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 0x60206896f1deda26ffbfb6b5e8c8b59a18fd6fc9c1af7a29b31197f20b57ba57. 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/ed052d11-da81-4c94-917a-aeb24f143826.json and https://artists.proofprofile.net/proofs/artist/ed052d11-da81-4c94-917a-aeb24f143826.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 0x333e9159b30c06a7be9e3a76a4fdf5fce6f22634a7271b06eb0a2e06dec614a8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BX81V1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc62315a786c060d8019ad2e9a70d3eb863d1e9e6cc727f61010fd982f0114d3. 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/BX81V1900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d943ca32f269dc8e7ba8f3fbe11abccd90634b83723bb03030dd54fddc10e65. 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/BX81V1900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4c536dbbc7985d824b72051277736d2550d64ab79fb85581edb7f4f4a74cc7. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/BX81V1900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b230e2e38078c16e34f2250188a1baa0c6328688f18ed96a181465c361276d6. 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/BX81V1900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723f3abad56235cd282a10630ef52582f476a6cb7d15647174eb130d2698c681. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:34:36Z), 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/BX81V2000497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cab37ccbc11fd700cd5fcbd7206fe5d10770dbaadd6a835898e2334028e3a7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BX81V2000493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df6351c5a2622fe99d6f25ef41cf3b7e8064389ae6aca2e7eab681a216c229e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX81V2000496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3e81e73d0179283f4fc0c0e71838a948506fdf84e2966797831ff77ff7eb6e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BX81V2000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2a205b4247d994912b20684c180b504b1e21ea5b0196b7d59792b349921649. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BX81V2000509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ee119b3dd00a7e6090f6fb2ba679bd8c0aa1c16d614f2a3360f68a73cf952a. 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/BX81V2000515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583da8f36718acba1bd2b45c62303817f388f78329a98cee9c6ba7d8a7a9ff91. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BX81V2000519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc5fc8fed55e1f466c9086b18a8a5e0825088fce8cc96b3b651638c736efb87. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/BX81V2000520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa240924c3091d63452708ac781b8d4735e14096bde4b32e29471de62b1c725b8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:57:27Z), 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/QM3DF2177480.