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 0xe25f9c84f36aaad26cbd79e817fd4cf328d3e9ca939b2e5d6df9777461de2d42. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85c910cd-2f23-4dbe-aad8-42cf73d2618f.json and https://artists.proofprofile.net/proofs/artist/85c910cd-2f23-4dbe-aad8-42cf73d2618f.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 0x23808d9ce8fd5d0c173519a299580a8c64394c9c2eb5ed2840b4a8e2c6b0fe9d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:33:44Z), 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/QZES52099758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd09665619b3b112830adadd0e46da4192b421edf780989390e28c88ae04686f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWS2055911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4524ff9ba149b6213e8afe937a7033c972386f7cefe2c621208917b2b0de456e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZDA62101390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4524ff9ba149b6213e8afe937a7033c972386f7cefe2c621208917b2b0de456e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZDA62101390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c18c1912dd1005803aacf2bcb7bb6fad25350b9be5ced820053785a70a6454. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNWY2134331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1810a1af8503d75a08cb1930b15bbc89c8e332134a34c5e845d1c5b898c12084. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:03Z), 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/QZPLS2106286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4203e1d1fc0d511f933b4dbe1478af477f6f2337ca685b1dd560c2082783f0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN92290489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5645d4d703eb911d6c0ab22b19bb4b12e1e9405c5fcd466fcdae1ef4ef9bab30. 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/QZK6P2228360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92680aaadbf2b8cbc59811af44a3fad2d067b497472e554d3ce11ccfcb153e5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX5MY2277150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243d681f90dca80857ee998799887a3ad1390586fcbf0e701cff8feac38d5b04. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:14Z), 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/QZRP52226404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd467d58a77147c3eda71ab5f66a19cd737cfbbd9fbdba5db38f88f7210a3fe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:04:33Z), 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/QZTB62235837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5895745a96d5bb9b43a3607b7be502708d51f7e70e95e9948ca90a8ca2d7dbe. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:16Z), 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/QZFYX2334981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821258153f1f2096a6a40146a82f2730930f37214bf21f81a9ff563ba4df705a. 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/GX8LD2342548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fffb1869cf6b81d99d432a493cd57f15066ebf7b65020e23117a7a84fb10294. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:46:57Z), 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/ROROT2304510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb969711423030f49bb4ad8df142590b6483cc7d6b5080d0c4f623ad363cc502. 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/ROROT2402760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f28d0130d411de9a85d8e536ef533e8e8291931b3cb016e55500d423a23e0cb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG2322188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255f7820f3f20852a7cbaa857220fc2236e0d428e026a04a1a1f0af2a8f86e9. 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/NLT2H2300049.