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 0x431e4e5985280d82ae50f96903ecf1156262be342d39764f3e023430e149eacb. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5981e216-0424-4f23-9952-d9e2fd16e8e3.json and https://artists.proofprofile.net/proofs/artist/5981e216-0424-4f23-9952-d9e2fd16e8e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Journey to a dream (Hành trình một giấc mơ)
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 0x5ceb9b8e478ddb77fab9dbc2531b4b97eafb27093c3174ba4b7c587125e8cb8d. 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/QZGCD1806038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc34be5fc96dba722804d39d83340fce4af32a22c6089d6de9175f9d147c11. 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/QZGCD1805936.
Liên Khúc Chuyến Đò Vĩ Tuyến - Nỗi Lòng Người Đi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144a716074e2e92be5bbc1854b89879ad316119ce86f839d38121d3d587f121d. 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/QZGCD1805938.
Tình Chết Theo Mùa Đông - Trăm Nhớ Ngàn Thương
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26d8f00b0c82da6dca3174dda708af97655f3e4f67896dcf3afce5f95fb25c8. 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/QZGCD1805940.
Liên Khúc Nghẹn Ngào - Anh Biết Em Đi Chẳng Trở về
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d7c44a7233ec3e7ea0123721dc90037ff9b745dd21ebe03d82d6ed417f73e9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:10:00Z), 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/QZGCD1805943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c33901a188aa9a6dbad0211afc96d96f6f9fb008c3d19d4df361fe0a4b50fa. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZGCD1805945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764ffd69b5c074bea3dc13aa072e0140087af6be6dee619b7a9c2b3654f646c3. 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/QZGCD1805948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516805fee5cbe0b7bcabd0aabe238f7b016a89eccd2b940d7a8a03eb162ef279. 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/QZGCD1805955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8f45d4d152fce61d644a267c90c923d39e021b1e83dc2aecd47451788d80c5. 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/QZGCD1805957.
Journey to a dream - Hành trình một giấc mơ (ASIA 76)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff9ada4c9acadff413b109d4ea40802ea3c47402ff70d8804ccd2a0026fd38f. 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/QZGCD1805008.
Liên khúc Ngày em đi - Những tâm hồn cô đơn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c7c7d0030806571c3136daaccfa209694ac726ac55a1cd22f7e5c09f074b2a. 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/QZGCD1805009.
Mẹ Fatima - Mẹ Nhân Ái - Mẹ Xót Thương (Asia Special)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97beec60fdc9b3d2cf0b93a8d44f84e83997e0aecda36923aa341a5718671090. 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/QZGCD1805811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7503dba996e52ad70c9b9976efcc365098c9ebb4b8cb91c43c0bccafd5a6eae. 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/QZGCD1805812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c94830e2ae9ef7c2a0f7e86fcdb5b4f4eabcde4300b67811e0889241d35afe. 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/QZGCD1805874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd1beaccc2d8c4450f797c806237546d475050bfc89e0d105188a6c982e2bad. 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/QZGCD1808496.
Những Giọng Ca Huyền Thoại (The Best Duets of All Time)
32nd Anniversari Celebration – 32 năm kỷ niệm (ASIA 71)
Tình Khúc Phạm Đình Chương (Mộng Dưới Hoa)