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 0x765e1f632abe852e8e7eadc08de29f38d7cac3ed923a1682b9d199a36afa6c24. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84687a2d-7005-4868-a4e4-7825a400eca2.json and https://artists.proofprofile.net/proofs/artist/84687a2d-7005-4868-a4e4-7825a400eca2.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 0x3a6d5662f6b587da01909a0a9287dae57662cd43297479ba76dbce07ba166a84. 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/USRC12101827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18b1ecfaceb53e30d6d2abb78a35665ab5c4cfc1358ca39d61fddaf74054ae8. 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/USRC12101828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd008e7a4129865c3b467ed4db154363b552e68abeea773d1d73fdef3bf688e6e. 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/USRC12101221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e76522130371fb87f3f7f0c70bd7fd444baba21242a0ccfe535301836f1421. 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/USRC12101829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66291131f54d448f510b8f815acd6aad39012c36b73482226f8070eab2b7dfe3. 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/USRC12101830.
Evian (feat. PinkPantheress, Rizloski & Rax)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1762f7babe349b1fa5438e58696ccf836a7d23551db8be74c684580845a3af. 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/USRC12101831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c4891165a806bb8fc070d578df0f0fef238247bb99a447b9500ce994a380bc. 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/USRC12003866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe504e82f8b80cafaa90bc9372398a3842c67da57023b45764847fd973752402a. 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/USRC12101832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0523b25907e2cbe9a93d2d29e9215cb1298b138b93b0cb0139987efeebc6ae26. 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/USRC12003728.
Thump Chronicles Vol. 1 (feat. Pressa & Dan Diggerz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79c626fa6a3818a46c2024f429f770f07c6013eb662b917b9349240b09814e. 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/USRC12101833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b9235c0b3f070c23df92fb2a62ea5226975282bcf2c2d393f2563e69096f45. 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/USRC12101834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51df7a2ab2e084c1c4da311b6e3205049475db93dc7d8797b0f4d3237902d4ab. 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/USRC12101835.
Wild and Lethal Trash! (feat. Fire! & Santigold)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c1f9ad77002b9d25113829036d3a19243e73dfec2a134af487a8ed73fe8558. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRC12003867.
Don't Cry Over Spilled Milk (feat. Jesse Boykins III)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1a99eff84395f3f87fdd7dd188de6d4c54949d06f413c83cf55d48746bf756. 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/USRC12101836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd6a9ccfbf234988555f690c1a942e59c7fe2de006cfb5d46788cac49fb7a92. 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/USRC12101837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca6b940cf53b6dd78a5de5b321b522484443d8ef31443be78cb80d5692cfaae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRC12003726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd663e120814dcbc94756f3178b9392d2a8b2ba2eb854351847ce37d498e2bdf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GX3Q92167477.