Ghost Quartet is a musical song cycle written and composed by Dave Malloy. The show is described as "a song cycle about love, death, and whiskey. A camera breaks and four friends drink in four interwo
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 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 0xbb14d7a289c67deb3c38d6fcaa6ff3a0d25f425b3b4ca2ede684d64eb92b2a97. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20cc02ab-f7d3-4849-9557-5ab883f72f2b.json and https://artists.proofprofile.net/proofs/artist/20cc02ab-f7d3-4849-9557-5ab883f72f2b.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 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 0x25ca954f11e0e23823c2c2765c0bbe3aaefcd1554d3b0e2ea207d2b72a45a73d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/UST8K1568595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556331241afaccc75400e5a33066eb0be3703eeaf93bf923bbcceeb90fb83e8c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UST8K1568597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc26a1c89f94cbcb3efef61c109674174b020d2065654b1c82227df61bfd356d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/UST8K1568598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6ad25811eead4622cd2ead5aadac8ada3d0ae81a552d5b630d3250d0d5b4cf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UST8K1568599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daa6ba2ac62607898f5ffec9e4312af118c9e93f9fc96363949991890d821b7. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/UST8K1568601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7e1f03ef695c8e238924fdc0307de9fcf3fc8cec9c577699af7aa967103815. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UST8K1568602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ba9c760efb3a74aec33cadd3c363f59dfc570b79b8496ff79b8c7caa9a000e. 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/UST8K1568603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe825d975633925b5aaac4ddceaff2ef0e3dc5da330f62e8998ee8abc11053e1b. 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/UST8K1568604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a905e9b06c619ecfc1f2416255f103f5cb23fa8732f2c72433a7f5eeaa606d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/UST8K1568605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc376e8347671e3aee2b42f2c22a0e764a7a9966ad9a9b1b363e2b5a345b1326. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/UST8K1568606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0677344e55878d241fd3639bb8bbdb45c5eceb63dd618a43e98f79f488d60322. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UST8K1568607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48fd75cec3df449d5a8bace3b97e79508f87ed7839f82c886c2f4b100daf26f. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/UST8K1568608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb7ed2f2bb887632ec306089041dc71c58eec808c13ea15ba603f4e470e66c1. 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/UST8K1568609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0c5252507bdd4cafb59b00c2386fbb3339e28a79037cb21b5f258503cc2b72. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UST8K1568610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d2f72b9868a72033968479d7d5c53a1ff1543ff9f609221a4951d38181e5b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UST8K1568611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b7e372fbf906f1b6a42a95f08dec00a1385024263db6591a94e97479bb9ced. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UST8K1568612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159bdf47cce0071dac5703f532327f84c4b9b4eda5435cd87dd4a9f6e4fdc9b3. 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/UST8K1568613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd2b527b84e5e4c333e3857414f91ccd518d5acb20f2a189d57f6eb415ece99. 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/QM4DW1797905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612b70639d77a03f87bb042539e02b715e9a25483b2ad79a3135af308483c0f7. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM4DW1797907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17764bb51097d05d5f6511fdb366249869c45adbb29ecbcf5dad345c9e80e88b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM4DW1797908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb7c56b60ca5b95e1c740929887d36580a391d3afa8e2cc826ebe0652007251. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QM4DW1797909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf1b4061e06f0ba1c3e4c021a8746701b38d3a7844ff14bc9cc4913c11138f7. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QM4DW1797911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6686501ca1a19ba9e55ded06adacf3bc51a983fecc29bbb7f7a9bfd13f70e1d2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4DW1797912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ba9cf3b1100a3573960a5c978d87b24e9a018e41f78916f04affaa99c40ec2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM4DW1797914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1346226ef9dc6ca4da981cf0ce376d660abc9b6705a803f3233f1d853af82c9b. 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/QM4DW1797916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87193cdf6394dc6b33fd674de00212fe537290f3e0e7d723fb5dbf920999bc14. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4DW1797926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bb63344bd82f0024b74779cb70405720e2fbd2255f3c449237582d00aeae19. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QM4DW1797928.