Frank L. Marocco (January 2, 1931 – March 3, 2012) was an American piano-accordionist, arranger and composer. He was recognized as one of the most recorded accordionists in the world. Background Bo
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 0xfe150a7cbbb011376a02ca020fdc9702bee220f54077beb5c7ba55b4871d5309. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/becc3ced-adab-4e96-8547-a1b6ff799501.json and https://artists.proofprofile.net/proofs/artist/becc3ced-adab-4e96-8547-a1b6ff799501.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 0x8d82036b64f7b45adcd8f8d6e40d9212486806adf5103954a76c2f9794234b44. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ITAJ20820030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d9e769e59abd28b6e0c8b6b0f0d76e7b2aa81f76a11f1cbd6232b6fef16552. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEBL60726913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180f79314a6ce04c8d254394128be59c68ec75c626db99836399bd0b78cb43c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBL60726915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab0018146bb8ad2c59e7028d92f4b35d275ad629307941a78a5b8418be6187b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEBL60726916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99bda7a1ed3f54c5e8efbb95fdbbdf87cdec05448c5ec0d5b80b0d77c98cba4. 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/DEBL60726919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8973d195e0498a19de548cd4dff7b32789c65e5563f73e2bae77c4a20915795. 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/DEBL60726920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d90a7872a2fe328b63e293ac00e9a04094f37909e821b7f341265be17db1e4. 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/DEBL60726921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4ddf40b726fd69b39583121bbb6d824078ea85786086a24ff20ce9e764a902. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEBL60726914.
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 0x0400034a35c83057f901dc126cbf82664513fba72ce6b89c6571ed2c4b96a876. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEBL60726917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bbdc91b7fa9d67fbd390f89ee27b1bb7f83bd195b052adeccccd86b3a92c89. 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/DEBL60726918.
Like Frank Marocco: Frank Marocco and Friends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1155e20f703b29ca876df1a20c28b225a311d058ea3a10bf017c788d79aca44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITQZV2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376d6cc0cab77f08fda54bed273a73f0c621414f0a3d5cb5ded06c47710e9476. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITQZV2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43add9219a8b71a681ef67c3e67915ae79f5cfd69c1206d25dca28002365f06. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITQZV2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd53d4615ec059649d025d6261963868beaf81ac1db1273b6bd40a78a3ce5320. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITQZV2100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e24620f84dbcbb4fa469fc9fa2070cf07be2be046a100675fe876cd9eec67f. 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/ITQZV2100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed92e36ec8e61abf46b1fc2083871485f40871438dc054c40ffe8204e9412aab. 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/ITQZV2100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb584e2a96600990dcdb163e780a4d6059d5d82a4882308a386bce2b9ab25b7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITQZV2100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61fd59d1c8d93b29439dcb9379a4f0a6e6dbd773ffb3478736d10452ad02d19. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ITQZV2100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf1489d133ddee2b175d6e1488f5674f195458bd800a48e47169a3e573f3974. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ITQZV2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb9469f1826b9a449969b1881bcaf6fcb7e3bafee34a801bbb56b7b4d0ed7b4. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ITQZV2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932cb91f4b6db1602b8eb26f6aedd7a3126f07633f0cb6de8591fa737ca2867. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITQZV2100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6becf6954333af9967476525c3ab5c45988df7018c09f33c1b9c972e04d56dea. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ITQZV2100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649fc71df229d18eac35ccbdea8cddb1e8405a53639df0d3aace51d78c267e9d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITQZV2100119.