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 0x6a56fb52f4c22f7ff069a670bc5ac97319be4e20e9e87e671a3220af77bdc038. 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/5eb69a06-9307-414a-ab08-7782b0237f56.json and https://artists.proofprofile.net/proofs/artist/5eb69a06-9307-414a-ab08-7782b0237f56.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 0x7146281f52cac3ea68ecaa9614d8b7b5136ebfacbff893c18ae3b71f22bb83c1. 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/BCBBK2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3f30b10d28c215da75eca5f1a4589122d6cb969c0cbdc6f6cc28d9b2550471. 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/BCBBK2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e28c5788f653a22d9f2732abffba4c9db0784551ac3c3ec6a20c9d1cdfabd. 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/QZHZ41958955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd3d2ec652929de6cb37bedb55271866a2c889eaa00a58e98d27b013fee0f7a. 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/QZHZ51902896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d5794c85b6f3a093f58fd322eb9c52587d1a81973ee60d59b9e7f763e12ba7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZGLS2104134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd7bd486103b5173da06ad0c6fa23c19f83486abf07f4e7e60af66144996732. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:50Z), 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/QZGLS2104133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296387fda87c7dc9afde799e0b18dfef3af4297aa8be116262134f48432e0eb. 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/US7VG2198856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1945888ad8dec177078cbdf3fef23ba0c9abd66998d9a6397c8f6e2a37790c9e. 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/BCBBK2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcfa3672813ec09f69aa3a36dfa5c3a2fa9de057532305bff4d0cf252f034ab. 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/BCBBK2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd623889a15e8938745e4b4cdcbfeeb60c3f7a0abba8c5f29895b58cde33faedc. 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/US7VG2042511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfab19d8dd732cfd9766557994422be51363be514907bee329616b42062cee31. 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/US7VG2023714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70efb2d6edf4be7dde4d416b478279d3b575b949fa371896ab79cbf3438b123. 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/QZHZ51966257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21b2557a27f89bbff79713c01048d864529934fdc77656ac57a244f5df2d135. 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/QZHZ51941720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2e9b1fcc89872f9c6ed6e942201f5a0d63b01675c3869e9ad8eb6e290040db. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKCT82400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43797a2211f60b250c93a11f33627a1c67cabb89cbb89ab95f8249f720c37f52. 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/BCBBK2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0461903363295801d780836b5a41bef1ff315567f32c47e6576d1c06904587db. 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/BCBBK2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2291ae0192e2b92b72da3c09f7b59ed50de82e99bd0d21e20af1e5455ad612. 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/BCBBK2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e1e13e8216eaa749f23c43642de88a0e9e48e2b3a992d9f8cfa24d201cc1b6. 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/QZW9L2464692.