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 0xf86f4d618c9d70abe192544d9ee1fed82e17ee4716dc53a921c63e52189f2c02. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86085873-5559-4923-b6ff-e32255b4933c.json and https://artists.proofprofile.net/proofs/artist/86085873-5559-4923-b6ff-e32255b4933c.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 0x0850eff40fc85245cb7f42608dc37691fa27a3ff5b2c92db94972029d17bb090. 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/US6680918669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dab322202b719f7fb7bfd85dfc24a0cccb2f2cdde71eb34d82d4aed1cf4f79. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNWQ2028415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b76afbe6b1092a96ea7eecbf0dfc603a176dadc1a5e2823f5708ff2bd5a52f. 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/QMBZ92441189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9d45eb8c9c09159809ebdab403254c760c3ebe337ed97a04b0fdc82022f4df. 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/QMBZ92441190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7792210230c12f0c87fc3cdebeb80190851672f7d7eae149d8a38341d02129b. 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/QMBZ92441191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10d2f3840b1f7b49b09ff977081f0e62808f4c5cf8eea89731a36efa0b4788a. 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/QMBZ92441192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90a22f8746dd2df63e7123ac111cb6c5acb176aade2be8875bf07bc6e3628e0. 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/QMBZ92441193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb86e0f945e188122899c9dacb8c49bc40ab9c3d54dc9307b2517c4bf0002e49. 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/QMBZ92441194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50258a4c06006d63f08ea4c520275da68c41b23647c1b831c6b6f85bc519befe. 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/QMBZ92441195.
HAVING MY WAY (feat. Abe Linx & Tully C)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe444350890eb293b8166f6b38750778077f9cadec70a5481cfc4c746a7cadd1b. 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/QMBZ92441196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8a39ea8cc592e756fb9ea086e99e9a3360b7f226f3e6aba2580cf5df52a22f. 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/QMBZ92441197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b5e4cb58e5c0f323b5633303a3a78063105b23d517058dbb8c6410218dcd49. 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/QMBZ92441198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5a1f685ff552a1d1c5c438dc55899809ac5ad14fd186ea7e5fb1aadadf009f. 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/QMBZ92441199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95afcfe545661ebffede157e2c5d6eb4c40ccbf03b93a3ff8644b07fb35359b. 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/QMBZ92441200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2919cfc573a010a171467d958700fe391a87d20aece9ea4d0e1f98431000e1. 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/QMBZ92441201.