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 0x3239536357b53210f65dbaefebdd6423f3cb8655055e2f0814b288bf9a037559. 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/2a38e9c8-628d-4c1e-bd93-f5ac92b657a7.json and https://artists.proofprofile.net/proofs/artist/2a38e9c8-628d-4c1e-bd93-f5ac92b657a7.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 0x4584616c8a89e45810e4facb9d5c928a69c85c7fec70973e57572377182fd886. 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/GBLFP2144944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f1a5b98e325450faea470cc3cd977c69d88bc6ed05d88059c32ef82e535392. 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/GBLFP2144946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff67a90e78a61b7329eb088893e3394c02a8ea8a09af969c8f1d664b9e86488c. 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/GBLFP2144949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc8c718dca7283f27516cf2ab71537dd2315b221c1456f43e7cdfa59b15df6a. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/GBLFP2144950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f918cd7cafcf3d20d7061513d53bb535fc9b1d575d49899c4519e07fb5bfed9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:49Z), 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/GBLFP2144942.
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 0x6fc6743a1f68a93779914fb8e999622751e1fedc80fe2788cff4c14394a061ea. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBLFP2144945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db7758697c45535cc65cfe109460e1f2fcc3a7d8769c4a928434cdf3e2646d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBLFP2144954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1357ce882f0ee8ab1b7996dc0378887a4b929cb362b53f09f8fdb9e25c1d024c. 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/GX53U2428134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4160c9555190f938669cfef159c4f615d4c9839dae9bf4c5bf6ac8a5a46ad22d. 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/GBMA22302365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b76ecf4b51f77a4b78a179dc62c38615cdc0d16655b7933c17682a2fc84e65. 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/UKXN22328130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9f695474ed8e6fe47c7e636778f3e9fe1d395a4759711b8fc5e38d5754e26e. 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/GBLFP2310984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefe4329b16e3eabc365eaf7499f62118626c3aff38bea0048b048bcf8e31079. 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/GX3Q92338313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcbf7810bb30bf7c52fae35579eba3a9809f641ee35eaa656e739b9ccf55616. 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/GX3Q92326080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822922c6938c40d06d29262e6722155fe4dd3481d7e6b8cb7fb9e49854a68a32. 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/QZK6L2269201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61bcb2bce46a36c6906bd1094b3e24da4a782ff54285fe0870b5d3cf995985. 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/UKXN22246898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dbfbe97d27d9e7b24fcd3c7bc202aa6a1b1df5d76e0d44abbf5bbcdfcbc0dc. 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/GBLFP2211517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60872ba34cd25349463a1be7f7462aa67ac837bc66589315a063c29359d78d43. 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/GBLFP2023393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00340f35d82f9c7ac9be6955b52a67bb78d7415ea0ff355895f03bd178a5306. 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/GBLFP1929476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f5d7d1b2481e5cb0b3bef5b65e86f01d95d8c0a35fe6b3b9b0e9151707c69d. 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/GBLFP1872355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e493f4ead7eabaaf8ce1a2d94bc0b49b19b7bb4e9cf2fdac9a364087bb63434. 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/USUYG1310578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37acb697e89432fad39b6f9a99825025de1eefdf5e5fd15dc685122ed173125b. 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/USUYG1310583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09329d34dcb15fed04cc6b54f4acf00c25a3cabe130257254742d47fef9ae4a8. 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/USUYG1310585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb0dfd94a93b8d578b1a35372354b237418bb3d7c443176d9f664e91759429c. 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/USUYG1310586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af99bb7116eb572f9f95acc6a6d7cbde43f092c80938c4372a2281fdb4f6439. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USUYG1310591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98e63caf72e3687d8d7de1865cbf15a168ae07be8cfc457320f8d2af3339ed8. 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/USUYG1310616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e938a6ad9676667d4bba923c6600472736c96a3c2b858d5305d50ea4bd19a5. 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/SE6XY2149935.