Darol Robert Anger is an American violinist and founding member of the David Grisman Quintet. He is recognized as a fiddle-singing pioneer. Career Darol Anger entered popular music at the age of 21 a
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 0x64747229ff8492883ce0d3a1a16a15f64177552110406cccc5721010af3a4f5b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3da32fa-9d94-4ad5-8fc1-3b618a6bd02a.json and https://artists.proofprofile.net/proofs/artist/b3da32fa-9d94-4ad5-8fc1-3b618a6bd02a.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 0x3d15cc3e13f19f75e6c189730fba72574dfce73761d05eb0b9bc44ab3bbebb00. 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/USWH18201036.
Bach Partita #3 In E Major For Solo Violin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894822df0a295adb395fdad40a4d96fa97fc299f51130f8146280c71927b856f. 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/USRO28316809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f0bc4d1a1601c2f2aa880362a1c43d6f91b11e7d720b6dca40d7ce994232db. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USRO28316801.
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 0xdafe8e517663b48da4623a9944ea6a5a9569f6f3da24828dcc3677e040c6ce59. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USRO28316802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f383bb28c44747699c9860cca89dd0539020b9d6460b747b98590541f7be42a. 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/USRO28316804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c41bf36b1c906778c4a6aa6c7ba298f2707206818ca2744fd63a22e1394b8d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USRO28316807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb175c14c389c9a11a9b45b61b27e82d0d651fccd296bb46f516fc39d69923ef. 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/USWH18401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8c61d0c52a4667b483ffb695a1b619e172394437df885b5d53e4d7433aa58c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USWH18401039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9d0282d7f5f89d778df977dfeb0e77e07f990d46fec0e51f2bce1a89643e37. 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/USWH18501055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f66441e3cc71bbd3c9f2a99b5896be3d14bce74ce371ebadebc6f54aaed702. 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/USWH18501056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe41917cfc7db948675dbf0decc12e0a9c5bcb65add5f8990fd7db1fbb672f5c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USWH18501058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a082c844a151ce72277d74a13e43dbde6bfc8a22a47aa423e12080b2e4a11e. 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/USWH18501059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c122fdf009d7efbc3c7dfc8d98dca14fb843a6bba16b27c0268fd203b523740. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USWH18501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ede06be1174085a2642f27bf342624de8ac66f260d2651eb6b370c71c0a967. 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/USWH18501061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fa6a91af1042e89c4dabaa3c82c8d2ffca38a73db14a0d1fb4fa493ea77f09. 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/USWH18501051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13155212368c99fd86a93bea34506949a8e4a113a0766a05f4b762a6c3928ad1. 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/USWH18501057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d98637fff00d9fc03baf9fb2500d13b221a85c6803c6228d0fd52ab10952e5. 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/USWH18501062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f5e731cc9a0a88fb46997adf4bef67cbd147e0680ec3f10ffce5029b2aadc1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCO99927504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5278f1117caeb812ed86ec49acc0395cc509b56e9aeb6bd15fc8c1c0bfd79df2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMBZ91443922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008009487148d181d88aeca459f477f0ef295edc64b62abff2fd33033dbfec2b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMBZ91443930.
GyroSmoke (feat. Brittany Haas & Rushad Eggleston)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22253947c24a8a2dd2b327a4df7f53183a5f60caa789359b1f66bc96581aa96d. 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/USWH18501049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe44fb5e929911aac5c2bf0915442df4f1c6bbc0cc475024a4f11fd104d744b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USWH19801091.
A Quiet Revolution: 30 Years Of Windham Hill
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd974a071c6ee692689f8844069925b789294746a07297c2cf1b2341427996a9c. 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/USWH18201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54367c154ab4792eac2a014e7ab28df83021082b4bc5f80d668a34fee9533c3e. 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/DEB631772329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29825dd7b138a9d7afc05e6e79404cf03ac3edae44603e2e03896ecbf56c9fba. 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/QMDA71448158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7088476d4e858a416a5dceed1105eb1c901fc1c016ba2c6ff5d3c9c3d3cdb42. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:55:45Z), 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/QMDA71448156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0350d1f825f80e30140a7c8827153088ace3091e48a25b2f0342fb285e0200. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES8511605576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9f7c231212593121dbb0690444bd997a9897a23267ea2d85bbf306d0c7922f. 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/DEB631772303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b93186aa217adc24b05757d154ffbe546b98cf3f778717792df1fe4c2e0e314. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMDA71448155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf702d3e45cd8d5c7c1ddfdd27754d7d0768ac92b2914aa596227d1a7288eb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QMDA71448157.