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 0x17a14ab885a099575b290104efd656058dd418f088c5ce54cef1883bebfcec8e. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9125d03-4c30-492f-911f-e7d23a587f50.json and https://artists.proofprofile.net/proofs/artist/b9125d03-4c30-492f-911f-e7d23a587f50.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 0xe0a6c5d5434c633b357d9dcc107ee3682b21c4f4bd5734f550e2f29c8288d944. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEBZ71800447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa700f56a54ea08905972b4399082afdee7f8c45def68bd41b3edb15c0bb03034. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEBZ71800448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498553a0776f2c3dbc07ad017f0a2f2261b43d9b4bf55f948664f2c93a83b4e. 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/DEBZ71800449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c01bcf1fdd81dfe726b7d474f082a1f7fb39824d81485ac4b82c07a5ba840c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEBZ71800450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c212ec7c5120ce8525af9051eafe91702a7290c7ea65353f8859834548b6a7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEBZ71800451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1c54f87966d218f3b95ccc1df1405d3435dea3c1a04af88e278bb6787ee687. 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/DEBZ71800453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec00c3cc94d3afea674a4301ef7c5d224e93d9882a53c4db6a40dc61d501cd99. 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/DEBZ71800454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e1a18f16b2df30deaeaed98a657c6d3f99f86693fb04ac2727496b09183435. 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/DEBZ71800455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf64c5e63cf95f0924ef8a6b59de454c0399794f8062ecb6cfb197665f276eb9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEBZ71800452.
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 0x8f02df652a115cc799ac2250d397a7d08df71ca8dbfda20bffbecdf19f83ae2f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEBZ71800456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb45eb9d8a3d110d50e9f2b5c3c4e4f8c58110c745cd4da26c2559e0eec92880. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:40:49Z), 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/ATN261504602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3d91bf1e95deae1faae5cec18ad63a2a10f98fe8c21eda3d5c63aedc4ece91. 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/ATN261504604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4339b44df142515ed6e65c88cfb3942057e45e71f80f119017c656765dcedefa. 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/ATN261504607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22430f7538dea701c50f2a974d10d6c8292571adcc5b943e674f79e6fe181ceb. 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/ATN261504608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc865feb3c371b77a692f7abc93a20488513f46d8d9d7c5a6c2fc4db14a8730bd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ATN261504601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc338607565837c80ed0dc28e501fbf6c86b666ed21c214fb350478f298dee239. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ATN261504603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4df09c6632e8c621807187860894da8565e87c60711ffde517b52dcf712003. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ATN261504605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1842bc3504d92338fcdf7970263a46b2aac086b2e4dd0a830fcb49f79c18d900. 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/ATN261504606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd003a2c527d2bf7b0ebb084df9196d2a725ab01f325874d39430a2b33e584008. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ATN261504609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996945b2eff0d8089f285053fe7be0b108cb4efd35323fc4aed164fd5739830f. 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/ATN261504610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff70aded215d17ca76f9f7a0d909649477c54f69f4f42c7ab11a477709e68ab. 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/ATN261303606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532ce8cb44f9f7126acd8e919b0fd0d122b43c75eeddfe3e0baeddfd3f3ba1e6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ATN261303607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6329a5c965482bdc69276844858754df7e981087309f5fc886c12874a7841a14. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATN261303608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6380fe7837b998a8beaf7130e2c21fd1e3c2deda10e042fe233cd8e29feecc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATN261303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef3be5d373f3edd56d34f685f56ebdc83fb79fbbdff3eb19ed085019b9ae2cc. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ATN261303602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb015c39c579bebb522d16c1b2ebb8e862128622bebe335986eeabca137b47e5d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ATN261303603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf34b31a5f796e904ce1a9908d3f71b6aefa379551b0d0e231e1fd6ce49bd7f0. 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/ATN261303604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65aece188e2379ea00c7fdfa74e0eeb5306824f7b1379afda6b9d8be56edd60. 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/DEBZ72200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296869fdb0c7139b3b2ff7782236d4dc8085cf4d9784e6096df3d3713a5aecf0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEBZ72000362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c251470e11037675b9e3e29c78f9794d81daf7c2ce102aa08cacad784834dfd. 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/DEBZ71800442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98184f8bb7d07197463dfcaf8593ec84009d3713abb8e8869bedec1cbb7c542. 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/FIRAN1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcb84211b07b9a9973a388dc2a897e459016824a727e408a0027fe549952b82. 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/DEBZ71800331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ec177917e51a7f830d7202a08c59da30eece644fc9e838d9a93d7e99ba349. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIRAN1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08234905c37fa93ea289c9eda4a8cd09bce7bbdd2863db327da4fe8333f39cb4. 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/UK53M1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9deee8c91407f222e79a522d5cf71eb6c17ef6c0e50759e90c00b654022ab20. 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/DEBZ71700235.