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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946aa1a8c5505fa3895f99967f96b1ceb907fae1b0710e81a99d949f3334f063. 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/8d8d385d-6607-4746-8d5a-a9ec22518f65.json and https://artists.proofprofile.net/proofs/artist/8d8d385d-6607-4746-8d5a-a9ec22518f65.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad362c7031b43ed46e89eb2c2e514a5f341a0577fc810a61204c1fad41fb7a6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USYB31818701.
Attention! Deficit Disorder (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ea5ae3e025ddb7c274a24d338db9755ad1e1d76702bee0ba208358bb7f571e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USYB32128704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe690fabe5ef5638652d5b6f55d321c06d2034ab6726fcc9f6cf44da49092405f. 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/USYB32128705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8aef51cd5eb90e24f1fd55ff355b0cac58deb803af0a246142e2fb017d70d. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/USYB32128716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be830056bfb39daf5dc80cbdb88b3870c7a9b2e5eee499a6b683e33f9369d86. 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/QZWDD2253320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b90a1714f9b65c755cd6e98afdf6381d29cf0b69251aebe9b62401f6fe1474. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWDD2253321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a0739d665eb7e16c27850a2e30348a219bfccc1e9251b3e5e9f8709d1beb93. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USYB32234101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86078a7e64b6c722b3cf545f845c1c38b188e56ae49045c41eca86b94f34462d. 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/USYB32234103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b8fca05e8bca764dcc290858b2ad38815bf71dfbd96214fcd6f6a46826731d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USYB32234104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd586919de38b91a40337cead199136fe54f0ee01efc933f39896c854415719. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USYB32234108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd84f987f4489f036fb609ee9ab598ff9dca4b78fffe79646186381e0cb5f1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USYB32234113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8f4fd169948074c61437967c873775b985802ff6e454a87176d214d12c9970. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USYB32234118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2748c760bea70bdc056a1f952023df63c7e3e6b364d5a5f39f8c79aa5ac39c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USYB32234127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2b1be585c985ac3e855af7b7728ef8ad7e7874265d70b49ca386b1cb2f3beb. 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/QZTB22440297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe393e2c797e9d10e42b70105327061ef70c4715f369cae57e54f672f14bd564d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFN2435790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41be7408e669bfbe1159d13c9af31b6aa488247963a8020bb968f5b8dcccd3b. 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/QZWFN2435798.