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 0xa85e8754fcc5e781ded440094669e3664e9344cbd66abe7cfe7d4dff2b6af71e. 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/f9813736-ec87-4bb6-993e-317825a4568d.json and https://artists.proofprofile.net/proofs/artist/f9813736-ec87-4bb6-993e-317825a4568d.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 0xdff9b966371bfaadb8e00cfbb7a680e354c141a7cfa4d95e87f9c39741f97e93. 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/UKRMQ2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04a7c15a1c131792edf8d634de26547da90cfdbfa504b22b4118ce6ea128ca. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/UKRMQ2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a6bf9ed1dd7b4865c89961e681f2c893fe9ff5da92d52c0c59fde91ef839a5. 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/US83Z2138963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585e913a4b419b5d4a08eee8962d187a41279e2e9fa0cac28b734d04bedc8b4c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2138964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092385edba3b7a86287d0b9c0cd58693900c8e49bd3f31a5212504070d42c303. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLF712207651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e89086373664e13a473418b59d7dc6209e2368a3dde9679aa9b911303705c1b. 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/NLF712207650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c0114dbb347dd1701d3174b53b6f7f1ae23004fcf773915895eacbf907c823. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US83Z2240381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3274c2134a39464d92eba6c1981a73c4a87c735b486165b61d52c9c9247e8097. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2240382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8da5c9790aaf5bd3ce53d51925387cfc9896a8b82a95b42812dfe7f054efc87. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US83Z2309121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8aefc04fa514db54e870741866cf02f99799ad018142151ae3f3cead1db4ec. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2464234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceb6ad0f58df97caa0de4517cabd7a6e9183113e71a50ad25c14035c4c8b610. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/US83Z2464235.
FSOE 836 - Future Sound Of Egypt Episode 836
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208f48ab3cd3f493aedb24efd93100a2dff906ce54e290064bdc07280bf741a5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKRMQ2301497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba33f03e6213f2fdfb3c969363e508520053ace3bbd19f4a352444f39dbf5c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2203685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf106254436900ef139a13f4f39ab7bdd89758f3584c049f903574890575906e3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US83Z2203694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a0af57ea7f37d0a58a358d9fd76ea713ce298dd78a8787a031218e0fca5933. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBEWA1904435.