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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329d913ad8d3c7d7425b3a33907495c9e64de3a31dd67af02532f05e31cde33a. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77936bcc-5246-4947-a339-bfeafd8fee17.json and https://artists.proofprofile.net/proofs/artist/77936bcc-5246-4947-a339-bfeafd8fee17.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f331356f790d4f97b119cb093495b08defb97ea3b06f42e458b82ad1dd3094b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTPX2322632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e857306f8d6e4a2b2f0b7c8d1fdb27a993a0c71acb60a3e907ca53c08dc4df. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ISCRQ2331587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc285ed63d2662aa6012dc24a7ff1ab39d71f2d785137d9dbd43b944d1be87ff5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2322633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75dcd52da594b60dc6cb0edfe60ae51350e8079ab6f232e5cb445d6c429b2a. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZTPX2322631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0c404dd7f99b381d1c79b5c11bb70e44a8028aa0d807d628fb7ccaaf03bf15. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTPX2322635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8b177ad2a081f1aa613472f07a896f670d2cf58ea1ce57c3ffdbb3606d23aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTPX2322636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ab360ee319cd218b80c926757c1f1f0ab00b355300012acf7b8c91f2aa347b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTPX2322637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9455ba6060970c54484ce761760daa83d580d03db05cc6551e7af0104a7c0f54. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJV2012518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a21938db13a6da654ceff7ca555f4c79c4dd94454739269f6eb18b4bf75607f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJV2012519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f251fe640dae926693df81fe4fb0b14a1aceaf00d8d0eba747698fc1c5221c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJV2012520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cf6fe0fc4527e6d24eced217310190a407d9c96e63bb34c866dbf88977bc3b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNJV2012521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0149de0dc430252bffff39e3f388d68ee06226c857d0795efa274bf0bb9c834a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZNJV2012522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a10272e34a3b646609ead771e90c5b8a64634d25493d0c53025a3a7573c4ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRTRB1990407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd3e710e6e39d061a2472673b5a546811507452c1653cb1843622d0a6dc9ce2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRTRB1990410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a908a9a13280c560cccb624289bde7a2dd47105cc6d64421aff103d3916f5. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRTRB1990414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c79fa6de0404c46d2e4f351e85ac3079fd738b347b3830a54e9910acc1968d4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRTRB1990415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff20bf081f0df8b8d6573e7b69cd52153cd6ffe139ef78e9d1d96296667d82a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRTRB1990419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243db1d9f75a11aebf3b964a16396cea265bdbc7139d6ff613f7bfd9fa06d97e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXVMN1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d589e812c85b15eedb2a666ecbe52f5097831d49d9014c31a50e1843b388b69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1907023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e528f8f2167f7dc843f1c3e6bcf9ce79dfc4a4b76e7af198d5bb1dc2c302fe. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BXVMN1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5550155ae940ecb247182eff8ac2536211fae0b93d771f270647fa3ea8d52c3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVMN1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0a5e3a014855373cf43b2970df1773cac62f2f99d3858c810c45e09edc5337. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BXVMN1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1738085098edfa18c4595b36b62aa7c43096b3a3843b98a3c1a7ca88a2f2ce. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BXVMN1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2ebd4f698513ccc8655f8bf48caccc71ccf3b1eb123733dbb11e50acd754cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVMN1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3755a6c0552eec605290e82ce30f9fca3ed2c0bcd2bfc8a31b713765d5a140c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVMN1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f98196ed2243aff5b96e348dbab5cf1b281a122f0a7a406737a3b28403deae8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXVMN2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432e9c4dac86f66cff1c4f660f4fb1103fbc81c990729add753911022f583e05. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BXVMN2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fefef9b1efda7dbc60365846942f5267a6cb26428a982a0344984cb17b4e7db. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BXVMN2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fb8e064c7b297b796936eebcd827ff368dcd79290fb4fb7178c7038b31c4bd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BXVMN2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbefb626461218e75cbd30c7764ffebfa8ae3e1020bd2b8139b39907d159c227. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXVMN2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc907c8d350aa4c0e5264dc00526ef0184f5eff6530f0532eb9b70b8d7e03545. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVMN2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e38b1dcb82601012284e723e69c676008ed87041dd01227ed04dd80a53b7c6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXVMN2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ff09db841d9c6dbd0b8c74fdb7a501da1b4c5b16302e5e3ff6c0082cd2016e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BXVMN2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d3f2be43fd44fac8a421bb8ad0abdac3a7f0328bee23337fb010d92d05e823. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXVMN2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfb065d0648bad7e7ed35fbb423dcd4cd90462be02b62bb30be831b3c40b5dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVMN2300007.