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 0xf02e33114b83d6f701520b24bc6273e290af5048d387fccbed3d6966fab5e671. 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/a721e504-df13-4f93-b0d1-dfc792640042.json and https://artists.proofprofile.net/proofs/artist/a721e504-df13-4f93-b0d1-dfc792640042.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hamburger Fans (Hebt eure Arme) [Remixes]
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 0x9b5c0e57002389c8bc982aee1010bb98c3b68a7271df5c9a501fb2ec0813e7a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UK43Q1602314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc468e6891c649226d09fd594a0225b7d7a0a5b8ab2809822d09a2cbb88f84217. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UK43Q1805877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6347f6668714e666f9a89dd460dda2142d509685cbfe75d8f8430e588950e2f6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UK43Q1805866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d73d291c0e07e4d5f5bf00efce20dc8234a6baa8eea604708db72d42f9ad10. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBX722300541.
Pim Pam (with MOJO AF, PsychoYP, Fresh L, Zamir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa6d58cc99afb389119f4b9d86ed1935b501d56a816633fc416c031de8cf7f7. 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/QM6N22282699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a43ed50ccef4f3532f276b776baa873cf85d47daa89227f19992367a9d2c82. 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/QM4TX2081729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9be06fd84c01cbb780e68a1d8f9d7c846453ebf2f97cc6be6b1eafdc5057af. 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/QM4TX2081738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1e37a504d615b3bdecb0debe0a51ac074254f3b9f219d907cf7a0c0bbdcc64. 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/QM4TX2081730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1d85668ce96650e525f0b8ade65043f67d0b0b810e6570691e3dd229f8c368. 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/QM4TX2081735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02435f5602a21b4e25c0c7a89c7431f6f2293e185f3f43701471f53458cef0dd. 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/QM4TX2081731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56905d3d618bf9c220517d164a8fde0ebb10fbb339c3866f978e6c0e962c9278. 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/QM4TX2081733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76bd12a52a085c222101842ef3ee88eec65bd18f37c85ce981f1c8060b4a94d. 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/QM4TX2081736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f100eeebaeca00558607da8dac26f426c2a2535f2d0c9d7ef9ba1f71147e55f. 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/QM4TX2081737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d3157c868f784815dec224129817587c88c9dabb35e42651feeea3f5846ee5. 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/QM4TX2081740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6107b9ced916520c765424492c10092a2ec86b5959acc0826f7e84cd552e7264. 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/QM4TX2081739.