Psychograss was an American bluegrass supergroup founded by fiddler Darol Anger and mandolinist Mike Marshall. Anger and Marshall had been members of the David Grisman Quintet, the band Montreaux, an
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 0x6efa31d941f947036ecab10e3363025e01a5e7c2764e19e16670f2b04e0503de. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e1b6bf9-4249-463b-8b3b-5b12ef1ef588.json and https://artists.proofprofile.net/proofs/artist/7e1b6bf9-4249-463b-8b3b-5b12ef1ef588.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 0xc99b9f9d63fa74befd63753d1b2a881261544e3af73abcd2493291b571733209. 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/USSH50287249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d57660d76996e2c7daa9e1920e8d6201bdca2b0f283ef7038d80641e6788a7d. 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/USSH50084865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4154b626cb9798330f2e8943f0a835689a98718ad21193ef64e20455e0d429d8. 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/QMBZ91376318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb346621e9d979e6025d05bef3602732f75ec21c66387872ba9ef68dfe82f13be. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ91376319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7e277fa88885d307bbeffa4fc83440cc3f46df8cbe4a49089d7d5630b991a1. 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/QMBZ91376321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585729ab4e4ed6a5be07f152c3f5456834b89e02eeac210bbb993769452f262c. 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/QMBZ91376322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97def8972a02ef994f8e614e45731370b559d896b3e42cee670fbb3fe9903fc3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMBZ91376323.
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 0x76f223fb028a26d4699dd7c0d2e2c97501cef5685cc0a70083d53095f7bfc88e. 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/USSH59642579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82df39a9662fdd63294559d14482ba986d6d8cb04b4954cd40d1be4969fa9b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USSH59642583.
Forgiven (Stuart Symington's Summer Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00cb56d959f987d0335d7436b55d9985a2b08c73cdbfc2a35e39592589dfa18. 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/USSH59642584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f57d9576d9c37f8790597f0419aaaae69f7da22f395861e9cb9d7e2768f43be. 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/USSH59642589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab38aa7129aba5c7c969e19eb50cfa2f1343c63f9b7a14a2cc99041205d06a4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSH59642580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f8187a8828c6824249c1920e2c4b2c6eaf0fe0076dba0de9527d85a8e6ff86. 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/USSH59642585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4703a1b1ca053bdb7f5e9429a512a541f315377fff9a28772bc751f49dcc49. 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/USSH59642586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86193bab2cc3de3d5efa84cbcc3a9530f7350bb5ed0e2304f25d6a0da1af7464. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USSH59642587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b88bafbf3b8f079971faff6156138f91b588a72bdbd3c2516c709637c247f6. 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/USSH59642590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2767cf0c609c1aea633b1f2574bb6747a658a03e6a5fcf8e10050225a0c0b620. 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/USWH19301033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e9805b662ae68c7cc59301e4ae3a18207d0de09ff5ffdf2b2cefd7e9f7053. 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/USWH19301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8749979921a4d40f8ae0edba5bd518cf9302588bcf22a4ddd907d6555726d6b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSH50084495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401ea2c6450ce9e381941a1d886ce21a094acd6a4a9aa203ac4d6877590957bb. 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/USSH50901138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163bba163472917bedbf44a9253b9e053cff3dd1a42e9a71fb99b60eccbb5c7f. 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/USSH50084470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6606980d2d0addb486e139d3b5b2740e0b3203466a9adbae5cf400cef2fedc. 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/USSH59642787.
Five Star Newgrass & Progressive Country
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3f617ed05c6f5b54ddf1357bff6d66e54949eb87d257cda5be36ed16ffa5c1. 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/USSH50403309.
Tinsel Tunes - More Holiday Treats From Sugar Hill
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61aa6c6e51d67efd14d88ad7c5878601a2757bc7c6065ab8e75ed037d6431ea. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSH59642779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3c95350a25766454f886ade14ba99178ef0f747c8a8d2302b71bbd51a71b6f. 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/USSH59642783.