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 0xcff7ee871ebcf00b6d1bb9e49e9f4505a25bf02a1c7c6a2d964a1c95fd211025. 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/f2238c14-ca30-47f7-accb-0f31fbf1feac.json and https://artists.proofprofile.net/proofs/artist/f2238c14-ca30-47f7-accb-0f31fbf1feac.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 0x37db605138ef83795e5d567b15510a98028454709d1f0c3a1a185756687ee33d. 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/GBKQU2416714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0f49c00defea8f72fe94ddcac54ada4233d41142848bcf09808754d5ab1deb. 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/GBKQU2416712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76636392423b20422b8cb6d3693efc2a30b4b64de82ba9c4a3466b219a15ee2f. 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/GBKQU2416713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371abe6dc3a8cdb15fa20de20fb02a62c9dd4a348172425a379c17d468719a97. 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/GBKQU2378617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c06e9dcba0e4d5eb2a8b9d9a9c29f5f240b005cafd11597c0e0cf4d39fb5aff. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBKQU2378618.
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 0xa5cb2fe7d23011ba76b9c005ccc1690fde03b0e7c0e6cb3ad638cfc9fb468f78. 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/GBLV62014291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ab32ba18fa481e7a44086f82467dad2d865d1dcd7baf3e3e24f7c05c9d7644. 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/GBLV62014292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19629314ba6c6b1bb594f9cfb284e12b2641050d89011a118b01c6b4fe861862. 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/GBKQU2011816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be2767865343754512f31cb3a8774afe43f21e539994a7508f7dcf328725e1. 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/GBKQU2011817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954f0adf11cbf8f1e24f46178928bc907713850f8a204ff42f2b2e82d6a108ba. 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/GBLV61926772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a28dd85aa509d79e348ebd17698aeb7f1d8529ccd0bd9519be162b37b7f24ec. 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/GBLV61926773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6e23203aa8d36b6d6c1aecbf5cf6a77a50a6dae3f33c294856963176865c5b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU1991907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb076bffede98568aadc6d047cab876faf0e6c7ed0185f988856951a51cc126bf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU1991908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbca2df7a561e00c81cf62b69b1264e8f01796beb8252c0138ec55c201c1612f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU1932894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc311dd1ab0204f8516c90b94975161d70fcc09a0844ecf9187a26c2afb814ddc. 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/GBKQU1932895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5bcaa7fc1c526954af54a83ee89de36559a256ad3121adcedbe553c871d9c2. 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/GBKQU1926151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f0b258ed4b8226c88f9cd37059d20cb9a044d3f1ed8c9042bd370a863ac62d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBKQU1926150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fff0d796908d6bde1d767c9567631488a5becedf9985f67e5460b9c8ffcd31. 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/GBKQU1914290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fc575bcada2db0bc43e217cc01290e6d918b54a814c6a82e9303178609319e. 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/GBKQU1914291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb70ad3953d4b709977b8fd137a42808f87a083360eee7794588113ec70bfebf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLV61816384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3153d55b0794967d7fb76a1a61b7d413382a2851065e90d71d47c3d6843e5412. 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/GBLV61816383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95daeaed9c5fc6efcfcb260e0d93db1069e387dcd4f3bfc1869b88aedf4c65cc. 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/GBLV61804072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f772290952c7f1682263921b32c332b7da3020d6c250d9e7edc4c1e03205a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBLV61804073.