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 0x7a507f77f00db72f86b1358694a4f6c8e0002a299dee7e441bbcb0edd6204341. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b145a7b-33cc-49c2-85f9-15d2d516947e.json and https://artists.proofprofile.net/proofs/artist/9b145a7b-33cc-49c2-85f9-15d2d516947e.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 0x14740cc5a09c5c0fbb110865b97b646aaa16a6c682ccf04c7df06f933af503dd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:54Z), 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/DEFN82200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55a1355e5f6067379faeb775793f2c24944a859e6cb1ea82f83128e1b8926d8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEFN82200317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed3ef11af15c7ccdfe38068c6e5eae1bb55400f24fd3f094b112184326464ed. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEFN82200323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59323deb996b8b7a5ee595cc308b5fe5a8c910571e2907a7ff1c4422befb730b. 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/DEFN82200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854c211530f349f1dad24a4699f87a62afd75c06b89fc7146a7ed05581684078. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:52:16Z), 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/DEFN82200337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8350aa9e322ac974977bb32375dd89c5546adbda6af0eb3d182caee88fa69c2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEFN82200341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9166455255189ec22f3647f78ab35d317acffcbd8379e60f6dfe6aed23bd7d8c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:23Z), 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/DEFN82200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b7112a9ee8306680a796488bf3ba6bd869206eb915c772686c29852abfd2ce. 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/DEFN82200349.