David Frank Paich (born June 25, 1954) is an American keyboardist, singer, and songwriter, best known as the co-founder, principal songwriter, keyboardist, and secondary vocalist of the rock band Toto
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 0xf2cde51a63e609994aa3d294ec7f343952dece1d1df884f36f92c38afc29efe2. 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/bfbe3201-4502-4254-b036-b89e8b0d189d.json and https://artists.proofprofile.net/proofs/artist/bfbe3201-4502-4254-b036-b89e8b0d189d.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 0x50a81c9b5c387e0fa7df1394f7c5a4bdd63b59b37d71b540900ef3beec973310. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLB932201801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0701baa6b75ac5a391270b4884440c5f342851262d16542d3660bccc5474ab1f. 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/NLB932201802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2beb71cd729dfc8c0efde712b9092630304bb4755e9eccdfaaeccee7e13b3ef. 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/NLB932201803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6be34a52626c1c65737981ba1482cbde218d668a7b222dbfb1d3f698656326. 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/NLB932201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc01f8d96c833faab51d1cbfb18595e1e3327ec38e5c8f55f627b14a228086f3. 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/NLB932201805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09402604440658160c505e2e0d8f230567a42beda2ca9e363a3e92a647a1b51. 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/NLB932201806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86b9701908cbbe72c0f21c8e79a37f653cc613125121b0d8479fe5b4495fed6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLB932201807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf90125889383ffe25dd9370f750dc781122c5c453b27321a60cb232dbbcd06e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM4TX1849969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e1add3fccd819d71d2692f3bf8cc61eca9cc80736d23174ed44a23defc4d2b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USGR19400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d46cfaa6b4a4e276fb0e67c3585b86d003302fd7789b13f4ce0de244001a775. 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/USGR19400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a38a8d10780ac14d84427aab5c4a489badebbdb2b394dbf8b40f4226226c1db. 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/NLB932002905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ea5925e30887265554d640080e93c1501ccca7b62ac4987ba1f3dcb1b0aa44. 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/NLB932300902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00002b18d4319b4a283b4dea4cbc86356b7d5702bc48c0234d6d5fe5dc4ab8e6. 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/NLB932300903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61beeca24a7265cfd3acc645c57ae9535a3170ac2dcd772111f09c21dbad894a. 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/NLB932300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2d952767b427a13ea96719d89a8829bdfdb8c0cb4f0cee03ca73f005ea7b10. 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/NLB932300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1863fb2ef71658656456bc553c63da355ef7e42ad64ce42c256e4cea279451. 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/NLB932300908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e3627156f71ec425069ebf9c99abdb91c969ff38db9ca10b6f004fb9a899b6. 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/US4R30602415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20666d0cd776e0ab647bb164b4ac48e1e82a37f7f0c1896e6e281a2a77d6896f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HRA101104505.
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 0xe33a75f0d494a767b51b4fd4c89b4d12e7fd2aca8d55fe11413d2fbb0b59bddb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USGR19900240.
Waiting for Your Love - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6fecf8141d2de9aa2b28f30d6c05587b0bfcc21e3cc3605959706ad716ec62. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QMFMF2010352.
The City of Prague Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8500d02841bcfbdccb517eb0f64964cf5b9b4600e48460800ddc2d2ac5a75b09. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAJC9700732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc1ca8503c4ce4816f5a596ab5a114f0eb678b055d22909136f706f99b4a41. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USX9P2029918.