Harry Hamilton McKenzie (born February 17, 1990), commonly known as Harry Mack, is an American rapper, producer, drummer, and YouTuber from Portland, Oregon, known for his viral freestyles performed i
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 0x3a542861aa72af3214615f62369d319b50273971d56d47b3466629b914a0da87. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6449f43d-eae8-4808-84ce-23aa07812966.json and https://artists.proofprofile.net/proofs/artist/6449f43d-eae8-4808-84ce-23aa07812966.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 0x0c4bc0ee6b26bfd69bff4bc6a3411083b04a0d914890484f434ba7a65e39137e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAAZ1195079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d112e74346466b09b9ec370a36178be5fffc4f603fdae347c6a8d94e7f4e236. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAAZ1195086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6d786c2f188ca579ebbee40e5c6fe38b5d0708a7b52dc218470e5358af8fa1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAAZ1195087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b606e7f7587c96bcece09fd4570e32aed2914dc14bb1fd63b514f95ec6d749f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAAZ1195088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d36b8ba7d07ae72600962e557f150d1e65a0f452a7019ec919151a018a4e3. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAAZ1195092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d56169086a418bd172bca366abe81abfcb8f1c29a032bc073506b66b3d5fcbe. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:04:01Z), 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/TCAAZ1195131.
Noxious Descension (In Search of a Cure)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4d3fa45075f1ebf8d85d5864a325555258bed575877edde4947aa4b7fe9172. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:21Z), 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/TCAAZ1195133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802c719efc90248c5ee1bed492b18b63fa956b8d151f904449795c7247a293dd. 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/TCAAZ1195135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4bdcd71e7a07be2ba572834f280aa90a62dd6e0e5c3508a94f3cc0c6339285. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAAZ1195136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79376bab4399b183d3a6ad493bcd037d0d61b24978647fa5352f09c6d1e989e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAAZ1195140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e888a4e9df8dbab3e80a37b686bf4c5f1db980c27bff8654046596072dfcec9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:00Z), 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/TCAAZ1195144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d05e7d5d09e51e024715c46db9d1b52235332cbce200c0e021c69bf30094017. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCABK1254044.
Slime Rancher (Original Game Soundtrack), Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b57cb9c90d0fbdcb6ecf4f8c93c370b66dbfc8d471daf5712696ffb56cbe1a. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/TCAEN1997268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189a835e403d6a984d161a298394ddb787763ef700bad76242228d26e2960e75. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/TCAEN1997273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682c768f5823f63f7d05098e4a46313e4a995b830cb01287f3690b2a06c66f83. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/TCAEN1997274.
The Slimeulation Corruption (Bonus Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155e9e14f6359c4c5c377fb9fa13725943369c71a5033fac4e777e791e82231b. 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/TCAEN1997275.
Slime Rancher 2 (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047339c558d6337a2fac97e23ac671243b2b076d4cf82e4d2e2e32c85f668479. 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/TCAGH2203692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1187f70d4bda6649188f7507dd795778cb909d5be449d4ab56d0c8493f9c96. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCAGH2203695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490126ed6ab29f47e005a204215947bb9ddbd1141e237bdc1ed1e39fd89d85e5. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/TCAGH2203697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd4d0af895d0e9a18129191c5f68967d300ea735e9c373a5f90ce0a1bc465f6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAGH2203699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec07a874b3faff2e2fd0397df24c17fcf658bfd531cfe6eece54e7cb47a0fa9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAGH2203701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8acf104f850a23d9ed2eca088923c90cbe4b57d1aeff13bd608cac4b6d0a38. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAGH2203702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb517f7572c219d65801977295e2acfd53b85692f774c25118b5699ef362d4343. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAGH2203708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fed5e3d21370f1f41bda58c78ce481a3c76cbbb2ac92d326df0b34b15821ff. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAGH2203716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90d9b5f2d4e633ed0a610a49c4da532afb5ddbb167b9d53754c665b2073e76a. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/TCAGH2203727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f520394937f1f9fac32c67db3d49e5c763c6b2c9a12e600c1b2cf3a70a40b3e. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/TCAGH2203730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a88322ea13c04548c069b11c4509940ca9cd1df022d1e8061cc4b4160982c5. Chain 2 (Bitcoin): anchored in block 957640 (2026-07-12T02:27:45Z), 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/TCAGH2203736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac48d1807f6fac7eeefb392746101c2164b9bbd9418f715137c9f89868c27d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAGH2203739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25e708a6a6b4a708076aed6ee20a36fe11c0cf1483b8a2cad66998872fbf5ee. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAGH2203743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd1a924858011cdbc2a169d07b028436dc39bcc7bbe99483ecd81c55976aee0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAGH2203751.
Slime Rancher 2, Vol.2 (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b424c8310b1b00bf8d47f863ddae120014321390d0f4e08eb5d8088281112b3. 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/TCAJX2563578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb3fe18f1455d1860eabd052d6bcb0927c1bf282be4359be9a25b7c895967e3. 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/USHM91669244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f0f61969dfec24513973b64beba965029e2c151dd34da464500087e1457613. 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/USHM91669246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b8891c86cfe60a4e1ce8c58c0c0b8067af2d20fbf3a387648ba9bca73d9143. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM91669249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68af87c227b838e85545975099feab72604b82f2da168bc2abdbfd497097c5. 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/USHM91669251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e6e67fed0640391464d97a45d61a54c07f6f9a5ab07217d5765d17e2b6c36. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM91669253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a3d13f639f759d1312280d219d801453bc1c10b53ecc5ca4fa5c73f9c03d52. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USHM81759668.
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