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 0xfae5481c6b9b7e325712f13282fe856aac77e8e5c8f768a6acc6909468544490. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01012b5e-de9d-4a10-8af5-a5bdf101a66f.json and https://artists.proofprofile.net/proofs/artist/01012b5e-de9d-4a10-8af5-a5bdf101a66f.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 0xc06c9d601f29a22a2a4bd6a16ae48c9e272347dee7c198b0a3ca3b1021f8d9d7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWW531930001.
Kloud 15 - 天国 (feat. Tipleso & Yellowshift)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37590ca32fbf67ab45c73ef4d6d0a1d901d36c1eb5e86672706a6235af698c2. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/TWA472376009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af167dd2589c9ab7f688eb814cc2963f4c98fa971adbb24dfcafcfa06d6895c. 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/TWA472576001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e2d78c13b8a3e7e7522864968be3531f516ec24b913890c727e7753a3e6a07. 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/HKC652500434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c11b68b76b87e3b9c3fe3dde78b3b18724d8669f05028c98d09ca94fc0567f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/HKC652500432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202bd3d78ec3604b76794a589d47df2b7494e7ae29be9182eb437707b873668c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/HKC652500435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2294839eb8b7a1de30b56d52208a9a6cc57debfff545e4503e8010146eb15a69. 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/HKC652500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdba548a89a9d9d190acc2e58902b68ea2c325616e0db5cd3ef4b6538af6984. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/HKC652500336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04313d87a6eb97ae6dee8141cb60b78f58da9719bf138221e6f4adbe514c3a5b. 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/HKC652500370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67974f79f14c1a34cf95ea6b3c47be926b85775029273af9703c5c886f2bd2da. 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/HKC652500390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc77a550ffc05c3d9dc53ee9cf7c2e7c665a9f860a1d243963b91027af168cb3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/HKC652500437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e257a1d81488aac6f6287b69d3b055bbb909bfadb55d6f5940cd977929e11de. 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/HKC652500438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3761ee3d8f14ce01c55de1e9dedc3deff769fc4d411fa667db3401d017fb23fa. 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/TWHM72100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407bdcd30cb06f834179295ced202aa07a355e3e837a10a50dd7d0c3a9e776dd. 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/TWUM72100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd787b001898566246334449f866ccaedba356e7051712088a5033793af4330. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TWAE31902345.