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 0x05bb6df053f4d49518f13a1f806d4842c2ec179f42293a5599cc626724039886. 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/fac7f44c-4c89-4baa-9fd6-f4a17f4c4eaf.json and https://artists.proofprofile.net/proofs/artist/fac7f44c-4c89-4baa-9fd6-f4a17f4c4eaf.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 0xdfc26e7dd8b08a73f7b86def09a3b936d0969ba0e1a81067bf024597376ca672. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA62148074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022ce4806f642bd4d8d0a2f7992f4012e953fa80e7cf6fb6a86133fbb7891b75. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWY2182997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ed92ab3140e96fe5e836868e2ab1ae92f280ab609cfd77438d2987d363df3e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN82272684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3e68fa107a028bf6fb47b9038e3bee2affec7d4b0ef6fdc2089c6869c81257. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/MLXXX2205040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7869f04f51b1514b1a14535346b30d1c9fc43eec31c4bb5b6c0ea2907006d49c. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZK6N2299372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421c4725b0bf7d170e0ac874af0865a2220ab61fe1ea6213b1a1850d483eed4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/STVA16778993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa44b1f48428913201a3587bf1c6a96daf9c1bef548889dd3061ef874c0f0959. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWR2294881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe92b12817414efaf29ec72d579cf28a6030bbf4616757e433a58c5f18d83cd. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZTAZ2269546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2aa6e0af504d1b5ae5fe2e7e0e21c7836129efa26090ca7b3d9a626e224c7a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:14Z), 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/LISTY6924867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075efd6cabf5ecb8cb8c05cd757f2f8660a6b7b052a2e8b6284da216bbf005c5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PSYPA7123078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c7ef1b96df4990cab7416acc2dde28e6e373b5b57ddcf50bbb4185c876c06e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:59:30Z), 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/QZFZ62333620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92835f7edd7e30f84385bffec0a5a9287b3f7e5638afc887ff1b7722bacd9843. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZHNB2322621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d72eac9e25b3be2f06bd9340a781337995e92db704554dbb74a59b9e8ce7522. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:26:00Z), 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/LALA67994564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb86fddb0074c136560f9b82179c2957c20522bc8afbffc88da1c222de9042ac. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6J2389104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d45dcfee75aa23570d55c90bbcb28571d7c8213e4655fe1afc80eaa9e9badf3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:38:51Z), 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/INSV45609574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d06fc034a591a4833ab49103497dc152f5e71e9bd4c7a5a7d7a8064b6d6f09. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB22342768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c6316c1fd5a5b1412b96fd93be7fe4bffac9158a84d5ab305e4dbdcc1efe38. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:23:43Z), 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/QZTBF2310141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e44a282fe9629e0d50f1c4f044a5c2263fb798027050bf20cfd04479d44f2d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZK6M2470627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f291fcf93186e6f15f012de26cc01890ee590f3dc364435ef9d4bdb8a5211c2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEQ2496812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a2938802e2108c5276082f841388f0a54d3cf94e02c0fc6c0100c5d330bc04. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTBE2479656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40ec7df93ec7bf3572b1fe8e87665af742a70a2876b829237a57f6e48ab0bd7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:19:41Z), 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/QZZ782461504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94588405c322c1aaee50bc45719e99c42236d479bd248328179fa89f3018e400. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYX2587978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec0590bb65461aca804a3218d9344d6e372ab069da7d2f591a081999b01045c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZHN52571689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4edd5c6c6d91267234dc24fd97073eaa4c833965bd711eb22fa4f867f39937. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2566692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2936a90c20661dc2e7f081afa290d756734f1380a696d343bd58620b1806c972. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:10:16Z), 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/QZWFQ2516746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d8295b659de2006ee7f587a3b971f617ba7bbd24f6cdf3ef37be104da49fff. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFQ2518790.