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 0xbe60702f82c418af51d051b6e226bbe87fab7528cc8a0cb04b88caf124bdef8c. 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/bc0282cd-aadd-4c8a-8404-0994ec8c0144.json and https://artists.proofprofile.net/proofs/artist/bc0282cd-aadd-4c8a-8404-0994ec8c0144.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 0x4e2da20e2755d039c4abbce39ec8502ba1f84d1266c3b512b8bc641652b4f353. 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/VNA1M2291699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc741c6f137cdcc8f0ad847d91d9e8ff75ce473ba4e05ae9aa01be4d937ccf9da. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/VNA1M2291705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7095cf0f338c438ea3c35d43a8a90d2be030e62b6758372497cd913fc9ce071. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/VNA1M2291853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f513d0cec2c9398a5dfd4dd0a3ae610b53e3a1bf1db50246107e97a16e252d9. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/VNA1M2291868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5490aac84cec19b3dc923ccd1ad58f7b9dc0be5a8abe786b38ae7ee5dd279a. 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/VNA1M2291861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaa015ca7e6c1c2c79f274b4dbb10d10c7b45e72e8d3d554eaa905edd0457bd. 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/VNA1M2291889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d472d52091c2c76813888a5a66e90afbc52c5681692b5c6d4908ad7fbb26344. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/VNA1M2291813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb144c9b5801b4ca1bcd0fb05ac6bce4847f18128beee0b57dadaa7767595feef. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/VNA1M2291825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee4f454d2cab46a43ad900b12db748e3ee486291c345f5d6d441d9c053f2d56. 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/VNA1M2291834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfe2adda038ce4329ffeb9e367ebbaa006ab1f5f1cb9ec1fcd78bda8f58c28f. 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/VNA2F2402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1df2f1a69163b8bac06e366ed70ff215eb3902390e181d8d004588445d2f3d0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/VNA1M2400689.
Đừng Nói Lời Chia Tay Khi Em Vẫn Còn Yêu (Lofi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003eaf085abe52aa16c0abe3752421185f5d50500eaf7a19486161a42128873f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/VNA1M2400693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7201d334b80332828b0565c53e71599e9d5824cfe44a2e94c23454dec3d5165. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/VNA1M2400687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0986b565f21c39d895a8d2c5a7c7f45554351dca6760f1e2dc05ac36b784f855. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/VNA1M2400679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8107c758db0ac9a2546e2f680e8c9fe52b382543f1be266572cddba0dcb6ff9b. 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/VNA1M2400711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef9f25d16f2457b0692867d47729ba6c94b1e2c5f650344c36fb1c009f59e81. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/VNA2F2402827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c081fc607bd93e00e84d7fa7914e83d242c812539bdbe159fd926de8a84bb9. 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/VNA2F2402826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a72924cf4e9d9130cba81742fbc75e9583cf78ce9879f50c32a7669d545c075. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/VNA1M2400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ad0f36dbf7dd08576572ccbcdb070a46e78d79d9afc01b352ce6f4ed8af2a6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/VNA1M2401433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9835b68bcbacf8bb7ff4a879f60907bb1db47ff74fb5aacf49241b99468c4a08. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/VNA1M2401740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974467c0f8ea4192fa113b6f4da1020b4f6f79f0058f6221c1cd404e77399a3f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/VNA1M2401749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f46d9ce84e55cf67098ae3c9180d374588bd0a853ad7b912dbdbad8b2104cf. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/VNA1M2402021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b22097d99393a51ddd48bb91ce417f80bef19857fa780bcb7caeb8723f1795. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/VNA1M2402242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a04863e031ea268e8564c6278d3aaa9e6e761749d6d5f7036a06c0ab244d0a. 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/VNA1M2403687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cbcdeabadd23412fb5f3b91dbfd0af3c03b70eff1b0af7424022999e8d2aa9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM6MZ2597854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9bdbb5793e800bf47bd0b5c5a12cf7e96bc59f8c3c614cc45c37c93d7709c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6MZ2597500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9957b62a93672e2415d18c6c538a387f277bc7a6152ffe1a7240a9d1f13255e0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QMDA62501839.