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 0x79ccfcaabd5e80a1ec5a2483820371cb1aab0d21bac50b6fefcf5e1013402c94. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb437d24-4c32-4add-b674-6617f91d3457.json and https://artists.proofprofile.net/proofs/artist/bb437d24-4c32-4add-b674-6617f91d3457.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 0x8aa4dae3eb2c3d37fbc875ed72d97a9a75d45a78a8e6c2922b83639124a7bdc9. 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/ARA821100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b02eb93402f76ec996fcefeb9cec10c5fa74bdfed0f82efb00a5652cc52541c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARA821100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e0342402cf67cb31b076e01b65cf75637a494358e0df50057652aad481cf00. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARA821100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d28d686a2112a331b193087b2237af5dbb30f9bcf7d43f523fc5d3893969a9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARA821100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f76b5efb8e91140fa4fe3943fba8334e97febecb4d27b537dd31bebfee4a45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARA821100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5488f8a969639846d9649fdc946b3bc473f058aae23e9ed4948eeaa50dcfe8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARA821100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec7546b3341d3b40605364741f4b3e931991cf10786db8c43e414989637cc15. 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/ARA821100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fcd264b710ead3861d892efcc647743c06d9901c0a558682b22486562f0527. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ARA821100133.
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 0xe178cfb52d7b9d1db3d4058e89567ed08265b0f76ed9d1fe2bb47925491d9412. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/ARA821100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc1930d90d70650f8bb5bde552224c4e3b717e0de3bafa7e6ed289eb4ccc9e8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ARA821100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cc62f1f9228a85b7ee9f5e89e07441e9ec56a25e09bcd4d61792cc08fea0d2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARA821100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3af473dfe43de896e881c75cc16eabb40a98302eb15dbd0ab3d4fc27d972e69. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARA821100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1396b9e63da2741c97641cfc3f053b19f7725d3231678d3c93473a8aa5795a40. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ARA821100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2e5efaa62630089ecb296aa761aae4d68db392ce40e59261447dcc1a5a7415. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARA821100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29a75c23f191a62890453cd97e0913a50303f9b8d14ef7896b9dcca98f0544a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARA821100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecb804a8421be6168ff2cf6cae22cda852831057f66d096014755ae8a9a8826. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ARA821100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae51ae50163137eecea88c244e9f32dfec4fb022197801c263b0846061238c0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ARA821100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e616d43519f14b5b2955a2af7cca367ef8abc4b6bf9a2dae696e6e7b36dc0e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ARA821100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba2bd15690087d511dfa1056f25a842b4f37e2c0a90b46f8a72573847ce99f5. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ARA821100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496cfbe09eb242374ca11cb2746390bd4f0dcb2d7349c2a75b83cf56875118f3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARA821100142.