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 0xe1c34d135e4af7ebdf9cd8d9fa7257dabec459c8ef7b4ccf1e55dd66f086e3df. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8ef32b1-4040-4a0c-8a69-fee3edd78d00.json and https://artists.proofprofile.net/proofs/artist/e8ef32b1-4040-4a0c-8a69-fee3edd78d00.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 0x1356ae2189cbf1122ba474c9fbb4d2dc69355b2f80b8b5c5108c0dbfc2d5f593. 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/FR9W12149728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5120be77e88814b6eabea70f1e8e781492a73b7a80e4ee43d22fc790e4a90228. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W12149729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bbdae50be97d7045a0f7bd2ac44912165584a74e89b51dc6cce94265476aff. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR9W12149730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a13e2c630a60692cd47865b5d79a8c0ee3f7cb4ecf30fbb13b6bde6aaac6b23. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR9W12149731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd4b1fb836fc6c4a9f966f7eb185de395d2ca1d7c898abb741475cdbdfbeeb5. 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/FR9W12149732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67765242502094312dfd44c08c523c41afb7f43ef20db5dd28ee3c794870f23. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W12149733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a46bb03f53596b71c6236da9d32ed3dc3c2661f400f58086e611fcf7809d124. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR9W12149734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bb96eb167185a71edb29000e473080357645a0ecf01c9081a468af729a683f. 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/FR9W12149735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bf7c95e9ce9dbdc861c10ff00722e574fd7c5ff010f9152c7380aa31ec04fa. 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/FR9W12149736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c3e37245c6617d7715c35257605774aaa0235883262c005c97bef82b224bb7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W12149737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ad70a73ba36b7646a4505bcea5daa98b0510a4814513cae48dd44cc0228b02. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR9W12149738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ee07e26d1080b46d99d3c0b2dffafcb40e99064c17ef6754c9802454b30434. 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/FR9W12149740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04af726ba00366f449c8736828c5a1bdcbbafef00810f633aa040bac239fe770. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR9W12149741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351558f0ce67ca537b39ff6254e58e5d190a3cd8f4826248f1a33c107ef16df4. 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/CH6542086101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f6b5ae9ada4320a7eb4c606f63aff54d65e29c691f6b917020c1543978625. 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/CH6542086102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34bc5252bbec882c056ce72331e3a3969ed533636526cac3ee7ba2303930c0b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CH6542086103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8f5ade707dbbcbc021eb820c50c9b184b76d4cb4274b7fb1689dadc003d073. 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/CH6542086104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518eed80ed261686e0bdc35e307e542071eb3845da06ddba3ff7415fe02976e9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH6542086105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3f25edad1bc893a1cf84ec70feac67ea4daf3b3b59c85e4036bdf845fd78ec. 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/CH6542086094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513b8894440f8d2dd9d6d88592f7cef66f1a61aa10c7a63ee0a7db97501e0b53. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH6542086095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02349e84dddb72f578b450fd9d2c89ea2305ad339c864133166f0f56faaed0d8. 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/CH6542086097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ee07e26d1080b46d99d3c0b2dffafcb40e99064c17ef6754c9802454b30434. 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/FR9W12149740.