Eric Marienthal (born December 19, 1957) is a Grammy Award-nominated Los Angeles-based contemporary saxophonist best known for his work in the jazz, jazz fusion, smooth jazz, and pop genres. Early li
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 0x4819b1cc3819c8bda85c03d315d8d1d94f18bf9b3ea664123ec3e3f0230a0232. 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/fec3bf71-3691-4212-b8d0-1b757d2c533a.json and https://artists.proofprofile.net/proofs/artist/fec3bf71-3691-4212-b8d0-1b757d2c533a.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 0xabc533f878e6169f0bc8f260a332d3fede25303f2db99560b7bf874fab8b08bb. 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/USC4R0305906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e2e1bc35a10bd7683b738f2dc2ff844b7486cf160c74979f0c5844b1aa7d1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USC4R0513679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d12011211f8d227afda7bc9e70f842d0c1be81762640633267786a6f1a67494. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USC4R0714911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73ee9c4776618e66ae4403ebf4689e314ac3b51a4f7519cf48ea0890a6f645b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USC4R0714912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bdb0024be14636225893a32120e1ec2f4546bfec99ad5b8798159fe67c5652. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:19:16Z), 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/USC4R0714913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc5f67ef55bccf3fc630102fb474988245086d333c43e1d75dd72072ad8f6ad. 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/USC4R0714914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6309c77a187969729078ef601488ca44dc610ad3591dcf9ab2cf3cc21ef8223e. 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/USC4R0714916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf730c674809a2e9e4300247aa8bdd24fe666cbdde93ee47aff7542e39c785b5. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USC4R0714917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d85a0bd0a7f30209771ff95bbef99bbcbbf09a397c0f65ab00c4fd30780c1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USKO11101336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025d1736adbeaf4524f9dcaaa694f24ea7318de5de4581563c7f36f1a56c6e95. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US7SF1555871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf475b6786a2cddb276ada4486a2773d59ecc7e2f600f531bfd280a6b6e001666. 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/US7SF1555872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aca952c42fb730472628767a8b8f6ebdaa28c95add3e7e699d40a64cf612b6. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:38:33Z), 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/US7SF1555873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0126aaf60ef19ab4d00e3d6a59e2513ea66784bad5aad041fcdc9e7aa3914cd8. 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/US7SF1555877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05d6e3aa84863642850c85b89e452e726ef758cab91f915b4bedd9f81c9c922. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/US7SF1555878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda30006b227d41db3184ea95418cb07bc2ef0b1909527d3b72d266f2fcbde5e. 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/USGR19700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3deaed30ad11d6c8e1eef4c895f53fa8067f4d576513e7f6d16e8b71a9d4e8. 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/USGR19700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f134af7183b98a5ea4e0770ed2745e5c08769f01d68d26a3fd93699ca08304a. 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/TCAGD2279071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd949cb9c7d58522cda14659cc176388edabbf79d63ca17ad62a88b18e77d01. 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/TCAGD2279109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbb2f7da130970643061cd811ba37c5001a12372dada3cb91a87fd23482c9d9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:07:54Z), 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/USGR19700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4935d68e83e7db3ee76354121bdae05be56a4a3143bee3a2546b18fe1c8791f0. 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/TCAGD2279086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3f3c5646d31e51445dd41e9e8fe8f345673bf109a40f8ee5cc42d84d8a8b41. 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/USGR19700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e93e87ea812f01c81acecdaf1505a7cbb0aaf8cfbe4173aa1eb2cd15cf31e1. 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/USGR19700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3deaed30ad11d6c8e1eef4c895f53fa8067f4d576513e7f6d16e8b71a9d4e8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USGR19700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c17be1640bb9feabf3369face9afcb16912c181255717c2c6911663b64c599. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/USGR19700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e93e87ea812f01c81acecdaf1505a7cbb0aaf8cfbe4173aa1eb2cd15cf31e1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USGR19700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda47ce639949297a56224b5cdfa9094c26a7971d3d0d5cb2e1cc96dc5cd353. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/USGR19700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f579a3edaf65da2137954b81592970fbb094e6a41ba926e8ab8abb5b92a34. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USGR19700069.
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 0x56ebe64f8dee44333d7c227249bf1cc3c5e66237ab42b262e91f1bc8f1ff635a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USC4R0714909.