thumb|Three flavors of muffin: blueberry, chocolate, and chocolate chip. A muffin is a type of individual-sized baked good. It is often a small, sweet quickbread or cake in a cup-shaped container. It
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 0x1438bfcb483f0f2eba99d1f23a5bb2d3f573240a2248798d2bc8d8708e738591. 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/798899fb-d20a-486c-ad50-6413a9c894ad.json and https://artists.proofprofile.net/proofs/artist/798899fb-d20a-486c-ad50-6413a9c894ad.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 0xa3719f6021ae532cd1c1c277ef2301a164bcb3d06ff02ceea05f0063a17475c6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/RUB422400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5944a11afc242e388649ba2f425b5e3988270b38566b6c115301d634f212c3f4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/RUB422303238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e02712d3ff1a59daa5ed1e50ccae6d8f13db718381f7c13216a3ab2637cc907. 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/RUA1D2375811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56155e263f336f2335ffa43db4e0ad431ceb779c5c2d7bbbaa1a925328da5252. 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/RUB422300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeae3dd2d83636f1c29e2fde2683c08e3e5cc40d1608d458adbb17ec2843a53f. 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/QZWV32433740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f8d3415bc3562055da2758b8c69721a52fab01510126fb7f622768f573b791. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1D2573596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62102228f92cb399ffdd2c0e194e21b254bee5de7024dd9085d716a5776a8d27. 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/RUACR2401785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf35c6cf00aa7e42adb085b1474121c67363b1fc2a622e171208a0c4ccf38d1. 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/RUACR2401652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ed77618bad43344d270a93b6c5b37b49877556c23cc9a7c19ed7a561b4636e. 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/RUB422403419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25192d49b6f9777cbc6b1c9857766b9f4042ffdbc9265a574958272f114b8c2a. 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/DGA0P2400757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8159456ef437a39015747e07c1256b7a57c6611d965c7248707d380396f5dcf. 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/DGA0P2400758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872b73b15201a4ff8e42670074ec7ee21be9afb3f46c909b7cb6941f41a09840. 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/DGA0P2400759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c34f3162b77db30fc1cfb5cd9202ace09d5a1e5e57b05a1a763a5bbd1e334f. 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/RUAGT2450017.
On The Floor (slowed + reverb) [feat. Muffin, blueberry & Dayana]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc0daa294759f063a35a647312fad9c7a3d1cf7311c89d8bf3ad823cdf62885. 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/QZS642212084.