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 0x5d32d10dd4f5425bf557f5402e8cb96ae76a88ee2809c859f518ff2e22c049a0. 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/2c8d6935-5e76-4dc8-b201-dd6878f42424.json and https://artists.proofprofile.net/proofs/artist/2c8d6935-5e76-4dc8-b201-dd6878f42424.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 0xfcbe643330cdce6a3baf47e2e5894b9d620d7f45b5650346cf661138fa1b295f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM4TX2474776.
Điều Cuối Cùng Đợi Chờ - Tình Khúc Việt Anh
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d4a4f19199c386ed3f3bbb6712fb023133aad05af5b68bb3360465942bd0dd. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QMDA72234286.
Save The Best For Last/When you tell me that you love me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f49045c6537413b73c71b33d1d0f1f6fafb2faa3734e05033971e3ac92ed447. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2469161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003a747010a177733e312e812c122e8dab0c1abd1afb5dc9f75e62c1c842341d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM4TX2470547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2047a1cdd36082e3b4e52f72d36c501fbb82f2f20e04027ef6d6b7083bc8f54. 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/VNA0F1723500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802e9ec1348aa29be395182d8ac811743d7cb66e6041552d3f079eb5c52f4845. 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/VNA0M1806732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cdabadc6ea30368bfbe2ea18f662ac86572e3dfa23e57db5433bc7232077ca. 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/VNA0M1806736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015f04ac18743b9f93af9373c0a83babb4217bfd224214e5ae7a14458d18651e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/VNR011054063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d9b2748782231f2c61a044b4d349b5dcabdee92fd28149c4b71b1889a940d2. 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/VNR011054070.
Liên Khúc : Cho Tôi Lại Từ Ðầu, Quê Hương, Tuổi Thơ Tôi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e0aa171d2081f7fb50c2b6533d97b1d5a0ed62f9718f9595a1165a139bd2a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QM4TX2467798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2949a32a121ab5fd8b5ed0e28665940f0042b18c2ccb124292197d2bbe480cf2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM4TX2474684.
Cô Gái Đến Từ Hôm Qua (25th Làn Sóng Xanh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabd3b893947ea1cb594ee423e51435fdac9f1dfbb883946fe6e409b17c26143. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SGUM72301681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ace1011bad5f5563ef316aa0c041af143ccc495347a1e288b7483d5f3a227. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SGUM72400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6974ae920282563c36d887f8efb3a2ac9f7cd1bea610d65d21e699e4dca46ab4. 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/US38Y2408577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9220f12db47f4b0e71648909b2d3006b4072bf7aa6917e631c0a9ef0505406. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QMBZ91913487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9319b5ddd7fe9d1803aee28aa8e1bfc0154fffd8844d8cbfb47dfe66eb3ada60. 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/FR2X42483709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102f9283627a9ad4e8906401bdc0b5b81a4006bb7bb6e30af61b5d417de9e014. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/VNA0F1724643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1518871c164570df9dba85b8123c9701bd2a186c4c1476a614a63d86a53c45. 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/VNA0F1724647.