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 0x1cd9252d66eab06b40fa5dc7874deaff4ef48dd2ddc474d4eb56a01e9193eb74. 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/cc684ac6-12f6-441e-999f-88c18d96c6d3.json and https://artists.proofprofile.net/proofs/artist/cc684ac6-12f6-441e-999f-88c18d96c6d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hành Lang Cũ (Hạ Nhớ) (Rap Ballad Version)
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 0xe1e27dd2aa9eab6a4b5ef43befbc6c1367e23896b34fb9dbf0915f202f0ec32a. 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/VNA1E2000003.
Gánh Nặng Đời Cha (From "Bánh Mì Ông Màu ")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b63ec7ce58a3a39617912687b95dc5dde54880d1ff61745edf39a005de31c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62222935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0517e037268873b1194a578873c6c48fd9f5280f634c76f16173bebeee86bb89. 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/VNR011131676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af5478c2f80bbd943d5bb345cb597bc7ee7849f59b496e7818e3412eaea39de. 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/QM4TW2391417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0700b6bf2d6280790d52caef944ede1ba2cb013ec2a1b65f881e1d849ab71ae. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/VNR011132998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecfcae7107621f7d49842546b13f5354c6415755de681e089561ed392d192fb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/VNR011133004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71f3db56b40302b9ffb91caca0363fb51bb786fa8718f99d57804fa2b0874b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/VNR011133221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d44493226c60a3866b461f87d21fc074bfbfbc4a42be97b524d6b098898247c. 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/US38Y2420053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eb09e4fc2b4293fcfcb60b778bc6dfa63bfab7b5e69303fb4b899186c4e594. 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/VNA0R2401124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc5e940e653dbc1636b456fe38fe886b74a88114c7f7a246dbdb1c91ab2b249. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM6MZ2592173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c750982bd98cdc19e1fbb11eab2dcf87901950b322718c9eb79ab7581a9494. 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/QM6N22591370.
Có Làm Mới Có Ăn (feat. Long Nón Lá & Hoàng LV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc972a08db631bc19d1871a248d5fb7a3c5f4c4c7297c43f544b27a7eb4e0c8a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US38Y2417305.
Nơi Ta Sống (feat. Long Nón Lá & Mikelodic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6b98f505f9f359852af88afed14e5a8b352609472994d75f246354c7730065. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US39N2309948.
Đất Và Lửa (feat. Long Nón Lá, Anh Tú & EVY)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d7a219afef7fc5ee96793933db6db3dc49e020417dd322baf1c6d7974fffa7. 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/US39N2307747.
Nơi Ta Sống (feat. Long Nón Lá & Mikelodic) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656dbcdd356b8307aab5e385993550673735a4778843066b37e90a26fd38e6cb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US38Y2415230.
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