Ethan Samuel Slater (born June 2, 1992) is an American actor and singer. He played the character of SpongeBob SquarePants in the 2016 musical of the same name, for which he won a Drama Desk Award and
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 0x7a742ddc11576378c29de09cb611c53e3976cd50c73e075a719740f6c2febe44. 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/6d1eaa35-ef2d-4275-a2b9-3d83e4517dda.json and https://artists.proofprofile.net/proofs/artist/6d1eaa35-ef2d-4275-a2b9-3d83e4517dda.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 0xc64699d219770835b071ee3ea3b74b32f046340bd8662847829e7d3b3654b0bf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMQYB2123201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f930f84cb7e335b3b5d06a5a23947dc89ff9d45be2d8239c8d7955b0d952db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMQYB2123202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbfae28d8f583209615567cc9114f28e771bf9587f12ea5e4a272357dc7d81d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMQYB2123203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ffe171ee437eca91369ca32fb03330e41c95297cf0242e5547696fccf053a7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMQYB2123204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd812ac94579344b5a7dd65eb8b3a10ca5b6a92a5bd19c435a137a56713190ff. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QMQYB2123205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d4ccef8c8336442f5536856d09e0e07f1ce06b1cb559f6591cc2e1ee3460de. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QMQYB2123206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b9460f84c3a4678f7b0a0781362deaf47aded3e18e7eedad0fb2d906ca4067. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMQYB2123207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a635becb0fb4f462db4398a4bd38cc23b9c1942cabbf1dce42a53ec151d9d2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMQYB2123208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1839b6f84427d4c08294e7972b9d227f0d1145f8601ba35c2eb088cc6d121a41. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMQYB2123210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e986f14ac7a38faef1855c2db7c23dd6cc11834b485d9ef38d4ddf811fdc3c. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QMQYB2123212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0196101a0a76495c1bf752c5fd382b3d020b2c2c1fd03a4a832316fb8625c09. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QMQYB2123213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8899411624af185e881cd45f39e2351502135fce8ece26be130392d026080d26. 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/USUG12407079.
SpongeBob SquarePants, The New Musical (Original Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc79a4910c02bf034d835866e42ede3c35274063fed235029958402c6134eb9c. 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/USQX91602688.
Assassins (The 2022 Off-Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9256fbc0cef5e5038030d573bacaf393ee02947e6619b35f98e5e7c0c8356cbf. 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/QMQYB2225002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839016fb35667f71e91685a9f3930a90af453579f38fc08b0e51f7b0db643393. 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/QMQYB2225005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1fac4fdbd46282a1f09b8959ed93435ff5fefa55069e36c4b04a4879db89db. 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/QMQYB2225007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b65e4a8179faee7ccccf4706a3ad3c14d3db9ea759e2ec95d5d59217f021156. 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/QMQYB2225008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d5b762d6865bb98d4d1c87285b9088c83653c7aeac71dec3efa05eaa6cd5e2. 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/QMQYB2225009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6845c6117b75213bda3254e7ecd44228f00acd2ec3229f8df17f5bf301ee6c5e. 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/QMQYB2225011.