Prof may refer to: Prof., or professor, an academic rank Prof (rapper) (born 1984), American rapper Prof Edwards (born 1940), Barbadian cricketer .prof, a top-level domain
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 0x236ac993a55285e7253b8ff9229eed7967bfa23ee38887c9ace02ca5fef3c437. 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/1ddc5ef2-4b7e-43f8-9521-da2e3535d9b3.json and https://artists.proofprofile.net/proofs/artist/1ddc5ef2-4b7e-43f8-9521-da2e3535d9b3.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 0x98dc9ef61dc6403360a7ddd70b1d267275547b6e671e111b1b5965486d842dc4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USBWK1500028.
Big Dog (with That Mexican OT & 2 Chainz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b50258dd1940d5a53af25496f5ef43b757b575da3e9fd2aec7132c7ff2e924. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2263669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3c5851567421c535c9572da79e3d616e7a5eb0b7aaec4e2b292a09d6774403. 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/QZWDD2263652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b95f0e5f540b3db63c351a9f2689b7fe225b2dfdf69608f1cbfe1519411740b. 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/QZWDD2263673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3c5851567421c535c9572da79e3d616e7a5eb0b7aaec4e2b292a09d6774403. 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/QZWDD2263652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd467937f7323fb168296d92d4db5bb53d77d1641c1bbf11f687091d293106b4c. 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/QZWDD2263641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b02bc06f4a64f74f85614c1d3dbaa081f0f8bd0873af29335344c1a225efaaa. 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/QZWDD2263644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f8c0faad138fca849c8067725924bffaf519dc0726f1b5bd6bfc32759bfb06. 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/QZWDD2263648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3c5851567421c535c9572da79e3d616e7a5eb0b7aaec4e2b292a09d6774403. 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/QZWDD2263652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc078ca69ae58a218a15c35b0dd4ad6a203d44eb4df779107a4998ee345060948. 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/QZWDD2263655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e7fb7745ca048ffdd599078aeeb96bca8fa829d80973aac37b405f3fafd590. 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/USLZJ2222203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd84e97080d60f77b616392c04a10d30667df2fd50e4e136fe828d9485a12c3a. 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/GBRKQ2277714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b50258dd1940d5a53af25496f5ef43b757b575da3e9fd2aec7132c7ff2e924. 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/QZWDD2263669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b95f0e5f540b3db63c351a9f2689b7fe225b2dfdf69608f1cbfe1519411740b. 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/QZWDD2263673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1343df5eb2d54dd87409e1b91e6510c74fa5d32c13fb4a05b8a09087a87ed14b. 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/QZWDD2263677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d40d9c6de0cc8a46d577364137bfbc80354e27b42a44e5ec13f8957e94e284. 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/QZTRX2280335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c54aa2049489d182de56f3e3f7edf8d36a60cbd14359c3ef9159061c66f30. 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/QZWDD2263686.