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 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 0xa94036dcbff9757ec2bc2ef7f10eaecdae65b0e8eef69e4555cc136c530c7d0f. 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/d6bc0ef9-f0dc-49fb-b8e9-7f1832bb822f.json and https://artists.proofprofile.net/proofs/artist/d6bc0ef9-f0dc-49fb-b8e9-7f1832bb822f.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 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 0x37eb866a61fb32fdc325bd39a0510d37b4cb012df7c1c86182f60e6dde8a411e. 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/BCSOR2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40261261ec31acc9815050a056f69e3a0388e2e190a702f01401bcc0fa4e2c22. 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/BRWMB2301884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d0a5d830912f2bdc57052001f399268961db0fe5c66cf7b1a57cc37ec89bc. 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/BX7P32200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eac5621d2dbea368e51a4b62b28ae80bddfedd947081f790520a2445133cdaf. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BXKG22200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6142b4589010156da106ad588aa37252edc5d9081fd3553d909ec7fc54952da6. 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/BXKG22200938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b3441e1953f64cfe547ce414e7d15846ae5ea668ffad0c94f00e1365dae706. 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/BX7P32300426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b12650cc83ea8adaef20846da64743bcd8b06bdd09e503af11d2977a9fba05. 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/BX7P32200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6866d39542ceac73364f67f2f655d72c7b2d174a6fae6ba340998467b4f3ed71. 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/BX7P32300631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf382e9700537be0c006b9e45c847f489c6bba3ea8fcf4cc051606bc213b97c8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXKG22301294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fe2848c82e94cf97d1ab6e0cbe64d174f0a539c26649f0b202c37e20049ca6. 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/BX7P32300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf321b27da74d2178899b1fd7fa0b364681fb6298ec14792ea6ffa66931d1d064. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BCV112200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f78ef0d3562f44f6d6ad88e447c4f394eef9a2e74c39f228a623ef741319000. 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/BXKG22400877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aef641789f2bc714c9eb0415db4df1cde714141b9fac18a31b1525f1bac6bb5. 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/BCV112200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e05aed460545fc5f096dfa9e3263c8d56cdefa4bf61d4850f81c24f28b94486. 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/BCSOR2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83212fdec6608e1c4cb62dcc33d9200f7f3bbb27dbd32ecd3fbdceb7ea343d13. 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/BX7P32100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08ea8179815015a4cbeb39baec3affc84ea4a6c2db64207c682db15c42c0436. 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/BXKG22301500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccbb0842053e06cc243b44b2cbd1e888f0e3d9dac933f26f4495bec893c9111. 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/BXG6R2300350.