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 0x55636a6be0fa0ffc96f7f1ce101a43dc3ee25f9c34ff5479b4c290ecb263022c. 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/fcfe68c3-b6b8-4e1f-9ee2-b34a4e6902ec.json and https://artists.proofprofile.net/proofs/artist/fcfe68c3-b6b8-4e1f-9ee2-b34a4e6902ec.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 0x6d56e88209cdeead531e5d86ab62e8e82d4781fb8994e74515b8f4242d5b2ba8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:26:05Z), 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/IDUM72200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ee20779c1860dbebb58066431fb15f798f91ae2f71cf5c4d66b31132b2cacd. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/IDUM72200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f04095923bd0ba5030d82b76d6f30b5bbbf568e08c5778151daf0fadc053d0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/IDUM72200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f853a3507a3b2cf0a045819165a92f3036e630c9d699346143872d5d21d210. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:00Z), 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/IDUM72300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deb0b0369f41172389502668879578b1bd5553cb015c5ed42843811201bf8bb. 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/FRX282424171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b7bb2a2a84cbc9bd1a4b95ed115e24adaebda03e852f0a2b08aae48c99112c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762464605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a41b8148b51ad154b801541f37880278c31625ef8e054be6e7912c79d1f95. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA052497136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03d3f476ae46ace42414be05292223f3377fea9100e64296c8f4c95692643d0. 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/DGA092432233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3320825218e21df58db3e2016d05240e8432057b6c4e8df67e8bea066a599eab. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US7VG2590301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03d3f476ae46ace42414be05292223f3377fea9100e64296c8f4c95692643d0. 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/DGA092432233.