4e. 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/QZNWX2019280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8583e04c19b7ee9f19a7e858a3f430927c21544a6f531d41e9935a848c79fd04. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:01:59Z), 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/QZHNB1971728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529aeb4e29de3e2eada3f2294a6aec8dbcc16cc04c35722270ee07dc6417dc5c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:52Z), 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/QZHNB1971729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf861fa4752cc98bb368f73a166eaabf3f11688d16d0555ed9186d13d7e9026c5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZHNB1971732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aac8be63017ba9cc5802d5794a83d89ba79671c6ed436f70a366d9bca5f2f4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNB1971733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856412d048fa7a905d955afb581c35580f7144554e00e45eb245091cecc397b. 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/QZHNB1971734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004dc11cf36b74563aba2a28b987c5c7589997f96c3462aa256a3c2614ae1948. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:02Z), 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/QZHNB1971735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4cc1b9c3a78c47800536bae3cbf1c9840642b173ea979b20ed2e6b55f5e57c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:40Z), 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/QZHNB1971736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715eaee481ec5c7b62e3bab5179969e3d8ea7d32174dec31b2377191c1d32227. 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/QZHNB1971737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57821c3dfa009204a767c21a9d4b2b78f7789e0d66c40af3cbc7d4eedcf9b66. 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/QZHNB1973611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa5fad772389cca7e9c40578e834e018696b341f3193f18b7c4cf728b6e783c. 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/QZHNB1973612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb059f95d82f3b28f6fbc00947494f67478f86739d82298080982210d9a197. 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/QZHNB1973613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5cbb37174eb7ec4ea0913b5ac513c548e6454860a77d56e233e8e67851d38b. 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/QZHNB1973614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0295431a18525ffde8bb17b8bec7c4dd6949622e1add9b045e9065385bf4184. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNB1973615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a8a3204a7adf43660ed39f223c091b66babd3a3102bf5d36f9500087c2adf. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNB1973007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde068a9e4a504402eb12d33a068ccc6cc19d368f2b3308e2e1c61aa5a7d908d9. 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/QZHNB1973009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9dd43e3a1788411fa74d59553e56b0608db7dfbb5fb0d92c77188e8bf139de. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:56Z), 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/QZHNB1973010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6558949fef5517b82a8766cf84a1a75da76f6cb327e2e96ca1b50d7c0f036bff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHNB1973016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b0d362d2a0ff7c028324ffe8a2a918b0de9fb2663b0783da44357e19a99c22. 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/QZHNC1980475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a6b97436ff25cf7149722f3ad16e5d44c47c9341de1d00ef40058597624e7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHNC1980476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73602a33665258d7a04b4bfddab18ad89e148d33ad52b8bee9863884376c88dc. 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/QZHNC1980478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefc6d19ce3fb98bc9b378fe739fc1e4505e8c094a0f0d18175e91e2bf885998. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHNC1980479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd018ecd8d353a20eb1b7307c1a5b75797ea1396bfbd026f9832bbcd5ad99ac87. 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/QZHNC1980480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7825c50ed402f10b702a0d502d99e92eabd05d68a341ed7d6bbdbba03128f589. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZHNC1980481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51d48029ab55f9d4933a5712ff5a5e06a80352a78e5306fcb93a27d0f4a81b5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:21Z), 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/QZHNC1980483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3933b23111fc83528bf0d6db424dba2f76aacf3d3db7152e8b234089b17c2c87. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHNC1980484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e0e4976286518a8b73004f9964b60703c398fbe80cce79acbbded4f529e471. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:49Z), 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/QZHNC1980485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dd852b3742d58de47de99667f4f8da8cd4e5645b9b05177469ff8e1096f891. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZNWX2019282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c745b85119bd4a962d7f8679f916167c45fa198aff0110397f8ad5bb4cae4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZMEM2521732.