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 0xb7e6440a85bab9f2ca91d584181ad0e24fb27a7bf1f053fc0820e329ce5bc996. 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/69ef43ee-6125-41e7-8674-941a84aa24d7.json and https://artists.proofprofile.net/proofs/artist/69ef43ee-6125-41e7-8674-941a84aa24d7.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 0x57056f966a3372f27df3c39698f3c8aa67a2ea834b0ee32d1710e1864cf804d8. 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/QMFF92000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fe59565a6135058fef8bc7eef978837c47606b86bbaf9f2d5da37d7c2e5103. 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/QZMEQ2479618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc2588df6c67aec8f637fe6b07bbcf3683296db3903d51ccfcddfa6f686dd97. 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/INS182401588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf64d7a2ce5ded03fa1e1bc0089a1ca6f5baabffce97a36101b79d2028310e7. 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/INS182401441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543a2e876aedb1d5cc2c3bc4d474bfa502fd46930f367be3c2f1db41ccbb65b7. 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/INUM72400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367470716f8f00f3338267db3d8373b748221e52757aede798ee44ead78dc669. 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/QMDSE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6718c8f4324c47281ff7843d3be8d5981c65a622f95af9d5f596a8cb891041b7. 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/INS182303543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c7b308aae625b6cfd9f330a93e6ada3628b0aa250c358ee3811bf3223779d0. 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/QZWFG2370514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012b1ece30b014a9198c06b167edd609b99e430baec21ad8fd60af36bb697889. 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/INS182303228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df462e4456620db6e21300859c48aef05c54224ab3708dca549b4982a16d09. 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/DGA092370446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5ae2efcccb83cb5cd960bbcabc0a5101f052e0eae0f0748086630f777315b6. 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/USA2P2346788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74e6c26f76a9a0d37597a58175a48435fbea48cf335104fd07bdd838fdb8170. 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/INUM72301576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d9e7739992b322d57ce980f4acf83ddd77f254df228161bfd85b0ad06e0ca. 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/QZMEQ2377172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fd7eacfa708157ad6e91b6df7e44cd1ac0ab6c5a1348b7fa29929514d3e4d4. 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/QZXLZ2318826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eaaee43377028f7183d2d56aae013e137e6e3c4dd05729009b2396bbf03cf0. 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/INS182300481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb149406d944dda58563f4ab5f1bf0bc4bbabe4af5ad950e4d5d9a3c05a460f7. 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/INS182300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf04989dc097b48db8aa786dea01a386fec83d4f0d16f9d32634efb1fc5871a. 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/TCAGO2236966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70907fcfd57c64c981b977f7578d3189f28d7d73d4cc22fa610cdd26e74dddd. 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/QMFF92000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e62363d83c3c123a0e4317caf5f32000d9198736a4891131308e729c353bea. 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/QMFF92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa60cfe7412ee5ffe3207340176d7dac9ce540f8723e06f65ad17b23d6ee345. 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/QMFF92000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04612372a59070ce6af44214b9b9de43827d1c468e140b830a7c2abb4d905363. 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/QZK6J2055872.