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 0xb80690aa053a4da1b1c12cb0aa50e6c9fe54be81db81398b4e53b7ff6d3d216f. 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/8741c2fb-7208-4f05-a4df-c150a6d51223.json and https://artists.proofprofile.net/proofs/artist/8741c2fb-7208-4f05-a4df-c150a6d51223.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 0xb9018f11133bf29f54b1a7b21c6cc7c949cad30092a264858909b639ddc3e580. 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/USCGH1738355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fee491d139f5f22818894bf52750e782cb7cc423ff953dbbe82843ea044b38. 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/USCGH1738356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd7cf6c7117fe5a3cf30ea2673cffafe02c91724dd6a8d24cd3f159d860e278. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USCGH1738357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c801b8cab482f9f4d53323214c5c6a73c8727c5cf62194ee71f35d9b1ebfb3. 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/USCGH1738360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e5259cc71484a0583af989be2c51da520de688df62c588dc572a1daaf79005. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGH1738361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f7150f4fd435d5ed33276f9ee080b54356c732984ddfbef8b882e9ad96c4b8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USCGH1738362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c311ef98fbd8b8459db7355e72334c7342689119712ee8d950ed670d952c7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USCGH1738363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230655eae71b5e7cdad3b97145201fb9784e02958f63549743d2b6a455051bd2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USHM21972499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c9dd4ea1e7798bdfc3124efa8f01e7ab68b255a3ce095374e0d8424e33e11c. 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/USHM21972503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07f3f2d6f1328837025c06ff39262de4b21bdb1c5586bf0a072686877bcaa0f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM21972504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1e70eb1a1562b384c2bca543f3ce02c3074cbb82ce95d307b366670e6f7b3d. 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/USHM21972505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a530066f751a534d6089f9b216d2d46067d1d930da6d0c2ba785f2260b04db6. 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/USHM21972506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99458a5eb4ee805620722f4ef95a32cc43aa59ea96832f6a4e03831ac2d65ed2. 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/USHM21972508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bce2fea3e2cdb0b2bbfccdc0a75a20fb85f5c67f08d095f564dc7835e6b18db. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM21972509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb80c44e047c107e811c2c0372c22c15d42abc20054edc1b663eb7c3b0580a3. 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/USX9P2098148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2ef3e5e2264635d2fbd1387faf11daa3b984bf361755ea11ec088cb514646b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USCGJ2293982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8ed176bea89305d8ab9fb3a6a58e9f0073d53632970a4512768485ce53f03. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMHL2394444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4747c65f076dd0f5ddde027b5c3885c88917c212fd6c6d229b7d315888645b0f. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USDY42452074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c37fb0d74eee458961219bf4b55ff3856d6a59b1803ed73fa9f23265f1ed72c. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USHM82450532.