De Wolfe Limited (previously known as Music de Wolfe, often referred to as De Wolfe Music) is a British music production company, recognised as the originator of what has become known as library music
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 0xd32ed2d5e2591726cfd4fd7d0663bb65c4e9774230d1f9ff706da903dfefd01a. 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/47f42313-d95b-46dc-ba81-d2d66f0de6a5.json and https://artists.proofprofile.net/proofs/artist/47f42313-d95b-46dc-ba81-d2d66f0de6a5.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 0x67e49fdf8b3b0d1af51afdf479e8eaf2f21a7c5af1f6bbb757d302fb6e09994e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKATG1601845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eee0deea9552a835a7902bb447e1270939b4e743bbc5eca8933fc7b5e8fb98f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:27Z), 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/UKATG1601856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75037880992d63f95a91d8972b9fb813a1139c5c70193661dc85fa85bc175993. 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/UKATG1601861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fd0ccb2978d4fced1c4fc8ea04b4e3d14728ffa23a0301e5449b5575e4bc0a. 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/UKATG1545489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a113707ea88c9b64f4d43b34b89e2d6b3cc7c95aaf0ab2ca72468c880be0a6a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/UKATG2001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5498119fa2382b193b96bdfa60d860944e4b815c93373770b23231b5f3fe3724. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKATG2001091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d66bf01e0508d085e9b9b802da0148f55d60cc75bd21d130990ab49f5012edc. 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/UKATG2001083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba15d703e43f62bc1b5ba1fe7d13322e966f9d3e1053f6078883c4b5a26f2903. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKATG1544746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ede37836f3fff28e4d3965036fe83b38b247270c80857994a74eb84ef349861. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/UKATG2001085.
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 0x8c56ad07b76c141d8fe6da1f64f5478a122845e37c92158cb4263f142351981b. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/UKATG1544744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606b1fed74fcc2e8ff9e2b6f46b549de662b26420af045bf84e37271d22c62e8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UKATG1544743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0330352c352f8876f00e7f78b6bfce4bee21db9a65c0a78ee64cc69d2372c7. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UKATG1544742.