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 0x6acc9ce8aeb733bd55a5e03a7ceab2781472aa9d71ac8b81d897c9a2c8582ff0. 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/0aee8118-953b-4e8d-82e1-0b38029ee925.json and https://artists.proofprofile.net/proofs/artist/0aee8118-953b-4e8d-82e1-0b38029ee925.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 0x1a6da6d9d10f5753b503d18a3b3ea1b27fe78c59f55a161c699622c83581002f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:54Z), 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/CH7812107583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2c875bf9b9b712772cf6a01d432d8c42655ac8da62c3485c49a08341e48c7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CH7812346401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834e260eecb0afb845fc59346dfef0baa92d109096815e464815b5355e97d7d4. 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/CH7812348970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d789ebe15ad44fe6b66fc3bf9c0be4227ef093201fd59fa6f7c39bded46f785. 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/CHC382400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c350d5f757b01db7213644e796ca72d5bc5761ff1f84d1818f7411c293986. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:43:08Z), 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/CHC382400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7287f5c88fd069f5d044341bd2c2959be48aeaa24b0845e1a121c5ebf3cb86. 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/CHC382400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4b0a46ee1b563be6ed8a02ef95f7d74cf5f97d46630e4f583638f37026f871. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/CHC382400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5c80cab9dea7fe4c2a0b6a8b32e0b3a1e9f1e6e02014eefc635f8c767606dd. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/CHC382400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9273fa2c1ade8b47300e184d1e07507e9783023859d42bd5695d9b295700d68. 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/CHC382400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde881f79b7e4b499bd891f1d3db06d84cc1bcbe5e65a69f8de06cc34e3cb03ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CHC382400117.