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 0xecafaf27061664a20f8a5ff140f30391a0703657f50f5d1a0ecc48daf0f0a58d. 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/077c5fa1-bc0d-4f2e-8a9f-86669d820c19.json and https://artists.proofprofile.net/proofs/artist/077c5fa1-bc0d-4f2e-8a9f-86669d820c19.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 0x2609bbfbb0d9567c774869f95e63ccbc87b84e29f4060d3b15df9c5b8cf455d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA0M1847594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8309cc836dd265cb69b8a48106d84750399aee4b0a40873146826fa9ca7f4bf. 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/VNA0M1847606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a0204aa78c53ec5e280f57c52ea6f2126ace228cf83ffe28281201f33506c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/VNA0M1901459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb008ee280495906023b6a0b902ce0e9f45c8dcf311239e3484b3d26ddec117. 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/QMDA72287895.
Chạm Thật Khẽ Giấc Mơ (From "Bán Chồng" Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0125255b600b8ce1496c3270e40dcbd1c80821a1bb95455bbd77ad7d56551d62. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/VNA0M1910019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f84f4fd1452ce568b272407522489e5be3720c148f958ec51518310a3cb17f. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/VNA0M1910119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f53e2574844fefe19d575b813d543d48de23342f5ca4e74a4ee00364ab2d8f. 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/VNA0M1910020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96ec3b32bdce6b71222e87d0df2fa7e2c2f991cc7ae9eab124d84de34eddb0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/VNA0M1907250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6796537cbeecf127564d330b7dc98d6af1ea3bfa0cc07b3c8b3f5e30889857. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/VNA0M1910018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb724170a8fe7c5cd343b7444d9c0d0c2677c27c93eb0865d57456afb529ca8dd. 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/VNA0M1910028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2c4783e528e39f7c746c17e1d66ed79363fbd822227711086fea8d3c9fa138. 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/VNA0M1910032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f2976707e142185421556ef2eb88dba054f2aacfa96b3e251e4b8bb6c62dc5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/VNA0M1910022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb7573f0121f71782e3881ad0b15b00e6269cdfa64c59bca4a9b9c19f38054b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/VNA0M1910013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b06159f1fb27e8bc37f61ef3c15fb793d12bcc1b6c27230ff019455f71e4761. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZDA72295972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefb75e9918a62d583360967f07568212d52860e52ca755c700d9cd3179f844a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/VNA0M1932214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c570fe68ecfbed508c89c244adb6b7de3a7798a6e63da38c92b94e63596708. 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/VNA0M1932216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d29bea9dc1d811b8479eb240e41c4c7ab6e2cd3919750cef68e791a5748e45. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJY2502655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2803a3b2c3c0b7be43fcdfee6ebd181ac3d2079f56fde73c6c52bc946411c392. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIA2483899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79634d59dbcf855cff8f1279b8c9140de620e88454387061a085b5e3f262b9fc. 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/VNA0M1908042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a44bb815777b294b57a87a8efee947db79319c43d8cb77dea5f25982711b01. 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/DGA092369928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05fc0cf9431d96b9355cd8fbd044db8442ef6d51e3d5974220eefc4394a577c. 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/SGUM72400393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa61676798e7d8ca3a2e615edbd6bd6ef6250b2a745a808a6afdc9eed00197a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SGUM72400400.