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 0x938816320099f96c57ecd1e0abaad6edef85a6a1c86bf98e0d8815de861be3ef. 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/0b5e0999-22ef-4c71-835b-814c9408ae00.json and https://artists.proofprofile.net/proofs/artist/0b5e0999-22ef-4c71-835b-814c9408ae00.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 0xa89305947752f20326c58a9eeadefbac8c542d406acf8ba9fe0aacd907975589. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QMBZ91542450.
Phan Đình Tùng Hay Phan Đinh Tùng, Vol. 4
Tuyển Tập Instrumental Phan Đinh Tùng, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ad66ef9d0778b446dbdab46bb49ae82794d8e94b1caceb67e82f1fe5ad937. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USJ3V1086340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590838eb157bb979e96b75999062f58437bf587aaecf3d4abcce6cf4bdf876a8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USJ3V1086341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9b1710abe79e3390c2fbcf75779464ff7d4b66092e561f69734096cf41a8ac. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SGUM72200550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210ff9f876bcda70ee533c50479abe319a14ae6a8b3b34be77db1c4bf6c5c1ae. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/SGUM72200552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8bb00b15d47b6f3fbbb22101c25783823f0f61d1e2fb811ea9ff32de3c63d0. 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/SGUM72200574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeeaa9a85609089104ea4af5f8a42b12bd53bd909db02ee2df885a5b4271b7f. 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/SGUM72200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e4b36525f00bafb23d6ab13440c7faf6973ed6dfef4743d0f6ebd0c36e9332. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SGUM72200685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635d34f5cd7d40bf678782335901ae5d7ee28fdb118ad2a3d60855d9db27d2b2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/SGUM72200660.
Tuyển Tập Instrumental Phan Đinh Tùng, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595413df22860a5529df9be7e35a74658a56fae3182456ce8908e40efee87a46. 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/DGA062511056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31840796a77073401ccdfabbcb55b51b14d25788d5120ba0db19b390db95aeb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DGA062599594.
Nguyện Cầu Sau Cơn Mưa (Tôi! Người Việt Nam Special Version)
Nguyện Cầu Sau Cơn Mưa - Tôi! Người Việt Nam Special Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026bd5f197e4c54fc3f276aaeacf1a2592858d4c9eb3ed0beecdc7069f114ce8. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DGA072509294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669efc5e8d281b34c1237d64259dfe73ba53a3839241cc6a427fcd38ad9c6922. 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/VNR011046885.