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 0x26f21eb08bb7c6da7c7bbf861ba4ab2021ba61541e6a247134b047f20f8970c2. 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/8a02b833-d781-457c-9958-517664a1d5f4.json and https://artists.proofprofile.net/proofs/artist/8a02b833-d781-457c-9958-517664a1d5f4.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 0xe0b690dfd9b5f65f4e983d942ae49b185905634cdaba38f72669fd69735ab530. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/INN242102463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86510f2383e7232b30eddaff4f19bc14a464541c6a659dfb1c161e5093bc5ff. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/INN242102460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a519406a2b60f31391644d3a0b203229ca839a996856c788aef820fe0033da. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/INN242102461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b690dfd9b5f65f4e983d942ae49b185905634cdaba38f72669fd69735ab530. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/INN242102463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6b6daa24f254fd6453eeb227d21710458a87156d9b911f50b38d00a5e18ed0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INJ582200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3075743c8e9167bc01d68b52f6976575f95672dbcdd5960bd6e0103c12c79dd. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/INN242207025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3075743c8e9167bc01d68b52f6976575f95672dbcdd5960bd6e0103c12c79dd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/INN242207025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90479448c5c88bd5a3b1198a343dfb3dc966df9b03f6db0a20eae08924f64e0d. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/INN242208894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90479448c5c88bd5a3b1198a343dfb3dc966df9b03f6db0a20eae08924f64e0d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/INN242208894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62390b283142e4663528b99456b935a87341c35fae6e251d2e06b3d2edf8e8ab. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/INN242315318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a104d5014b374215a4feed8f9449bfbeb5da66b63f22b08e6d3e105f5fe0a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INJ582200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530feadbf31434e318c5e1f9bbd040fb1489875512e9d487d5b73e1a8b7702a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INJ582200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dc904a65a12abe9cd8ef8167903409493f584d1813a71b699cfe0d4b6272e2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/INJ582200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382812189300d95cc1b62d9d9581784b1a256ac355e4d9b23b3ddf493d265e38. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INJ582200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8edd7fae3d11079a071a54e6636831b2ec363e490fe65b7e11fd4f64efb16f2. 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/INJ582200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c37e893d329b0bf8aa10e3e760126e6be6c4d98a934047e3fd58ab7b50634e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/INJ582200644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff5e334445da3cf6a3dc9b8dff6475b51fb7c1b1640a7f2be894fa8c1ddf835. 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/INJ582200658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd4cb7b1575e899b9076b6312c8a510b727cd6067141b0a8e492465ddb20ddc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/INV672500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe7c2c9c1c1ff19dbf3750abd8a5f9e64cf2ed7c0a8e33bfb9be0abd6a69e40. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR96X2533256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268c8494d377bf79f3d654f36ae3a926be574bfa5075da6e263cd99716d1432c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/INJ582200740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea1348e628ab4c88439d876615a6786049a24db14446e231e4bb7286d8a9bb2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX762512770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf3e9f4f8d312820239976d048359c99c7f05b2c84bbb9efdd1a05b7634fcfc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/INJ582200795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5ac827bc32418424062ecfc25247dbc81eba8a02fd2191c613588957148ffb. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DGA052565116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc232c45459a199855514f5b346bf16c2529647ceda64cc776ba6c1cbcac54caa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA062530975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd552756be533405329f99e943908e8280b590b3d19aa316cbd28c4b8799e1812. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/INJ582200853.