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 0x9de8008998daeea9ae283c3829413a722d57389e9101349f29dfeb00474c72af. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b792aed-9aaa-49df-baf5-b1a99c8a8006.json and https://artists.proofprofile.net/proofs/artist/5b792aed-9aaa-49df-baf5-b1a99c8a8006.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 0xfa74b2262451097ec5053a5299552ff8dbae8d84018bef3992e8f12502da161b. 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/ES14I2200635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d61b057cf4d7b37f94f0a6bf91dd3bda601924edef2b477e6d6a3537d401a5. 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/QM6N22233319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedc75e00eaeeb4d1f081f57e54afc9ab7e7442c58263a4883cc212b6c30dc6f. 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/ES14I2200632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f7971b71a904cc2789ed3fe2672ee533318d8a18df100ccb94255f112d095. 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/ES14I2300799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68aa228a51298399e162d8ace33b0dad47d98f18a9ac49665795a6775a4c601. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ES14I2300849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c57182a17c6ddff4f45e04317b61e63407aca5bdc89d2b6d89ea282374bce9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES11C2401584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18611796a93ddfc892fd79c0795400fa391dcbc3078ef32b548d3ef54887346. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES64E2509259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ffbb1913830c0989d2f19349e27d891c66222b6d7b862f06ebecaf359d5e71. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:51Z), 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/ES64E2509098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50b39f81e56d7aeaa9e92f9c25e4df8762ec2bdd9e97b85362bd14b9fb3720. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES64E2509099.