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 0x047685acacdce3e315bd9e85cba42c5addda8425ba750ed4239b674762169e12. 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/1ef67301-7e59-4a54-9b57-18c33b45bb3c.json and https://artists.proofprofile.net/proofs/artist/1ef67301-7e59-4a54-9b57-18c33b45bb3c.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 0xf2c6cd04f12722a8e8f3d5a3e74f11917220beb91d19ea962f809976e6e32ae8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA72479120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fb704a85f1d6ee4c7a4997ff5a39720dd3c2d92442909ff5bb40b624056254. 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/QMFME2433909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b14894e2b4276625baa74d8bc3e2a823231cfc3d5f2be21a52044a3b8420b7. 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/QMFME2433910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c6cd04f12722a8e8f3d5a3e74f11917220beb91d19ea962f809976e6e32ae8. 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/QMDA72479120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c13cb9ed8446dce6a41f02d353ea48fd0a65251f7d4d0c2c870552624c87b4. 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/QMFME2433912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa43c3c2253f4f2332b9defb9950a249aa45219d6067e31bf97ebe4649e149a. 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/QMFME2433913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36800d7e5b1ef630a7ef49774cfdee19bed578bc978d2df3eaac7ae5fe2068d6. 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/QMFME2433914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0819fa8a0cddc2ed343b2b47eb76e4714cf01569f07b3683f6871cc2d41ea96d. 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/QMFME2433915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6442f6c986fa9dbb20002f621aeb491340b374470630733cca318310900a2b31. 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/QMFME2433916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2689b204a3a6a258a6596ac8b595e69e7ae4af00fa1159de52361bc1f23db5. 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/QMFME2433917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4901d4ee22bdc81f2afda7d7aee3b3cada5574ae37643513a35a1a1c9641804c. 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/QMFME2433918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572784e848d973e69c5b388be4ba9bb95f51ab55c060528b98848b9eccff00c4. 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/QMFME2433919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324ede286587b8d1ae4348b9c083268e5d1cead1c58c8148d7e78bb8cb8bd5a9. 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/QMFME2433920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3442562c5e019420be32f4ce12f7aae1fca19d53ed8f18e60b96e5145a8bd66d. 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/QMFME2433921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61339d115018b7f3fefbbae3d0777f0e8e8127d7b361a18d90e32e1168191244. 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/QMFME2433922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7ac6ea27089f4f74cc4d8c8abe62bdfbbe1a060d28cc4b4936f55b35e0d794. 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/QMFME2433923.