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 0x68117c3f22ed1754a394cba96f829b4ad4ff93c6cd8d394c594070c73b996edc. 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/0d372041-5c70-4deb-aa42-dfdf7540ceaa.json and https://artists.proofprofile.net/proofs/artist/0d372041-5c70-4deb-aa42-dfdf7540ceaa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c8c26279ea52f337f783c28b1065fd69268e180263aaa5c308b959cc080584. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/VNA0M1927674.
ước mơ của Mẹ (Colours Version) [feat. Văn Mai Hương]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8b9eb28468dcade767b983644640565bb70d2c97b10c60d3c501478b77faa7. 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/VNA0M1927678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49329c72632d5abc6db1bc2d42524515ed645bfc33828402f5e282a48195ad06. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:59Z), 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/VNA0M1927681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd2742460a1913658b2dc2264d584240447cab7bb73ef1e616888d4a2cbc557. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:57Z), 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/VNA0M1929321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb758810b50b2541250d71d677ac25e7469cd20ea92354ef9d308feb4422cf78d. 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/VNA0M1929323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4088e21917a66486dcb4e818ddedda050b55854e3fe259b3d4b51fd88b021f. 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/VNA0M1913037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff1507437e5d209f4d0fa9c20a3ae7b151d704c40907efb82e7ed3a8b213509. 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/VNA0M1923442.
Trạm 1: Xuân Hạ Thu Đông, rồi lại Xuân 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc4244e08d97853584bee1adb5d6466bffb2783c4c46e306ea8ce94f3e1e9ca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0R2000813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700a7190893401fde499c3996e1be0199eac259a8304f9188aab004c1b928664. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0R2000814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5ba657cf3afe5bce934eecaa01f8e515e56d8ff9eb88361d61c7989a67e19f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0R2000819.
Anh Nhà Ở Đâu Thế (feat. Lyly & Bùi Công Nam)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5ce3f26b8a88f9cd7769038ab6ce51ebf130886ab67ef1769e92cb6b81c3a7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1912384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333469e1822b31e190b5f7f02cbf31466ac67f0cce13ce48ed6749bd15f8f720. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0M1912388.
Sao Anh Chưa Về Nhà (feat. Hứa Kim Tuyền)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb3c10f4e1428b9b3ba9bcf74f334a625f6a8c52f1529e5bcfcbf496a2992f. 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/VNA0M1912389.
Medley: Có Ai Thương Em Như Anh / Sao Người Ta Nỡ Làm Mình Đau / Không Sao Mà / Em Đây Rồi (feat. Lyly & Bùi Công Nam)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f906459f11eec454bdc25d1d17d1a0cad72754c46d044d7676fa0e90d77d4a8. 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/VNA0M1912390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982ab0cadf8fa04aba8b3f5bde7fe1d6a525190be35874c3f5c7ee52f674391e. 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/QM4TW2407510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34051016fd32ec06990e1f1dba3642302e2f9d464ed6e632945831cf34dc396. 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/VNA0M1932134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121778d148b37c816cd3f5711f577792143e38b1ccea736e2b8c140072140c8e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0M1932725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4126cc5bd45abed2973abdeca048f0240d1474ddd28639bcc76122a0ac9a6cfc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0M1932726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d6dd519398792851f3a895325e291ed3339f7d3522e9e77ba25e3b119375e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1932727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3214f4bc89c1557d629d262ccd95d3ff13881832e2e772ab4a2ab4e84dd4480. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0M1932728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717cbe41aa4b3788ada6489915d1876bda37e9250e7ee7cfd82683303ae45115. 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/VNA0M1932724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34b0f818ae3f734bdf50810aa92af6cecc57450e8d2e1707a9d6bb4a8384d52. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1932729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a9ca329b5b598b6b4cd39d02400e6090528f4f3da914cf849731dcb563341. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SGUM72400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717cbe41aa4b3788ada6489915d1876bda37e9250e7ee7cfd82683303ae45115. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1932724.