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 0xe5c218c0bfb107a861db248ccfc37a0788ca53382a4ed00ed672bcc098cbd2c7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fbd711f-208c-4502-99f4-d820d2d91d74.json and https://artists.proofprofile.net/proofs/artist/7fbd711f-208c-4502-99f4-d820d2d91d74.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 0xe06cc80c29c516d3f40fcd63471b99023dac87a442dd94a337017a9c55710c22. 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/QZTAT2432978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3c80031bcdb41d403d82ddd5afbe37fca6ec18c837ea75ac2ef42a537010c7. 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/QZTAT2432979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c18c11eb81f0a6782a2bb09897c06f9d3d2eae1f305d7de92b9dc4a6f51d8d5. 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/QZTAT2432980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c3f7905fce97bf99ef00092bb5c1626a08b8b9c047cf0c7b279722298c0463. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTAT2432982.
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 0x673aa4d7f2aa987764e8e866595ad316faf1c97591a3626841ea6b5154ca8ea8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZTAT2432987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708b3ce0d910a8d5845cd1228d2fe3669e44fa2b465b049cd0bced08498dea1e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFJ2348885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71aa0c49d019c0f15b836bc31a6fe4e25021c60d81302d3632c6ef4bbcb34754. 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/QZK6Q2399898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6218f51369f9125e871aa1ac4208a7bf6070a59f1d42ca3d4597600ff8dcc7d. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6Q2399895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f2ba8b4ef354ecb58b73403d09fcaf43c6e4c64e95fd44537b15698922222d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZK6Q2399899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ff68d62154793de98fb4a6c0b9bed8ba8a064d3f023eb87a747be67aba7e97. 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/QZMEN2217678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95b68b54c05cacecaad547c86aecac6eb0919f815ef00bd2391093c8ceaa5a5. 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/QZMEN2217682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6ec6f3b8ef39ac051a40f23ef9006854bd58f73a8c95f4be74a80428a0d969. 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/QZMEN2217698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea8d27cd5f1fdcbffad7afd4ed9082917a9c159d0c51f8b5fa0aabeabf8eb32. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZMEN2217696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfc0e0beff2191610ec942672af9cd4c00a46fe64c767a837ae6844ba07fbac. 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/QZHN42456023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4974cfa94c063ea0c5df0c562260e57fafa9b866cb7c3f481b4ad95a2b03a007. 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/QZHN42456026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d88cd4d03c6a59d7b214d68698824e2cfee809f01ded091d899c1ae05940df1. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZHN42456024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ef8d568a7cbaefe8d1fbc3532a4827ee5b70d7d260a3fbf172d2d5a84c4ad9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZHN42456025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7eabf9094998e48dfb95ca61f39d346739b4ebc03bda5b6c936658033db0b3. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZHN42456027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87554ad634e6f6fce545ae1494032f084d67cda19ac6b649e7eca349dd3083c1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN42456028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b64150cfe3d7e4050128b5dd361010a7f834fbd3b68f358b9bad074b49222a. 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/QZMEP2144290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed808fecf55534c7280655e196ffde7a78aa9b22d625a3a2504c860e0990cdf2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZMEP2144291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cd7b1ccc28922e1918c5a0eb40d8465413832bf69f24f93459b18425861221. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZMEP2144293.