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 0xb3410e5e52842a6520a67cc739e762b4642accb866dd82e4a92614790b8d4e1d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac640abc-3e26-4bf6-b83d-9cb495835772.json and https://artists.proofprofile.net/proofs/artist/ac640abc-3e26-4bf6-b83d-9cb495835772.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 0x0c33f21d92754bd4ff459d059e16f808cb9dde3bdb8bad10d297406eb3e2f617. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:32:45Z), 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/QZMEN2335534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d5fc1e40c02c15380e215d2fceac00b424e9d055ab3499ebac280efe5b9b26. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:27Z), 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/US38Y2436063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be4dad3bee10109301d8bd7aa92fc8e14320d68ab058ed9343e315c2090941a. 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/US38Y2597793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ca8f7817833beec85f7cbf3b176aad7928e275d9880bb389850c05ce1ba4c5. 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/VNA112000158.
Anh Chồng Quốc Dân Của Em (feat. Lăng LD & Rhymastic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5846c465d724f25d550db65979462c7ec33f80b5aeb735c140e594f134e1bc3. 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/VNA112000355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb761d83f5279c75c12a41593819ec2c46a67a84ada33f4e6cde22fa52c198f2d. 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/VNA112000128.
Gala Nhạc Việt: GreaTET - Thập Kỷ Nhạc Xuân
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a01b5a133f98e0cbdac32f807e060a48a0e5ebf95ffc851437694ac6226b358. 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/DGA092208004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592148fd67b518e9189acdb3dbf52c11ddfbd34ae6bcd480d6a7a80baef267b4. 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/VNA112000312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5319bad209ca7a1b33524608972ea5992138993277c636325930ab6d78f143fa. 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/VNA112000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97789c211da71a785d02f115fde6710e423dca263236eb1b755c13ebfa8649b6. 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/FR10S2194304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d94222a4dbb90691ddd08ffca1f827b6d5f208d9b8b1a3acdc420292a73d3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TBDK24012022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d2f5794c3453b4ad7e75b7b401a37f4c6fb70440e67a9ab49cce0f13fc1699. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX452003320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40d99015f89f6e347d0e985de6f051747d10c46b298a45ef21789f560be567. 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/FR2X42430028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5a5877d626808bdeab4bc14d08bb6abd4c7f7ae0665609fc4b9b762c63680. 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/TCJPC2468919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed8e1437d47190072c4cdf6ab10a9f33742efa70ac88564c4db4ca6e5b277d2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BGA471918816.
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