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 0xc8591d025f0aa5374307d3ab07be8a07f469dee81ab50e575c5b9f2b29ce9142. 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/1bbfda64-f67d-4aad-8790-6eb7d0f5cb78.json and https://artists.proofprofile.net/proofs/artist/1bbfda64-f67d-4aad-8790-6eb7d0f5cb78.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 0x71cc5e94fb3b01268e1bdf421318ae728c8d7e0db972dd79c22d5c6a5c2e622f. 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/QZ5AB2117252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924ffa719664927d903870d2474b0fc1f494cf441568dcd0be78dd0d4a9a8cbf. 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/QZHN42005369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d94dbffac7ffe5e5f058d5bcea79ee5f55727f175796fadcd5095b0287d025. 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/US7VG2437550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f9230d4bfc575c9b2c9c0b3699f12e7772034ed1d6fc752cacecef2d8b7679. 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/QZ5AB2483224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c66e8157211d79f1c0d46390f37447b0f1b32f5b7546a18e46687e5cf8bc4. 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/QZGLS2340379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb966066df70f89e2acc5eda64481ad3531cf6f79d4fe9d38be5f008774bb78b9. 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/QZW9L2201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2019b6a0a6dea18d9458a603556f8441cd64ea019505600fd35ee8e356d9e722. 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/QZMZ92377155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e162a37b6b5a986b02e73e48a429cb105961c3a074055eb3057b038f931f829. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJZ2483224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c74c5ed0f63d7656c56b04198562cb0e697375252085f63b5126b45f0e7471. 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/QZNJV2431500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f9230d4bfc575c9b2c9c0b3699f12e7772034ed1d6fc752cacecef2d8b7679. 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/QZ5AB2483224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c66e8157211d79f1c0d46390f37447b0f1b32f5b7546a18e46687e5cf8bc4. 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/QZGLS2340379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb966066df70f89e2acc5eda64481ad3531cf6f79d4fe9d38be5f008774bb78b9. 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/QZW9L2201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41086b3b25a58860d4fff7ed65287b4555dadd779f0b721c9acdef20e98f9490. 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/QZ2J21505264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00467289698b72f1c80070a31ca55be80adb2fdc925b47a4bfc3cb43f9f7108. 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/USCGH2159886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86213e5cd3e6be4792b5417279bbe385c5d9680aa9c41c43a2519a5c22d54333. 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/USHM92163107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b40f92514df22b7959af837f6595ead3d173ae2169cb0b6922e878506234163. 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/QZ2J21505492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4fac557d42f60f46b2daca0d9fbd37169d97b0d44a0a55d3dec0dafb118a08. 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/USHM22157257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d49bbd781fafe42eac0477a500e6d515e39c5924aab4c6b0dd51f614461e14d. 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/TCAEL1909288.