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 0xbf5bed5e192e9f5ac750db9f61910dccff7023656cf732c0033d2ad2fd1cf9ba. 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/6475f742-4f25-4350-ba5a-1fce5538509a.json and https://artists.proofprofile.net/proofs/artist/6475f742-4f25-4350-ba5a-1fce5538509a.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 0x83de8d998db2204370fe5f14393078144712b8074beff8efbe7d031650de409d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRS712200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7002f198649bf91d6b998494b18939fbb454e44bca382e23889714d30fd00ee4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRS712200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6313e7726821c9dfe2cb2d14119a4e507c36b445e1fbf74f9b3a00f8786a93. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRS712200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a17f9da383e5475a49242b29502bbea99ac6a9f586242569260426fcb15cdd. 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/FRS712200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902ac50e7d1e2917e896476de70127cf55b937ddc31ab8e3df371b5cd1294ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRS711600150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19236bc3f969bdc0b221b3ab1ea7409ec2dc5976220e96ce4d6a57391f93c6b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRS711600160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a2a228709705613d374a87bdb054676773f65fc9fa45641aee26634cd74a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRS711600190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd754d1acad34a49322b12223f7fef5e1abedab3e8ae3ec9f931681f981ac014. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRS711300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8feb875293a90a915976793299600c69ed49f1d544046b0985d48adb8e06d6. 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/FRS711300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691a8321e57d9f668825b9fe9e599a36c7796f01e6a353d7bf446040f0ade895. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRR641190148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4466a48ca8d26ff179e5c26e2de3e723b8c65dfb34f9b997a44949b9342714d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRR641190149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b723437048cf29d664550659c90050437772c43b0ad86fb1458c1fe622ba11. 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/FRR641190150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b89fc6866263086da7ce2652f6acd5158dc7894162121492f73089854e5f97. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRR641190152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232eaf834c24313fce66f3b7367d78d5da1fac19e9dfc7e5c486f7e8927afaf7. 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/FRR641190153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a6f5002badc9871e08f7fa078550f71ee61ff14d55adf0a7fa99f1c4578202. 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/FRR641190154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28281c8a1240584b13f35076125bf5f8e68029c8d0e6366a05240f0604d41388. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:07:36Z), 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/FRR641190155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ec7ca4709664b8473f791cc722d6d404e8a563bd0c6de885e660f614fcc118. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRR641290006.