The GRP All-Star Big Band was a contemporary big band assembled in the late 1980s by Dave Grusin and Larry Rosen, the founders of GRP Records. The band played new arrangements of popular jazz pieces f
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 0x7fda251bb19f5848f7cac55badf611b092a30a837780eebc1b79ced67fceb8b5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed840bc2-7686-4413-a877-5e77d87e670f.json and https://artists.proofprofile.net/proofs/artist/ed840bc2-7686-4413-a877-5e77d87e670f.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 0xa31e44f7589c7c5a70df576be2f48f189e15bac915d191da397a585a6a3495f1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USGR19200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4870cfded204a78d64d04096ef422ca2ca2c3c89ac30a2615a10e03793864044. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USGR19200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63410531ba9418f6408a4a826a82d6f1a1754a8be263ac69931ad9c4f0185dd0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USGR19200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03649b7b95ca592602c63e867a05fc8be54a755d57522b0623bf9008171248b. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:40:56Z), 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/USGR19200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacf78502d70d5921b2416f100e34c8be7c39ee9406eda54bff2e5bb2879137b. 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/USGR19200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02b421073d3ee7abb4f9b4deef402df91f9f1c1f4b071df05241838588650b7. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:23:55Z), 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/USGR19200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562b6e73f9c582ee84f30c38e9616e87407ba89e82ff496b6d26ede25abbf61b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:52:52Z), 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/USGR19200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1446ea70628697befffa02661c3cb1db9c43a488b6c7f42e0180bf3196fb007b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:35Z), 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/USGR19200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044017134717c786f7060ed76fe0c6c8e505da6a9e1d594486cc852ff961796d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USGR19200078.
Dave Grusin Presents GRP All-Star Big Band Live!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2146d20d3c18bef873d11d76ad35a4d77987f7cad3d2c6a60ce89848e001b4b4. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USGR19300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052c05d1aced7777a81c7d2da4db63dd2e984dad97479d173737964f96ffe148. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USGR19300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3883db0bf49f2566262f90924748128975bd3a573d8a15e18e549ebb1d0050b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USGR19300040.
Blue Train - Live At Gotanda Kan-i Hoken Hall, Tokyo/1993
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66851ea78fca1ddc9cb3db8993786c5f1a52989ebadeb4f958b91ebec839090a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USGR19300041.
GRP 30: The Digital Master Company 30th Anniversary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66851ea78fca1ddc9cb3db8993786c5f1a52989ebadeb4f958b91ebec839090a. 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/USGR19300041.