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 0xd2ff7bd0526714a32b02b2bfc5faca95a9d068ddb85079f66b26d25ef061137b. 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/7f0d1d5b-38e4-4940-a684-c59f73de665a.json and https://artists.proofprofile.net/proofs/artist/7f0d1d5b-38e4-4940-a684-c59f73de665a.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 0x0a3a279e727abd39a9ac8cc8dd2cecdb17a8696a388bd7b3973ba3638e55712a. 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/QZN882255208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793fd1507c907c7356f4274a7b7aff721b7b4b004a1de26654dbc88b942aaef9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZN882255212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49834bafc257f5e25e165a5c45fd7d2232687797891357546e098247697e9796. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZN882255213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c446cf67fd80f124a15a2b3dc2a0e00e35653b30e8c5cdc28253c7fc3a1fba6. 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/QZN882255214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53af50a3ecda698975abaaa41208987c71bf4e39c7a92e18528e56d57b8e4ca. 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/QZN882255215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd191ffdef928501526b567a84f8a20e599fec4927a014d320c4a9b320350dc4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZN882255216.
Liên Khúc Nhạc Chế Về Đời Hay Nhất Của Đoàn Lâm #2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b8c343988ff85300f184e268944bcce359488e3c326e24bc064ec827cccac3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZN882261786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04345475bc67d4c9e5bd8af437625279e9113ca39d91b2c75e5383b3ab86096d. 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/QZN882261789.
Liên Khúc Nhạc Chế Về Đời Của Đoàn Lâm Hay Nhất #4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5123dc657628e9950863c04ef42eb85067dd0d899a4d8a8336fd8bc0dc6454c8. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZN882261773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14496b3fa054a8c59eef21d3d46d9307028cab3a2846f5f658005b6340ffd04a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZN882261775.
Liên Khúc Nhạc Chế Về Đời Của Đoàn Lâm Hay Nhất #3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b9d8b8d4df7c8268c8764ee340fbc9f90ba0865bfc6c385d9ad54af4d9f3a2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZN882261779.
Liên Khúc Nhạc Chế Về Đời Của Đoàn Lâm #6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b80de5624cf3da639c0a43ede2a950bb80a8f2b549fccb5b346dd3f0f2fa18. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZN882261761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca0cd8cbd0a598093b340d2a92ed91294e1dc05b1531962e44c242214b0d06e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZN882261764.
Liên Khúc Nhạc Chế Về Đời Của Đoàn Lâm Hay Nhất #7
Liên Khúc Nhạc Chế Về Đời Của Đoàn Lâm Hay Nhất #5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced8c01db5edcffacde385c9330c4a63c5b7ddea90fbac74dddbff1d99908915. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZN882262005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70f6516f4e146574b2ffbad6afbe1a27254f911299a5b0c2e6501a574c3ed42. 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/QZN882262006.
Liên Khúc Nhạc Chế Về Đời Của Đoàn Lâm Hay Nhất #9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4e20d4316b5f61594b362f0220ef97a9808f0433f92b062082db56b9d417ba. 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/QZN882262776.
Liên Khúc Nhạc Chế Về Đời Của Đoàn Lâm Hay Nhất #8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e4d8c65fb49688a4f7c04c286ab13d0b0dfb8c4cf97777599e2296fe47ca7b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZN882262767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9fcf18117e8351c827eebdbc57a3c005406dc8dab1337c3f4052a376355ec2. 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/QZN882262769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d4b7d9293adfaec701773f0463f5243a3d63e42657bced43ada063538990bc. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZN882262773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273c4a9f76721549c02720cdd39dddccfa794cda2c5b1d6e0969b779dd95e867. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZN882262774.
Tuyển Tập Nhạc Chế Về Đời Hay Nhất Của Đoàn Lâm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2ee79f698b3259fc28e7595786b50e585c404bb53accd5e5229a2d041eb956. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWDW2210307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9665590721b2e23cf19e57a678e194d28f3dcc4c8d53321fad0e861683143603. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/VNA2E2310377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73d16db10ffa39e08ca6342f05bcd0b1534a4346b7708efdd63b32bddde3795. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/VNA2E2310378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f29f6507faf8f3dc3447d6fbb8774c940e8c464ece3a094208586fb37e99ee. 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/VNA2E2310381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54d7742988985a6a4600cc3fb7c2f6e9351ebd09747a53e4f98257c71ef6509. 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/VNA2E2310763.
Mashup Tự Mình Giúp Mình, Tiền Là Vua Chúa
Mashup Hai Mảnh Đời, Tiếng Hét Nghĩa Tình
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79977e215cea17b8fda695d7d00d6090d048c58219458169e18f305d24de1998. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/VNA1M2286766.
Người Thân Lạ Hơn Người Dưng (Lofi Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc676457faa750c45380d1b8ab4c39a5a636af79a60da01350d33b7c2ade718a. 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/VNA1M2401518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268b12de18e3831d449cae28924f4f73d7f488136124068ab6e58b52d1156965. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/VNA1M2403838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dfa090cf9c7602e38cc1c1fb1d79feed6b5dada5d758c95c498db4ed6351a3. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/US38Y2519697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed68650c1114c43ff91bd28e1e36fcdec1c5b55497cac26d4616cb7dd14aa02a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/US38Y2524519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640141da2208defa4a13808a1d3e43c2834a3a5ef6331e3e14146ad68bae7556. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6P42501697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68046f6c24f8c78d1f5a727cb0180e2a5ecf1c2bd015eea28eb719e533ab6700. 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/VNA0F2501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160a545423559bd4e35c1f4ca1346dd84591f40ca2c4458647677dc262765836. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/VNA1M2406499.