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 0x33316cc6a14a809d03ac4929e716e9a7101098a9eab8a2e271fb1a8579f5c494. 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/ecad2481-603b-4292-8d00-1e39baab8b7e.json and https://artists.proofprofile.net/proofs/artist/ecad2481-603b-4292-8d00-1e39baab8b7e.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 0xb09edce343404832d448ba29752bf7648c040d7228b18eff8c7385673f8d30ba. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZ4JJ1614214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e234d4350bcdd9d0127002cd0f84aebe0ba42a5185c5d73b556d6ca91e0527. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZANL1765798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac14deeb5ac574ae18a669192af2d7d13bcb73efc6f238109448b89faa4f78d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZANL1765800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50d981df3084c3a303f534e8535866a4203b846675120380424fd361b784625. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZANL1765802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd134daa89763f9f2e958fbdd57b10da1ebbef8559fa9bbc0f59cd994110f8fb8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYY2048553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adce198b99d4a6795c72e4f9dc7a74739100e9188f7310aff2c1f409ee0ef6c. 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/QZES62000573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb4ac207598dde0b0b8a8241f4f59ccc747a28c37eacf44e4843d55266b5f3b. 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/QZES62000575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dce3f3b6ff76c3db3825ce33f7bd97fc27e3797565c103e10b8d9ca46335d5. 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/QZWFM2380604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be6bbdd76b1537d759e3105a1c7212e45cec289ba5b773f59e2470a586e59df. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHN92431872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f9d2ba768ffdc6e38c13411390406e89d09cacc685cdbc1777d738412925ea. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN92431874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c63f85931d4ee02f5717d04dcbcd9d49679eba02192718cb0445d977496e32. 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/QZK6P2450305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6a07a4e8e41e1dab58f16ae5a2b223442f97ff7c11b30df3c18c0f7d295762. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7Q2484294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd276994bc9ae9b5feb1cf2ce36e90bcb676f7a355f2614f40068892e88b414. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWW2538897.