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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cef778b6bcbdf610bf7ec405e9927d744e008e1c95febf4fd3185f79051561. 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/b09fae9f-afd6-46c2-8ca8-759232d736bb.json and https://artists.proofprofile.net/proofs/artist/b09fae9f-afd6-46c2-8ca8-759232d736bb.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf230f8f6ac4fdff346943717f950349c89f797ac8e7cc2343823815b53371d8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2580116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69ea860bf291d3069ff465400fc02119e73fd4dcd38255fa354cf64e3f8c064. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2580119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011fd442b21f2466c46ebe4af961851b8f6398e34cd2d2b9f30f09ca0b04c4c4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2580126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4842b519bc8cd7085ff85de3435c4eed653775f9d05aff1519718a143f42542. 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/QM4TW2580134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771f0d8c99599b4d52f7a3276f02dfd978b29b63fb79e5268b1678a7636d125f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2580153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700a4ce38fc01b970324442c31277a979a6527149d9d5e3b7d8c4ef6303d2c3d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TW2569201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1328739992299af21918d6f9ace1fcdb9a19df39f591e0bc6d8eb7e9706b991d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2551226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03548e80cab1ef86429c29287cda9000bf90a887befcedc609185f121323cb. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM4TW2551151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac501d4136689a56bb4e8624242dd9d85cd1d1951615e3b129c07b2a978c575. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2551758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65107b6b88613b91f5d67f9f8f10abc2b182e6aca67f4e0e39727d2242d38e11. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2552651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be09fcee888d5ae7aef9228415236c8f50ce79ba925dbdfc18ccce894421d14. 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/QM4TW2549435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a79966dcc7956c3db57aac1985d174682678ab4ec4c642c6006e4cdf853b798. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUBEC2206394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585fa98a8001d4c69c3cc65a12850bf9e4dac9ac70e8ef1bc0cecf50bda70386. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/ING501802402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedad6e241f0ec2cc56a02ca5df3e67dfa54557401c68b16e3998852535cf5827. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ING501803267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4198e8c21883316d506bb8d7936ad426bfe08a7b50cdea3e31d5a75263848c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ING501803160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1295d3b8c95c554d8d2fadb6075239ac0da4ce3b796df53e1892d57809b8b148. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMA22048584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cd49808858aec5198140aa6fa8b7bdab6694d4519880614e0bfee1b1e7f1d3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ING501802775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31d8905ed0f9aa48e18653af6a7b00ba67113f62ac91a5f54bb495144aa155b. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ING501802170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc505a4ee9a659e7e2c645ab1d51ca6b7257694b2db4cbc1f0cf55b3130447f95. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX201999694.