Michael Stephen Portnoy (born April 20, 1967) is an American musician best known as the drummer, backing vocalist, and co-founder of the progressive metal band Dream Theater. In September 2010, Portn
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 0x5b5c2103f4b10db068c36695899ca663b847482e69fb37144d99dd9e4e035116. 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/a28e8e06-6d45-475a-a5fd-81f99358ad00.json and https://artists.proofprofile.net/proofs/artist/a28e8e06-6d45-475a-a5fd-81f99358ad00.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 0xe83379dba9ccf4a55ba7794a840323a26f0bc20ca6401dcfae5bbe0716d943e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US78S0570402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94b61cbd7efadb5c6238052f661a6063b4b78a0ea753cf298246d665a4502f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:04:22Z), 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/US78S0570403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa66b1b9f00aba5419afc8d065539be48abb7e35b953b19acd2b755008d08d4b. 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/US78S0570406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167f1d0ce26f72c69b0671bd87bd1d42f23a504989ce275ffebe8027923d8393. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCHB2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b11f428a1c5461e4c9bd09ca7b981837d76e508f0f01ffd9500cb7f586912ae. 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/US78S0507601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f9f3b6f0f5232edaa8ac3e20a8b656f68c56670a4b9afe8628744c59dfb3a2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLB932200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6835089c6409e9e840b944826ff43edead9e3dd54a98b57fad1aa16f1d70e96. 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/QZX8U2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fa4a5e82403d200ab30c84778a84eaeb7ec640fa53ea8baff3aa6f014b4c19. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US78S0503501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ef495ced972fce7ddf7ba83f11a4c97279facfc9ef15672c1382d237255bdf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US78S0503502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ba63b72e6e9895d14abc944eac74dd5bacb7a614708137f55da7010059834c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US78S0503503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126ec9ce3b64b972aeff38c3ac0d332e74fe3a3e5c34977258bf2ff092dae5fe. 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/US78S0503504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ee84c87c0b7c679f91bfcd9298d66023e1579c34456fc89ec1d9b29620e664. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US78S0503505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a420809538cd6f2e3f1613e87aa5262f17f6dcb654797b9016b6896a331b87d. 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/US78S0503506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531108861dd0c5f56f8aef8e472c2763f679befd54375f40de111630e03e8247. 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/US78S0503507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1c03466cf5dd7ccaa721b6edf6977314bf012a0e7ef82cdf77d03977cca7ab. 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/US78S0503508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd22ba2fabd3b341d2f5ce7dbfb63978a17f49770914464bbb67a4334472511. 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/US78S0502301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18821d1b077f14bd0fbe0bed90185541dd669bf9378c7dfa155405b0d42b35fe. 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/US78S0502302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9787879f1db329c45c86fe52103d687de1e428b14721535b73bc3440b2505a5c. 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/US78S0502303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164f2c9cf48e6d26ca6f2a947d97cac3b02fb1dfd87714e4b1e80c369a4237b8. 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/US78S0502304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20722fa9a331292a0bae8a3ced81041be393dc22ffc3a861a4bf2b635eac97bd. 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/US78S0502305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403908621abf8b2687017b40820b4fe88de0abb2ef16e751fa2ddb4fafd68445. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US78S0502306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6773a8af92a96a3954eed2703f4248899119a506c64dfcdf4cc2ffd1052af0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US78S0502307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8c1b9ec30ed652648cf7978c907fa371e1cc5ea7ba451973364abf473d317b. 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/US78S0502308.