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 0xcd00849fb1ebb209c698a6fecebce93b674130f87d7cd7c2fb149809a7737604. 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/4e23e3c6-0a52-44ca-bd45-3aadebdd0b4a.json and https://artists.proofprofile.net/proofs/artist/4e23e3c6-0a52-44ca-bd45-3aadebdd0b4a.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 0x215cee3c96e00967bec1b78e44661c01b286ab026f314e250f4160794343ad99. 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/DGA052443744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb41a04347555662be5168ac1740b184687f62f8bc14c8b5ba28f90efbd9821. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DGA0M2439265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d53395e49359b83804f2020bb35a3462a16b6255e5556c657830a16f7d0e93c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA0H2423279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07090b31b0cb6a236a8d7f4fa6a26b000ccb5274f79807da239727fe0518636. 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/DGA0H2492395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe674b852b062a642a1f07261cc81d1cd1ed246d98b5e63bfea434998f46140af. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DGA0P2405454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a7406ff0aa100ebd90b6922bdc98d82325a1d7073da7a7303bfbfd2376e6ca. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DGA0Q2411583.
Thiếu Em Như Trái Đất Thiếu Mặt Trời (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46e6385f1a1780e72f736943397f26f410aefb4910ae56916601f7f96252378. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA0Q2429582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84060b2db5742812441eec17e28dacf33a6e3985651d0e87a58767bc9ce4820. 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/DGA0R2442649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e6790ec14039265cc8b350b955b9d7cdbc05135bab489847a1aa84811d33d1. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/DGA0R2484123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b4a3511c5b6dcd77e985d075ebd0e4c99ee2961023b4c0036127fbb620c94. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DGA0R2484124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8de903f38ead1afaf2b6ca8612de6524e84135a513be3eff8096b5e2769ab3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DGA0S2428394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38164c3aaf8ee9de115cec4d6c2b6d7d76997b976e2e31c3dce6c5f89e1294f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/VNA1M2401720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ede31d6339d762dbc49b9c82e4d5657dad4df3bd6c540a7ded63bf0033b38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/VNA1M2403993.
Thương Một Người Mất Cả Tương Lai (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc8596f07f5af74c6fb4bbac9a8faeb9b7829eaa43b8706e0b341f9f8dc4493. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA062541319.