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 0x0287229822603352a47a7619da60603063fa7b8c97dceb2c42ab11b6f40a5bee. 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/d68a0a97-b04f-49a0-be60-04c7a03bf39b.json and https://artists.proofprofile.net/proofs/artist/d68a0a97-b04f-49a0-be60-04c7a03bf39b.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 0x104961fb95fb182b01feb52ba9dc410d6a895cd57714a17c1da8130a29aaa75c. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TWBP31600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4a1dd4a1ef3bfb77d017fd33e1b32c6098435bfecb48f6079ee9da297d852c. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:19Z), 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/TWBP31600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f23a8a259d8f32c0c61ccf9c95282c57090faae13912b11428f9cad4ad3767. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/HKH141700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285972b7c8f7d08faffe40b67e9922d1f2812b86d78c0f8c2f8a89ec77c87928. 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/HKJ962009002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90cecc81cdf19b51a2bcbad3c6e8a1a754aef84fc5a21c4660305b4483c0c10. 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/TWBF32503001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90cecc81cdf19b51a2bcbad3c6e8a1a754aef84fc5a21c4660305b4483c0c10. 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/TWBF32503001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8591bc1952ab6ab5c64d1903034f7225e64dab87a3cf36ff9573ceabd6887c. 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/HKUM71600870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc38f83dc0c5b5208446982c983fa02a32647234834ffe6b9a7dc8ab1722e5. 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/HKJ961901011.