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 0xbfc4054d27cf8dbb5f7ed68001fffe921ffd4537fc229fe678105f810226523c. 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/fce3c20a-d463-4ab1-b6de-7627fed32355.json and https://artists.proofprofile.net/proofs/artist/fce3c20a-d463-4ab1-b6de-7627fed32355.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 0x8c2f6d56eb942c970e25c8e8748b7e7f3f20fb6974b10cc0cbfc0c252c5fc7e2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:08:59Z), 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/GBKQU2255120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2550ca5a8e49eb4a77c9cb55f9ad265fb23d2e827828c633cff2d7a811fc4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:37Z), 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/GBKQU2258235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8b0698dd00bf99b58f1e8468bc627fbfcf43be9aa7715cbbe8f61f373fc2a3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKQU2312374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53069fee308ae07b19640bab7eaba08a9f9d83513d5c65c9c004adf1c5da28a3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHF2333236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cb4bf2473ebfaf4b5704f84df69f78ca42b4544339c20b5d4dd9acca058c6b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:47Z), 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/TCAHO2361309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45171451c0104964ba01024077e13f29049cd2b4dc9d9f086b25afd471d23bfc. 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/TCAHN2373567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad475967c8a62eb5a9b4dc98df6fdf27301958cf0996729edd680d06bec9214. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAHW2439359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858dded3a76e8b53dd20d2fe70687b9d6b65aa0ca17314bab4f48161d3077043. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIB2451615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cf2bba63dffc5c68a5ddd632ff8a874640d9ede41eb44293e0b02b374f9a30. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:02:57Z), 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/TCAIF2424563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4297a831e398ce6e40f1f384529a997db8f208195d68c59839e9eecfde427874. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIX2464481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443cd98536cd521a5362c6b7d5f79e68f6e5637d309e760d6ba4c5b0363f1be6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBKQU2507910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f80bf3cf4d850264b3e147694d51dca6ad4747cd36a795b9ab310b667f3ac. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/GBKQU2504189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc770fd8ace1a737a76220efa5792ebd9b6a8f8f0d3aced6a5aa56df6bdb38ec7. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GBKQU2505549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e7e9a9ba32e5c954b3fff22d807f8d433f937458533145b9da2d79a2f90760. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:01:23Z), 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/GBKQU2506276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bff002da759386a62dfbc6e282a30cf38c5337943c900d395bb18eb692e7e2. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:58:05Z), 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/GBKQU2507348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb9ac78a19a90e341236590bb58c88c232a6fd7a235147488d08ada734013e6. 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/US83Z2352115.