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 0xb3cb75752278beb24c7a17d918f28e6cd9ab8bbf9a16409b9c43fe359a5e4ccb. 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/6e96a8c2-58ad-4bbd-af7e-3ef4bc2d8516.json and https://artists.proofprofile.net/proofs/artist/6e96a8c2-58ad-4bbd-af7e-3ef4bc2d8516.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 0xf43b8088a8697795cf8ec7860515a2e02d7ecac9c2f03b812add5e59f03f767f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:57Z), 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/CH7812357824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce921fc479f4a363fa6ac5ae26712888ce5a8347b20c7594a287ca573b800f9. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:16Z), 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/QZNJV2446401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a92493ac6177b72a7d0246a87e68cfa00bf58311d35f1f5d404651e6f858316. 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/QM6P42498304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41af31260f8185dd013e47803e4229767741a3bde867a63967a961fe924396e4. 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/QMBZ92463413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab7605e167a85f66b4053097dcdf6815712384a259a11d9cdc7f12afa2c82d3. 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/QZGLM2515627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17731f95e4c7e52cdc5a2c833cc7d004a351503f695e5a075675a689ae13a69e. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZMZ92504999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa715ea306c894319f88d82adf109dbf0fbf0c3bd5046591ca110ba553cc6cf2e. 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/CH7812529747.