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 0xbedf98090ee435d9efd8bf45e79d521840259672648ac0e81a26f087affacb7c. 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/38f8f5bd-1846-4b89-a67a-2d358f2c133c.json and https://artists.proofprofile.net/proofs/artist/38f8f5bd-1846-4b89-a67a-2d358f2c133c.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 0xa799e27068506f0ff402e24b46cb6452f640ab5afb5888f75d0d7411a40cc5e5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:53Z), 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/RUA1H1900375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe916e50af43d1954875e59083c214438f61e815c44ba535089684ba35ef8ef93. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/RUA1H1900378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc93276e2996c4a247d40ac701a889d7c55bb95285cfe9f05f0c8c0307ef7c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUA1H1900383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649109d753af2b22dac04113c6a8fdc2f91f150824f8c73867cc089cec640d08. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUA1H2094342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e3db28e272ee0f2e8580f3a86c4856c8265a12dfdcd8d9a6e19b088d47ee6d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:09Z), 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/RUA1H2094343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33a7aa706225e0269e57705f2787df435c914b16edd9a82767c4414c4cccb15. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/RUA1H2094344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396921afa832569d8975a71de823444b960a0720477a1b9809218b2b6f82f458. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:27Z), 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/RUA1H2094345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca113b58427187f99b1d411ad4e4c49dbc79b26b21ed9127731bbc21510dbde. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/RUA1H2094347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf7369e1eb6a42cc77ddbeb8dfa615dc9c69dba02a098b3fd22020014296d94. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/RUA1H2094349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b14990e3a4b8490de1c28b725eb5e7d4e79ec4675034a28545f0b81adbee53. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/AEA0D1893387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1a26e886dc5c9b840a73bc5970138dc081cddc5e8689d97d74c4036d3a69c6. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/AEA0D1893389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b536af876092536f1ac5f2a4242a11728c34698570f4b1f6404b9a685b89fa. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AEA0D1893394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7da266d1aae8cf4b4fba437bc4b32cf67d0203ac63ee3f7468f9236a102db7. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AEA0D2155621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d28bf4ff83a776f19b24182a36ad5f31f711f4260f68a3577f911f49892515c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AEA0D2155622.