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 0x96577a8ce25bd9b0e355e0d433f766d2febf8d8e59a13c9ad7a7315b27b83c8d. 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/4b765893-620e-4549-9f24-65e26eb29186.json and https://artists.proofprofile.net/proofs/artist/4b765893-620e-4549-9f24-65e26eb29186.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 0xa1227761981eff45a1a70c024855f657c11b9f070bf17df89079891e55f73eb2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBGXD2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7f715de63d552e2043c2c94532ab6b451a715b52150e084ece2146b78aff3a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBGXD2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919fe1e2864c1a9b9d185ab1981d9d4ff6fced43c115aab7f2b96db5e01addd3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBMJG2113162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422793773701cbdb34d85ab9c7e89171ae0422a55c332fe41ec853d17ed1600b. 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/GBMJG2124141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dc4357e14daf235f5a18a51024c7a1065c5cde2e7235cef9012d1b058e9fa2. 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/GBMJG2205095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f489f93614223b4fa2383cd9960d2bea3d6e60256725a9c79c4143a9fc68a78. 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/DGA072390969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ecc9f8b7d9162af00ae4c4b2957b50ce8513d4628070764ec6c057522e354a. 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/DGA082346444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb3730dca4c83f6e0d919965a67269f05d9f90a6d311b1231b2734c955c9e4e. 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/DGA082346448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe910f7db6199c81e5145b9ad5ea92e7b9ddeaf1182651d5fe18b2a1009759f60. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DGA082346447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced57327efaff2f6a07bc0ca601022a4572d2dc2690ee97ca142462c1bc4ca8b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:36Z), 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/DGA082346450.