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 0xc6680fe150df147779824c423ff76f5a9789d1ede103724f9fab086aa0d23b8e. 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/0158a0ad-f8a7-4921-b37f-b1c477708b15.json and https://artists.proofprofile.net/proofs/artist/0158a0ad-f8a7-4921-b37f-b1c477708b15.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 0x1500371e171c9ecd81a940e5caf6dbf77b250e525cfeb03c26ad3f3ee8be0c83. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKD8Z1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1159578213f0d96e42f68cf8be2854a285dd1869c1febaa63f74c8fa3a13e3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBX722000412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ee527053843af2d6b07475a77ab07c5b95041bd109237e1da40e4cbe0b40e6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBX722000604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8248757baaed8e331c5b9cfd67e8d80fb3db5b4b7439bfdce90c3536ca667b3e. 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/GBX722000605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2242f14f92b768659a27cb9440ddce53760002078490c94f5fd7a86416af22. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DELK22300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a7c9db69922b4b9a546282c0d1e81df623b83a5de2ab4fe3c19bc745cee5dc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DELK22300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee3b0299a5a7b7b57f164c4903dbb74996221fc104cdbfefa18c3bea5541999. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:34Z), 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/DELK22300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664e584da35b6a485d1db63180c2006585fec82647c0d5aff26e79a990121c7f. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/DELK22300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328297555c069953abdc909b49e1e2215f66ef19873daa7cb214037b33cd3340. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:47:28Z), 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/DELK22300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e907b9fdd580ac5fdb1c4d9e8853046350841828ec7d878b2c51600b0bd135. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:41Z), 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/DELK22300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866e6664f80af489a337e38ae9379631a0f8e00c78bdda50ebb20142f4f01847. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:46Z), 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/DELK22300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259e7db1581e624e91f5abaa692dd3d87e4d6908e7d95330357b238221a733b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUM72100293.