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 0xd6b7e4b707998c4da627e2ffb6feba8038efbec81da6cfe70f4a1a5aede4f2d2. 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/7693b23e-7ab5-4c06-92a5-13b39ae1795d.json and https://artists.proofprofile.net/proofs/artist/7693b23e-7ab5-4c06-92a5-13b39ae1795d.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 0x08731ed9ce0be1c0469df56b2530c8fa49d3efebebba8234c8ab3e91ec8c23bd. 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/IT2J82100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2fb9cd2955a950578ff8f4c15a18e280d7b10a4c1d029435ceaa870dc8e515. 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/IT2J82100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188ef29e75bc4b00b75e5401b6a7207f9f4f1dd7a7ab4c6a20113af93e50fa71. 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/IT2J82100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a056685e22d608a8a96984766f74fb25198249eda2d1725a7f8bcf9232331. 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/IT2J82100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bce0198fe227b6adc65e0293e9bcf98a48c5e9a3ab7616c1674dc9ec691da1b. 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/IT2J82100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeedd487d0cf03ad36fd3c2eed3eaa4d317e84154d3e1fcb5445a9340296b83b. 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/IT2J82100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e5607baefcc38379cd4a0dad5482925f29504d573b292141999ab290cd821. 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/IT2J82100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d687bef4b7f4ad5c6859d245ca8124f97305f36c1ed1f6e8a5c134f69dfc62. 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/IT2J82100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188ef29e75bc4b00b75e5401b6a7207f9f4f1dd7a7ab4c6a20113af93e50fa71. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/IT2J82100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a056685e22d608a8a96984766f74fb25198249eda2d1725a7f8bcf9232331. 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/IT2J82100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bce0198fe227b6adc65e0293e9bcf98a48c5e9a3ab7616c1674dc9ec691da1b. 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/IT2J82100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e5607baefcc38379cd4a0dad5482925f29504d573b292141999ab290cd821. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IT2J82100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa617d19624ed659eb1d16672e85d39797bf2283dfd81b768511521447688bdb8. 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/NLRD52017989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c612ec3fe32c484fc4998d231065d9b2881da09e7343ac0fd3a49ed080aee68. 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/QZFZ21923482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bd57a9838b6836c6230d8414d02a2b2dc120b6fcc5e347700314e7b1d5628. 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/NLRD52017015.