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 0x14b448715d8abf57ceba420e3ec105cfe5bd3bc4c070aea18d90b56db6dc4e67. 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/2f28d70f-341c-4aff-bbef-973078b11474.json and https://artists.proofprofile.net/proofs/artist/2f28d70f-341c-4aff-bbef-973078b11474.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 0xb6b4105e0ba75c4c9619bfdcee26e338a9dfa6fbbdc7803222d3de9d6e661251. 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/QZTAS2355962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c52f749e4f555d0b80b815a78d769e075d4bed967d02bc9fbf5a0ec57cbb6. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QZNWQ2403250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6fac684df4c77f942a03227c5b821a7fc8a1ddc90fdee42d2f8b4d4c06e65e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWT2410852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8a17cd8203f5624a8c1750afd0f627596886114d5d2b6e5f086d0d35d5b6e9. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QZNWX2436696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b1fdef63a8ae0024cec3404a918c235db621d9b986b5b688d8f03068bbf7ee. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZPLS2477638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6faa4619491def4f87a4aff9722d671de3f01e738056d7f3d9f92a6046bdbe. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZTAU2434411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4780cd1a88f55f0c2eb9ce9d2c341a8e4240ab56493db8ff53a3656ad0dd142. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZTB72488396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84a9565b93bee1a5ebbd9b8a377cecb2fc65db42ddd4a3861e1cb789fee765d. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QZWFF2431865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a8579163f8ac4ad5dc183160249293413d9801aca6055d9d5d060f1406578. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2530232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e82330e44ab3d9403fa5a26ce1d25367165578a9f387f0f91bec26fc20222f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2530233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa5d12c6d607f097a74b9461ce115e8556318ee3f30858d8919a097e8436366. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2530234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0528081799e2a888c63cb2b72502bb3d137469e3120cdf66f2a2472b6e21de2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2530235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c483b842966f0c71cf0aed473612c072cba7766fa153ff07fd3da57c190643. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2530236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223af4d19c2a16b20eff85d5e1ceb9c332347fbd7f55b32edcfc95acf7f4072. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2530237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929bd20bfd5605c5e2686951719a6934974c2a5b66157b88279baf4803b83786. 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/QZFYY2530238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411d4a027b6f66633b80e69df61c61ec7e3bb059a318595d8e37547b70b6ee78. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2530239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebb7b41bb2b104c073294c4e3e22ef54713e309105d84fbcc34f3fbca9fc58e. 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/QZFYY2530240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e12d80908ca52ae4657a55bf8dadeb385953f46d720bb73f0a9a0fc5216270d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2530241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149360960aa2530b7f8c9f873c6a8345ba35d89ad99a6b6c066575705807e205. 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/QZFYY2530242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfd13e590b589ec0179ab33b19f31b94c6db71b377c718fe783acfb027ce9b5. 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/QZFYY2530243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa04bee7e60cd1be89ad4d456f4adcb852ebbaa27347f5dab0c15b55a061bda. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USDY42549382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8edc08e098d073f5ad9534f98ccf2409bb79475095b11344da6e6e7a4782f8. 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/QZWFH2530550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8edc08e098d073f5ad9534f98ccf2409bb79475095b11344da6e6e7a4782f8. 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/QZWFH2530550.