Adam Holzman may refer to: Adam Holzman (guitarist) (born 1960), American classical guitarist Adam Holzman (keyboardist) (born 1958), American jazz keyboardist
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 0x066a92d4b1fabbcc88224f9bc48d797323ed9d2f2c0da0261a060217b619e88e. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d520bb0-1279-482e-97f2-da560e4f1641.json and https://artists.proofprofile.net/proofs/artist/9d520bb0-1279-482e-97f2-da560e4f1641.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cavatina - Highlights From the Guitar Collection
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 0xbf2993891e6216326d6c03d8395ec7a5bbf6e0db5848ccd7cefa55e63e0eed06. 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/HKI199229203.
12 Danzas espanolas (Spanish Dances), Op. 37 (arr. for guitar): Danza Espanola No. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6e163f4cce364208f4adf72e502c9f346693071ab204bc10980af1ca701c9e. 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/HKI199229204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeecc0a545a3219d0096876d73218417666314813c6d17b43387f0dc25a0620. 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/HKI199229208.
6 Airs from the Magic Flute, Op. 19: No. 5. Konnte jeder brave Mann (Act I)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d823313061fc7cfdfc63ecc4616dfc74433c1da8f7b42b9483618a9259b67b7. 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/HKI199229210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4ce8b778785082605c7e2ef33e477cb363cbdc56af1602b8ba32cfbaa2abd1. 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/HKI199229212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e37ab8a9d51b0448baee2e0776fd0920a1bb1c5f5a1c8bc5bbd3196ce604834. 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/HKI199229214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c09aa64d4b74ddffd807c06a2f1f198fa3a37ebab954637a643de8b57988042. 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/HKI199229218.
Cavatina (Die durch die Hölle gehen): Deer Hunter: Cavatina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e40783d078a11fbf923e47cc5f420f058801abbd09d9f311b8253c3d89dc4c. 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/HKI199648019.
Farewell to Stromness (arr. T. Walker for guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7249f6ee101837f4b8b10aa35b0419afa85750873bd4f060079f0afd78380f8b. 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/HKI190412006.
6 Schubertian Songs (arr. J. Mertz for guitar): Lob der Tranen (Praise of Tears), D. 711 (arr. J.K. Mertz for guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd8f05b13d0b45aa23c87a33e21e467c66030946a1d3d5f520e8381b0f0a672. 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/HKI199294512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ada868a6fa92b40739e7cd1227a170dc67833b09458aed48be6ea26c5d9cbb. 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/HKI199236005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44633b160de25a81ff95f2ce9c168ee5694799e90deac31d6124e88f5bc558e. 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/HKI199752001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1880e30832cee6a12d98bf15ea3645aa06d028f7403747397d1c4044bdd0dc. 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/HKI199752003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a48243bbe0703f4d925dd9eb774280d1c9fb2194366688545db98fe9e191f0a. 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/HKI199752006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acccbee4f1490f0035d8e90f38860989d04352ff20c03f4f61bd0e8583049b8. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/HKI199752007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413e127467bfab6806e9c7148db372455a48bbefbde56fd4a96796584253b8cd. 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/HKI199752013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924e246573048cade4bef62110a827a900b34e031fad1106289bc43742d9398b. 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/HKI199752014.
Guitar Sonata: III. Allegro non troppo e piacevole
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fa4d49354dff7e1eda20a6585a5426ec7e7b68c07a7c10f403254a536d74b1. 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/HKI199752015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c94499d0d677838ed22d8233288aaf6f1c77bdf54a314bcac23809356131d6. 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/HKI199752016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c54ce4fced6e57179cfbc020595c09d91836988f3fc63d520f0bc654ef539fe. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HKI199752002.
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 0xf7b1bf896fc4d847faf00d84ca15a99e32a46d564ec91e728de2fe4070242dd7. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/HKI199752005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605cec967ca538fa214b50f3fa58982ab3462ff87d53f8e7e45002ded912142d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI199752008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7bd1b70b2699f547e54ec8f3af9c0f6aa1bd28afcfc1c7e3ea6b4f4b5c1a56. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKI199752009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2099e6d3c3d486a8c5d0a5d9e5d60c9db705dabdc2ec8b62e50d57f1a0d87915. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/HKI199752010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc2847421d9ed040841ebb4e762a0df032bcd5b06866ec8a9ccae6348a18f67. 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/HKI199752011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ed6fb881dec14d74c3f11c5162fe17ac8df29d7222cae9081d4391592c366b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI199752012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907cbb6f786960318e9ab903e8babf1df44f994c358c059e8063bb83fea4afe3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKI199752017.