Steven Maxwell Porcaro (born September 2, 1957) is an American synth programmer, keyboardist, songwriter, film & television composer, and founding member of the rock band Toto, which he founded with h
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 0x57d6cbfd1f19ad199e6962f5c2d3bca9bd6aa1efd68353cc3bb58e4d593e77b1. 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/ccbaa984-4ac2-4887-a282-70850b8555a8.json and https://artists.proofprofile.net/proofs/artist/ccbaa984-4ac2-4887-a282-70850b8555a8.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 0x30e5acbf99631d98e72de72f89325537b397531d43fdc81540e56be1d491bbd1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:13Z), 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/TCACN1636075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9154cf485988e68027ee80333853c71f6504bb72ff083c3a4775fcbbbdd98628. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCACN1636077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0451f560a28b9173b2bf838fc11a840b43f2938c00a9c6456992314d17ccdee5. 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/TCACN1636093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5ed3da57db6df8611a74e799ba0be4a616bc4df64b89a87ee8101bc0854397. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCACN1636097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f244d7ef56f646fe2f68d34f0bf32d78482917b99a9014d1e493f1c10eb76d. 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/TCACN1636099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdfd846659bdbb961617e9362219f9133d103d45d1f6f9c350eb2c60736272b. 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/TCACN1636102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85376b505a6a782f98b97f6a6272c0ea3a0269dfffba18f063ef1e203d5d5277. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCACN1636110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ce7795ac3a8cec7428c3ecf9bf871c66ab6d2677a485176cd98f6e77dfa252. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT4UW2500009.
Justified (More Music from the Original Television Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a295f615ce812da33908e2a02edeed532ea4bb00156ac23c1356e78c73ea47. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:02:20Z), 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/USJPL1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554afaa02b99ad65755fc17eb36edaaec3a1f7bc57d2e6112690f80296ea503d. 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/USJPL1500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5319a6bb37382b84068f59a07306ea1f74ce258c912fe3f38d5b1c2aa312341b. 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/USJPL1500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e873bfddbd5fe459cc1f1500d3e78d49fc46c6a041bfdf2853d981d0f15142. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USJPL1500119.
Givens Theme / You'll Never Leave Harlan Alive
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb4b99d450b9d38cb6134fa56ed65f63e1c46a15381a7ceec6d6e4f095572a7. 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/USJPL1500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995c8c5297a203c75cb257494a351e5fbd2187c797e649f997fa63f9f98cdc93. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USJPL1500111.
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 0x3a3946a3231abfc129f5af9d185208e9e180d6baa9e772ba3acaa9fccea30785. 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/USJPL1500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0745b50e06f6d016d7c7617fbca212f3662c3ece9b4f18e1515a3dad16e78f6e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USJPL1500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e0ac7225c99e62a793a015e1a13228b9b0593e0f2adcee2e68644b15752303. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USJPL1500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0ea5f577a585761de484da77feacfbfd59bb102d9b0324d171131bd035a1f7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM6XS1807058.