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 0xfe1af19602a449b688734a854af1ad35e88801719e166afd297e8080e4cfabd4. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/002d44da-d71f-4bd8-9039-9086f7960659.json and https://artists.proofprofile.net/proofs/artist/002d44da-d71f-4bd8-9039-9086f7960659.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 0xbf499a9cb5d8d3f274e1cd99babf6f9587d11b836770b6b13f59b76a2594a2eb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ792451391.
everyday is a missed opportunity (slowed and reverb)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b904a7a750091a45c898fbf1a158625858ff769e7acfe5bbc4f21a869c47b8f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN92581059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3662916dcd62a5c5d06d3b06e2df7fa349266b6cec30b8f5efa6fb115cc494. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6N2508416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95314a7d04dfd86d5ef3d6dee504f3e1c4d82bc1b1169e7679744eb1d23a1841. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6M2551509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af74507b006acbadabccbf445609d6703f0b30cb5b7ebfa2e3a8ea4a32b07e5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZJRB2542447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5848952c7da984aa0ece1f248be0cfe0caedfedb969cee25d7a043a2e1761f9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHPJ2536331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727f0abbbaafc8c18877c5105fbc641b183e35f46f7a823e43d13a2cb4e03b89. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZHZD2594891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e5819bd60ae6953f198ec51190acecc05627f864bdc9ca1a3e303bad6db39a. 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/QZKDK2576744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ba568931e35ccbe45b6f4d0793754c857c85178d6bc35148260a882f2dde6e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZJRC2546657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce76cb308d25365fa9e5c04733b13416d49d537fef3b04a733f31e3c532e2ee. 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/QZWFN2457857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc2064d6a2b344e75a496e754223274c974cbe3bccb32ed81c167873af53b7a. 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/QZTAU2411653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae2532543960f373d31c06c9b0f88d390200bdb9c5047375fa12b824e58b64e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZS672550503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a9987f04d69916cf1ca9e85a773f69ebe797e3f50d48cadc1fab9bfd728f9e. 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/QZHZD2550183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc02090cb968ece6484c9c59516be845af7a3f7b202f8e80e3c666b9fe06ab0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3EZ2457229.