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 0xe69e74a9bf741b0e5816f32d31bef580bbdabde2188fff6093ebb5fbec89e723. 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/7b2565ec-d162-45d0-8775-bc598fb767f2.json and https://artists.proofprofile.net/proofs/artist/7b2565ec-d162-45d0-8775-bc598fb767f2.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 0x70de71a73d4337c37eae14f6509ae6f979c480065d2c4bfd6c6958b894395b6b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE3OH1510833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2f1273a0c0f10c0ffd8ff6ed559e26eb78214875807347a607edcc6bdb446. 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/SE3OH1510835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b09f396a59ff17140fa07f32ee5bf82665a93e189339c33390eecf222b38cf5. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NLS6R1710426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7709af6b76253c3fe0ee28f6002aee910c0a4a9c02f93b32637468b828b9ad3e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DECE72001811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb958d221ae6e31f9c94396e5eb3645ad474fbac21adfb9e5c81505e21e8e8501. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DECE72004931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ce6329657fa01d38aa4a979784c46527cfce94b72410dff1d0e2f1303ba16c. 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/DECE72006746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d104db7f3bf66fa3a5ffa1bc5df45bba889d5603f9d10cced5a3796eab500. 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/DEE862101112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01823f2475b59301cbd698533e9313e4d38099997c77f27602e55a8b95ff7e4d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DEZC62216712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf432dc961e10d8366b115a643dd0c9c77d67a1bec22fea8dde9fa21c563584c. 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/DEZC62326605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7846c4cdd186dc8c393d1f917520fb8a77bb29c63a79e900fc149fc07e661a5. 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/DEZC62326949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b62f7b1c2bb21c5cc4353c22f3694fcb0738783022189cdf39ee74994e5b0a5. 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/DEZC62326951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bb729383e16b6483aec64e7e2cf580433eda225661bfa0edb346f0efaffa1d. 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/DEZC62326952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7102cc1a95fdcbace1d14e74d2335770f59663f0ab3c936b977e7c52beff1905. 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/DEZC62326953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6950964991b2dd4bc536700cb4c4c94d7ec803f2051735f6fce122d269f32ff. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/DEZC62326955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b47fdc0d929f1714326b5d26fcd568494f85f708fb9c50da57e6162682d88. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DEZC62341180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf600db278dce32bd0e28383426b96ecb83183a6539ef32f025b89e81d6cace4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEZC62407710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1f3c74a4c2b0f42f661b5008cb190553b0eabd10615da506118d393e66196d. 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/DEZC62418031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f88c3750d0ba2bc2a8625aec9dec2302f316403f97d037e006f7531e1cff81c. 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/DEZC62435954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d104db7f3bf66fa3a5ffa1bc5df45bba889d5603f9d10cced5a3796eab500. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEE862101112.
Playlist (Premium Edition / English Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d104db7f3bf66fa3a5ffa1bc5df45bba889d5603f9d10cced5a3796eab500. 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/DEE862101112.