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 0x1900ecdada096e35736e982fd771fbed45ee17bcd4b74541a8921a048e6711e0. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb690b19-333c-49e6-98fc-2454fc49090f.json and https://artists.proofprofile.net/proofs/artist/fb690b19-333c-49e6-98fc-2454fc49090f.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 0xca54c8a9cc852d337a2833c37011a0f6fc8e691e76b32a0ef91fef85a99d74ed. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:50Z), 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/QZMEP2081475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdad9a752ecfea85d114fd6239ee9942acc6420b32f718665bc54584cff7dad. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:50:01Z), 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/QZMEP2081478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b0ff18c8bf7b2f273481f5549eda40d086c9b231999380f97b1e3412b8d283. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:40Z), 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/QZMEP2081479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b915e7eef563d552639aadba9a34db4cae6adbb4a7d22a516f3f55e79e3a39. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:39Z), 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/QZMEP2081480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c290deb886c21773be60716dac04b5f7f7245a3739ba2813a8d03e307b19495. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:57:46Z), 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/QZMEP2081481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54408bb796c67d98e07a3858e6208b6b9e07638483c32e2eda3ceac6b091cb23. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEP2081483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1131ce88043384a4b9aea334336020816c2cfa3bc212e2c38a4878dfd52a37. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMEP2081484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5bc880ad79817716f3e8373a2127469bc4b02e9bb42e0f27d24f40340045d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZMEP2081485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad726a8e0917af30ad63f6800b1716ae84128bbfc3c8d8d4a98dac7a5b71ef6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEP2081486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc59c38364c9692f47e0a037da741c1b766ac9f3b4a0729352156e9dfaad92b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:36Z), 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/QZMEP2081487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22e087052a433c5467d4cc4c770eaa14ea623e02d068def3a7670b523585e0. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHNA2190780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b50a5779388f0fc7b4eca5e863f6991cffc3fa1930fa59f3d065f973dae6e4. 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/QZZ7P2591212.