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 0x66898e0672910af129c8b702b1011441712ded918ad12698006dcfbde06de554. 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/1d11b9a0-46c0-47b7-afdb-17c7878c5384.json and https://artists.proofprofile.net/proofs/artist/1d11b9a0-46c0-47b7-afdb-17c7878c5384.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 0x86343e5ba793a521c38e02c6b77a6d397d6c676ce56170a6bd68d13b7cfceb10. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZTBE2385729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023f0b54573d09de6feeb614497154e7f8e7c39ef167f9c87b88b609193fcb7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTBE2385731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bca49f4f8261502a5a59bb9633e54f3e2ed267e082ce8699ee331f500edc7ca. 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/QZTBE2385736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c134ae20ab45959b1cc7e4c648467fea0bd1ef7a321c23bdd94de6df0e8361. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6H2583895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc48e06b8e91156c63534fecff9c68f8735602ff40c1e58f6b064ed47c2cb34e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZK6H2583899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f91d1525e95cb41676ab72cb268a687d7cea28dcbbeb7cba11868872d7e6d02. 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/QZK6H2583900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0398f3a6e8dd8239eda424a677430fa65d3b483aedd2c8a06bf768b4ade7a840. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZK6H2583901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5594514b0c9b67bf43a4587cebd6edfb883b6420f2bffcdc0c987ea91eb38697. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZK6H2583902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f56abce2d49cba97b476adf926303847e211e3e18c6cd7bc723ccc94472d5c9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6H2583903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebc60399a72b9c8755cb0ad81a126c569dfc3a0ffa1513257e89c3409ced332. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2583904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8668b4e868ee848a1b5153054614c9f4ec3960e5cbc8c27ba7829ce786e0cd. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZK6H2583907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d784a4309a6ea2f521497f3439e7ab5fa7e4df951f40481c3cccad5db43979. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZHN72422803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68440f43fc651e2862cc778083eff49508ad2c0e53db854bac04385164de42be. 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/QZK6H2583909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b894874f9f2c27724f99aead3b0478c3ae7128510aafcec1540115875f54cf2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6H2583911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d76d450327cf5574fbd75449ec387f859bc34d3c84164ba991dc1d8720ea7dc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2583912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd758f0be8c2db04549fb392112583f0a2339fa054db4c58206ab27f264942be4. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6H2583915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8afbb6dfd90f9759239a8d3ab147b4a0272ecbf11a8cd792a0f22a5daa03ce. 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/QZK6H2583916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde877398b9dca2c1371c1716610a6d1ed1708f3f036be4b743ed3f279bc93b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6H2583918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4249f28ece0c074626eaee10fe8bddc79ccf38559701b19807f365b499ba0aae. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZK6H2583920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563c8a34120cb2e42536d42dba6d2cadf3c54c10e5edc346112270a1ae4cbe95. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2583921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673d59ddd47defe2d20ab851250e8a03c7b26c79eef2391846ba4148d784a88b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6H2583922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2278d21ac6a1bb793fe3af5719d76f2a113b48c2618f041923200700786bd2. 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/QZK6H2583924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ede1e41805e50c517666d15f2128a0b53548ab63100afdecab605352722f7cc. 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/QZK6H2583925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867e97a155e24a26dcf33f6b4883dd20e2c8cdda7758be0aec0f4d8644335a45. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZK6H2583926.