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 0xefd63694e80bc72b02b382a4e5a412d8972d24375567406b2dfe8c86a0374835. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11b5c0bd-c745-4578-84b8-2908ce48768c.json and https://artists.proofprofile.net/proofs/artist/11b5c0bd-c745-4578-84b8-2908ce48768c.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 0xc31799cda35e7340ae1db538d402ce4797874f29bc583eb91cc800abe0f5b1de. 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/CA5KR2399583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453705811b9738e9fe0dd2166a439e71e83265a8d0500ac208bdfbde190c20f5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CA5KR2399584.
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 0x10498878a3731ce3eb9b2720105dd3a49d5e93d35041c63e5e1d703a3bcd1941. 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/QZWDE2399816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5ced9792e298d8c63a055fad948b771545149310a6c4ff742adc7b00e253d4. 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/QZWDE2399827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe13c7da47b506ec8164f11cacf876acbebc53fcf36e12847089d42adda0b40a. 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/QZWDE2399863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6239439999c40e460d742fb67895809421e77db073dd6ac3ee627eab618706fb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZWDE2399817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3a632295b993f363a9c7995971338fbc88b3b60338d27e4f85b2fa27a63c79. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZWDE2399818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65942199c24784c1115c8c0c427707017274558a2d9e1d71541f53b3803b2f12. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZWDE2399820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ee9faff338ba1f244638a9b70cf264ea49b43265d4893cc510089fd1a9f4f7. 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/QMFMG1438534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87440d10b8aa8db186bfad6f5e538b1a700ffe3d58b3fa1e0cdb10aaef6dcfd. 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/QMFMG1438535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41475aa2194f562060dffe9d4731bfbb41169ca2f9f1ac76b7c53b231f88465d. 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/QMFMG1438536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4defb00cc4db7380228ce828b00e4eefa57f2c4e0c6ca9326e28b30a18afd9d. 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/QMFMG1438537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624014642f47e961c9443aa34c5e45d8db304192bb29b81941ee7ad0e2fefc30. 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/QMFMG1438538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2cd8fd073957199f4ce86651622a6b92df41f0ca6205eb987315f04ff4b459. 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/QMFMG1438539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb4f1b912889727127d93d4175bd84d545280d59cbe55ee1d0fae3a3e22b50a. 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/QMFMG1438540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf693555fc303c7ee457ae2ed33de2f8515b11f49c2fa871e7c38fecf4fb7e6a7. 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/QMFMG1438541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8a076d78f19b0e7904e4ae501683b85453ae8ad2d12e42d3c1746b225cd6e. 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/QMFMG1438542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2156e62fc4bd70399fcbc432fc085a0b532a1b386ff7875221c52d3bd4f6c95b. 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/QMFMG1438543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02028efb24fd0dbb1b0724511b83121f8ead596fd5a1ee5e3cbeb11b92922c1c. 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/GX53U2358332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2901217c5191d0a34b5e8a03ed90fc87e41cd700f11b2dd74d89ed2c981a8e9f. 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/GX53U2358333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8d37fc5b14637ae48b3c1cb95bee52776bc592498fcc373e75b1ab50b56400. 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/GX53U2358334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da29acdc6c458d4fefbf07ca4a436f65c907976544497da75209566f32f484a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GX53U2358335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfe969e3daf702964dcffa1aecb34bc4b163dd4e141987354d298d8d610a497. 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/ARQIW2409405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53658df9738e81c42684bdbd298456009dbef08791664443623cfd55814095a. 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/ARQIW2408542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164510e7b09c52f5e0aee206d79da9e569330a89223f877dac3aec375e4d2cf0. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/ARQIW2408540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2681716d2d9c49c97a92a97a7c2a3a83a64ec4df7564667c022de6ae878b4e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ARQIW2408541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe316aac10a58f3b76838dd53a1385de65c7a364a38faae8f2b8340291f8c36b5. 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/UKXN22417723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5603ab4bda0c2ccf09ba41ca06b62fc2e2c332122f7689802a20f01df79f2c4. 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/GX3Q92432473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e21879194d54b7ecf10a11b56dec7a96f715bf9cdc248af02c0864925f89e. 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/GX3Q92407846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83de5ec897fa16ae8c03d3c5a72bf97e4cc1b159b6b9436294e91c3520cffed3. 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/GBLFP2460473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b986dbe4b7ea1041171038377ccf0f56db1ce0ee94f347e4ce3eac30643e86d. 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/SE6QE2407179.