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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea79348372a45cbdd504e704b51eaabbb9b03dc97bd2eb6abf2ffa62f4b77d06. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f568421-0f7f-4a0f-9021-f4f9eb1d46ea.json and https://artists.proofprofile.net/proofs/artist/5f568421-0f7f-4a0f-9021-f4f9eb1d46ea.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec4ee550f08b55d56b60ef171735953e3547f77fe61e6172255b407f47d2fe0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:48:55Z), 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/CH6541979447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0397fa389322cb415d0577d3e5c8253f260af8fc7f9d5aba77fde7aec639bf6c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH6541979449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c9d8b2ea88c6134a6c79005f78e5c6fece3263d298b175b5a7a6545c1828c3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CH6541979450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c02d78c3bca3ebefc68885f6ecdb5466bbd05ca189188d0c30e106716518d1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH6541979451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bce30cc1a9dccb4bb80b92e81c23aa1e8bc56e48248cdab9282aa733777329. 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/CH6541979454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9f85136775a5d4cb763f266088547e45db2ef100dc475476177ba2a3eaccdd. 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/CH6541979455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188cc7e24384a18f56347289266994e1b9c1d645f0101948b65cd3571bbf5cd5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH6540897238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7313aedff1c583d7ed6893a3762dcc76eb0bd53c86ec6a35d8a73229fe090b09. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH6540897239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548eeee4b1ecff7d51b1e06ad297bd32b1c777f7212597f8fd64431e8bd7adb0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CH6540897240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b6ba733d0f73357589eaa645ece2d829bb343ca67081ea5eeb297543dcd895. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH6540897241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41a0b8cce5a187008fbe54e7db85e172e69b6c86fc88af955e8800243034475. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:32:24Z), 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/CH6540897242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0060ba3249b4c0853254ef1eea1384cf037deded0731f27958f96d18fb560e7. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:30:40Z), 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/CH6540897243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9719e977e0036923aa7c53293fec32b787c338c217ceb41e68dec859b782cec9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH6540897247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3907d57d9a07ccdff22f22960aba45b34353d999287e2d8d1bbb61fa702396. 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/ES71G2503223.