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 0x787d2abef3d3cfee799e4e7ccc91fe21d66cef3acff45cffd332a89ecfbcadfd. 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/50578bf1-b819-43a4-a86a-4552b7e7d35c.json and https://artists.proofprofile.net/proofs/artist/50578bf1-b819-43a4-a86a-4552b7e7d35c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
American Boy (feat. Meaku) [Kere Ke Si Ke Ke]
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 0xba105f3069e1bee753beedc15df3bf688e1d74d2efc21297e8d54825563b351b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/NGA602100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b79972822eb7d4ef1e464a200b5ddf7bf1b625da34b8567fd61a48c2b63edd2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/UK3AZ1512561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82411424afedb53efa43bfc5ec92553f022d4fabaa5a8ff488e0e63b7e1618c2. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GXBDS2350757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0bd4d9ddc69a0fa1381955ce87634425d7b58216ece0d8dcf7126e3b92908d. 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/NGA602300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e9556ca785f65e3f87b80c0935cbeea41e2afe597092248d4a2bbd0660ba76. 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/GXBDS2396597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f66c6a4b59f5a23bceaf79a69a7ce240899553764b8f4c3fd8610de50b238d4. 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/QZNJZ2466006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1a1b488601bc35e4cc7f62a40c339c26d52c10adf8fd049258d2f69c251d43. 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/NGB972400041.
Bullion Van (feat. Runtown, Phyno & StormRex)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bbaadf64a917dc926d831a52a0e60e15f26dd392cac99817095cb4a3ba97d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCACA1477120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ac5b71e8f80f49b7612314a3cf1f2a0a5bbf6ae62f0fdbb802bc4ac4e542d7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UK3AZ1715901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a23eda4c06b301faa51bd7ece5848644bff525305b079a8273308103d81fa08. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UK3AZ1614833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170f9f6e7a52f7e99e3dbd8e13f2ea5419397a71d77ac3439ec5d76056a7bd5a. 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/UK3AZ1400892.
Nku (Bonus Track) [feat. Flavour & Storm Rex]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c358aff7248d73b12a0e9ca6096f6aa2e4016741140c4b82a12208b5687a5. 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/TCACS1666226.