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 0x76a63d3a6883c34c937a00cf9e5cb3f4768f928b125d611b897238ceb7883990. 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/f783c3a1-9d40-4ddd-86b4-bbe9e6fa1055.json and https://artists.proofprofile.net/proofs/artist/f783c3a1-9d40-4ddd-86b4-bbe9e6fa1055.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 0x6bbcbd6a8bafe27a30835e2827712286cf8db7281db903971b55d29db8d1aacc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCABX1483478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8868f9ff479ef606d7627e57abc04d73078972f57a4a531e525bc1358b9485ad. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TCABX1483483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b928dc96fa509af84e2a6dff5064f0b809fcfc5f1d56e679a226f771565f268. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QM7Q61500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3307b5a537fddfbad5b011007d46c802ca737f9982606999c9f9aac03c781631. 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/QM7Q61500706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f621f01e2270471eb2081009cb975748eb7dc1c3cfc2be1eaaa539c3df591f5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM7Q61500708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d743a2db02278977978283c79ef73c147cf8fd4bc5f6650bd1739cb3bf91834. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM7Q61500709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72218d134818fbee1218570789a02190174de82b274cbdd04eed55943894cf76. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM7Q61500711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127929e4007e1c2b82d7de3ac1e27594fc9bc5dc0841a40bef47ab9daf22abe4. 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/USETB1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3afd6ccc7aa142492725ed8c22db7649fa58206f9035ee52b11487f2c345a6. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USETB1700368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4368e08d12f356e5a26417a098eb754f96a8a5ee52710f1a828116cb86858f40. 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/USETB1700372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db5d3d347061de39c21f146dc76b0e161fe9238f6d7f255bf57387d8806010b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USETB1800288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971832e68cf127e24920c85d3182a7f6304963838d338ddd330340117a567ed3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USETB1900281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7578b9d706ce03703cadffd98bc2e65c6611018db9a0e3a459c14a85cf76871a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:34Z), 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/QMEU32123278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd997d1275068b11e66f81eba79a2c4e1f6a5832dac5061dda5290d010f2a0f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:42:19Z), 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/QMAAK2447160.