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 0x971eaa9816ce443279e951e10882e7cdf5cd4e5b51ca043a58fcac73ceada959. 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/e6813998-323f-42dc-a088-5549389a03b3.json and https://artists.proofprofile.net/proofs/artist/e6813998-323f-42dc-a088-5549389a03b3.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 0x471f5d125efd23be3ca89b119f1a6e5f546e6ac91659ed7a9d8667cd6610731d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:59Z), 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/FR59R2206844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc519609ba1ea8e5d13b40681a8bc7a991eed9d56212cb6673d9b3a20e423a91a. 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/FR59R2292002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dde8417d2c8b3d6eb6bfd45231659af254b9208d9490620b13b95f7f202d03. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR59R2292004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b1ba4eb1c778a36c5bf1f7b64b5059a709d832c832a77be1f1a66a764be982. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:27:16Z), 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/FR59R2292007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f30f982cfd25636003b6b4ed8d442bd8874591061887fdb62a7b2ef521d335. 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/FR59R2292009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c8610f49d38b7d2c96adcf9d811fbf3f9cb48eebcb4284b6c09291bf804329. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X42234700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5b632559a580260d72883a0bbb7de68eee8ab9f740119b346a688aa29584e1. 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/FRX282011591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac09e94fc23a939b3cf57380165ced0ea68eb625c7441313423411994295844. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FRX872333376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac45479bfd66d3fb0d47cc0b49c7a345f85efba6b254350bc3576c91c903e750. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:35:21Z), 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/FRX202461100.