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 0xbd64e0b96f7b29caff7e939c83456d54a81fd028642ad0d54e88e6bad3647cac. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0f3de56-6ac3-45e7-be38-141006a4d464.json and https://artists.proofprofile.net/proofs/artist/f0f3de56-6ac3-45e7-be38-141006a4d464.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 0x79fc69d3be4d6fe4c9d6902f48721605ed755817f524ed88653a06d786f02168. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMHP2450853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931bbd5d3b0a0d67d2850097cc8ec30083b0553cf7393d8407e0ace42f9cc0e2. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:04:33Z), 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/QZMHK2434787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83f619e2e657f03c9f61372f54aa8a6b64bf7cd1853aa3a37dceb43cd31c16d. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QM42K2453463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaa2376cca7dc2b94bb4fa8e8b9fe30ad1d3232e9961612b700b809e7385999. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZS672452722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5d95aba093d27e0cf363b44d90d773d78bee0f89eddb852c84b0edbadad0ba. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:22:21Z), 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/QM42K2492176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824f3f5dad1cde7380116d2635f9e6cc904aa6c70e9f7a58dec53eb6a607cf44. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T09:00:02Z), 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/QZS672404282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0898460019cd24b420834b92ed8b1d7bb555448d274acc0385a249ad76716f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS652416357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41890f382208dc164cd041bff3163c378b1c21e3b63a4295e248afaf3369fb23. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZS662466040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d142c9d5051935b1c7191772a9f1fe3cc88d65ab40e20e74bf75e9567e78e2. 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/QZMHL2444217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3543a0297e936515324d6470c7971bcb829ee10280b84c8646bad6e38ca5536d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMHN2478059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcaf559e9e04bde9bd879724450c3fcd0d511b0ce0f10808f8031fec3ef7a35. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZS662402229.