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 0xdc84bb88c7125fb7f947c73d78ab10b06f68f1a9625eaaacf7bd93c407b5bd8c. 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/9b1663ed-179e-4672-8784-da0674a2d709.json and https://artists.proofprofile.net/proofs/artist/9b1663ed-179e-4672-8784-da0674a2d709.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 0x6bff58f7d8a3e0686b662a4255f9830d17e74aef519ed12c73ee1628f9cc42eb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMWB81101201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697ca6a2bf934b945d22fe3827279021f19b010f346c822153212d14e3495c6e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QMWB81101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe159b28a2507d535f0b47488689f26ee8cc42f6dd4bb589104d9eb4768064531. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMWB81101205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafea8a8a9b5972671e5adbe9eb1cf586b3a078ac6f9f2113f9b64551f051ac27. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:32:18Z), 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/QMWB81101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd1cd8dfa7beab88d16ec49c6cdeb4319b44429e49914a8e4b329526df3a64. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QMWB81101209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb90285e0cd2386c413cd8de7b45eb022b47c6a009c57decf63e0ebd61a775a0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:09:28Z), 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/QMWB81101210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0dfb14e93b607ffca4a31a7716db99f7a56778ce8034fac5e145d72c186be3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMWB81101211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad4f0b8cf3918f53fa8757434a710c6fababf960f0c3c65dcbfb2090d90581b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMFMG1558732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c78dd47cdf99fcf6052ec0431af4a0a4a7113e60dea8f0a509d2ff357d86332. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFMG1558734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8039ba76efb7462c27ed10831ce4f6704b0cd2080a1060b0de7b967ec4c7ca3. 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/QMFMG1558735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2eefb531ac05f4d3bd6fc2a0cf18e5ae1cc50482c2bf04c82d9711aa29cbbd. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QMFMG1558737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa460851a2ea75b27608248be66659791c5aa57c5e601ba43fdb2447ce08ff03a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:06:21Z), 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/TCAGJ2206850.