David Mazzeo also known as Wizdom, is a hip hop artist based in Seattle, Washington. The emcee has released three studio albums, one mixtape and one EP release. Guests on his music include Brainstorm
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3452c80082203a8f0ee28482c3dbdb2331854d528f9c48464117dd588c8fea2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a67269fe-a196-430c-bcf7-64e69aed180f.json and https://artists.proofprofile.net/proofs/artist/a67269fe-a196-430c-bcf7-64e69aed180f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac22d72f02a6b9e0ef250c496d37d59a3e3ac5f1b7ca9ebf61d02241585c6d6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR96X1935031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9942c71e1626b1b42b79dedd4ca864b6f2cbeb2ba25a9515ee5fc0c4acd84753. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR96X1935034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aba630de29df266571f5316314646eab4caa44490f2eb13f182e2a3f090fa42. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR96X1935037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa4a93c9bf876becf5a387e453335daa50ce29af3373e6050d36f91feba456d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR96X1935046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7deccc8c0c992c6f99c88cf32b22a94fc3b47ae2cf6b35f4bb11d052cc74d6b. 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/FRX201948650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791dea70adc9a9224a56e211de8ad5a57982bd9d9cfda04705b58a1f174f96f2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX201948651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeccbbff4f90484859a338cba217ba7560192685a2675e51c96daf014df60782. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX201948654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ed71b97421f26067495161179e1b6e5ef530191c0c6e04f59cb975e90f6d66. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:43:04Z), 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/CH6542096322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f70144496f57e3536cd0d7e506f85d24cbb5fc28ebdd472286629b04860a09. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6542096673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35cc60ee639be1c19a30794f17a840a97a5d9e25c0fc138dcc3b088a50a3b84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH6542108245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf324b91d61971a17f31c509cbfa238fc8c3e86d3070616d53683c0c2425ee2. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/TCAIN2494696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e86408d1c1b98ecc43d186a49ed826b7361b22eb2dd0c9b131198ace0969f93. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIN2494705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf16383b10c18c76403de700286d9b0c2ae2828a6345b8c7b40321a2341432ec. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIT2495311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ed336fd3e7c10c9e4bac6dbc74a98681ac76a8c832358e395496c88c4231bf. 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/TCAJR2545534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26b658680ee61026a3f740eae9d607080a67ec5e478c51eb2de2b65a4f46385. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:39:22Z), 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/TCAJQ2545692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc102ed390189c54806e673bb54de40fab9f0e42ca469f3feb0747e26625c27ac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJQ2545718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e77074d29ba40e69017aed04f92b77b28d934a0227735b4b6fcce377b2f6a06. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:36:46Z), 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/TCAJQ2545772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d63a42469b1b6559323196e35330cb835d4d47db63bbc41055abb760510ab2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:19:16Z), 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/TCAJQ2545945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd2beb9d9a4930622b139da710ab9aaaa06fba38833fbe94f4f955b2416e307. 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/TCAJQ2545850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cbc24fea47da43889324a3e29ec865695e7d61bd8dd742de3d5452be6d237e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:52:38Z), 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/TCAJQ2545915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b0fe1070a2061df3477a268c5ae4cf87928e2ae2f32bb5792198518a8a67f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCACT1646295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1601b32a7ab5b78fd6c01ab0470038c41e48393e5b6b327ddadf96bf7f4ee491. 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/FRX202052995.