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 0xb92faad5e1e8343485969bc14918e8e0cae40ebc0d329ae1b4a2e1e854874994. 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/2d06b025-b0c1-4386-8061-7af11be49632.json and https://artists.proofprofile.net/proofs/artist/2d06b025-b0c1-4386-8061-7af11be49632.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tinh Music Platinum Series 36 - Tâm Đoan - Mây chiều - Sớm chồng
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 0x14ff8b063b3ea53df16a693b76a04b92bec06d728f15ca7877432fc58bea5af1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TW2085800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef7922f5176e750d54604e6c667207dd13c73156403eaa13c7f57882f0861d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2023544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f4a5a2ade0e0ff5f3595a24ccaf9a2d1c7dd33ff49b6cdd18f06cde751ddd6. 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/CA5KR2023550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a12868ad802a526b80d11fc66e8715d46a2e38da819a8e52d30e1f0030b48. 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/QM4TW2091768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b1071e7e5e77f110494d455c6af1013e75e91f75bda5c1bd0680604e52b173. 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/QZGCD1805376.
Tâm Sự Người Lính Trẻ - Tình Khúc Trần Thiện Thanh
Liên khúc Buồn Như Phượng & Sớm chồng (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4da3cf6e82e272be2d18c71e99791c975fd997ad0af53dce37ab583b7fc5b3. 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/QZGCD1805584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5826f9d77ff8092e98650529dd69cb003c4735890f447130e99511693895cc. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZGCD1805585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fddf1193b94ee3c07bdd300fab44f364f777ba238c6c1ee8ec31376c8559670. 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/QZGCD1805586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ea704b36abe37584de4a424a6f360cd0d429faef5447742533f64555ad5561. 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/QZGCD1805587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630b4448962ab3a4326b17a9abd3c708dbebd79de6d9f9823337452d3a52a584. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZGCD1805589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484914be34bc37aead25e5a5f81a9e95e79047d02b08b6099a19f19bbf3b592d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGCD1805593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e9102bfe2ed348613e767bb0df53941bdcdeec79b6ce6fba726be8f51feeba. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CH6540853264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1aa7af2286009daa1ac3e1db024b5f84d86d6b472ec23618d9963577e146ab. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM48F2103904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1b3f0b3d0c3a7a731387aa802ad976d56fe367ddf694a517d55aad5e38a776. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZGCD1806273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b211b21fac4ab4875e122240128d79a47952d8573a75ff6fbadadd8e0e23224. 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/QMBZ91911662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b34978784d552e7d32addbce1bda5910e2e0f3e202b3f6b00632b988c9e6e6. 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/QM48F1556107.
Trúc Phương - Ông Hoàng Của Dòng Nhạc Bolero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2af80fe9c10eccfc60d3c79624858519f209fb82eee8cc2d4a40c38061216d. 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/QZGCD1806015.
Saigon Nostalgia - Sài Gòn kỷ niệm (ASIA 68)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21afc5cde275c0d75ec2eff734a86e6fb9c319c08ea83b3aacf437bfd4f276ca. 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/QZGCD1806153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacfd2916071204009fb248e9cb1fa009dfe82432917088e06227d469068fd39. 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/QZGCD1800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f963d8d1e6d579bacd9200c86be2f8f69af164f844dd8e08ab8f217fef9efc7. 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/QZGCD1804250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a010e5280b2b8a30f1e3f1df98fd1091b220358750b4325bc33eefc15582ba9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZGCD1806177.
Liên khúc dân ca: Qua cầu gió bay - Ngẫu hứng lý qua cầu - Yêu nhau ghét nhau - Trống cơm - Ngựa ô thương nhớ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22ed949dfb94771ada87ddda5a7c5f483d7b7cb3311af8c0ed36560ca67be22. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/VNA0F1767132.
Liên khúc top hits: Can't get you outta my heard - Người tình ơi xin ngủ yên - Cây đàn sinh viên - Khi người đà ông khóc - Tình thôi xót xa 2 - Có quên được đâu - Trái cấm tình yêu - Hold me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f289dc59f44367307a64691138e10cfbfd372aa3a0676248e51327199db4be. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/VNA0F1767133.
Liên Khúc Đêm Buồn Tỉnh Lẻ, Những Đồi Hoa Sim (Asia 283)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfa7e91812f6cd28e9f99489457cce0d9c5177c3bb93cfd6e438a52725d1505. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZGCD1804002.