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 0x0023ee8f621c905d959d45a7db3b2a2e1dcc034f28373f3a2b63f8b07e0942b4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f06a520-3a57-4dbb-8ff7-ac59427b5f51.json and https://artists.proofprofile.net/proofs/artist/5f06a520-3a57-4dbb-8ff7-ac59427b5f51.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 0x01938e6e0ed3b2c3045d52bc48122e55068e0805799abcf691447cf6be2dde94. 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/QZPLR2431073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e71da491b9bf9c588a1bc878d947d9da05946e1e074669214ee86021ac602c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZNWR2388396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23457b4966a7d1e435efb6c9abe7600ee3f9e0beef627ceeaf2d401e096e242a. 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/QZHN72222434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d2af0674e5f303966fa60f10e14b33c9cdcb33417e22767062dd3d1d865a5d. 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/QZHNA2444151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211fac1c77e55b053d7cda7b579e8fe90225ef9354b888bd11aaa0790d87cb7e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN42383192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583e45c49fb9c60a95a20bbf953c0e92147c1e5d80ffb4eff176c2977832ffbf. 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/QZDA82303890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2022b372fcd44399199974518daf79aaa9f3292fd1f869e6ba8c843520150a0. 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/QZTB92282275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b05129d308d945bce58c2fec68c3b6b7652647e9aad17cbb8e6e157bfed298f. 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/QZK6J2204908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee1d1571d972e56ec9756c35f6046bb05d70d18ee58194a564ab147efc2984e. 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/QZES52286338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d4a504504a22729b5da9b6b33842fcfb3b6d714bef18a7c633bbebe3e17da2. 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/QZFYX2230592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da8a8ca17d46e82b1fda07ca0a0403cccd5ccfdf1c94a8a0b8f2d802a2f2118. 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/QZNWX2185439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bbcabeab15de7a47d4a1dd1a0b9f898fa87b11ae012ba440ff434f3c661bf4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWU2183236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c7e46eec88186eebda5de989282a8f03e33a3ddce87665e9c8c036792ec7a4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM92148659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0857f1c8d07f751fbc819fad538d9ca413added534751a3bda276edbcce3bd61. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2186736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd6be1e0cb329ba5e67a5b8c9f611924cb4ae8a3dcfae3555cc43e6e382aeb5. 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/QZHN82100414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71305bcbf67a2fb784f985ec4638af2d8fb07d3c98e10d54419627f025af1dd8. 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/QZHN32149982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ade92684302eec699db4abbe440b28a350faa2402f88bddb9696382dc4089e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ62133297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001ecac1bf4f16b63b91da97f1d21e8740e28258a02b99914e0abf5ac902aba5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ52137978.