The New Basement Tapes is a British-American musical supergroup made up of members Jim James, Elvis Costello, Marcus Mumford, Taylor Goldsmith, and Rhiannon Giddens. The group known for their 2014 al
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 0x3afcd68a5275b922e58a65e97593afa8b72a4a5910b329f91667d8f47e00b4ae. 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/5b9473f1-c6c7-4575-81c4-bb43b9f4743a.json and https://artists.proofprofile.net/proofs/artist/5b9473f1-c6c7-4575-81c4-bb43b9f4743a.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 0xfe4648ac22db203332280100427df0755ff747b74b315e0a014647342ef3b1ab. 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/USUM71411793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2f651a1d1b151fe9fb68c21fa88e830e0260f15ddb439e062f1e270fed6080. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:07Z), 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/USUM71411795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3defafc2e90ea107252f03d863d2232811c162ae45f22f3b51d42c16d04724. 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/USUM71411805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca87054cefae354e1923adab9c65a8c067adeb730ad386023b062c46080dbe44. 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/USUM71411809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f900feab943d0d5b0d6bd9777942bb0ebe51a9e6a4671f9f8bdb3f7cb593bd. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USUM71411812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf828eec7b281ada75e15acec82fb5e18f5fda5fb9016d54c438f95fea01e6. 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/USUM71411813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cba2c0f6b11e9a8ac3ba56b6bec4318ed8a3a11f96dc0d7ebcaf33dc3b3d481. 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/USUM71411821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4648ac22db203332280100427df0755ff747b74b315e0a014647342ef3b1ab. 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/USUM71411793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b3db8a6b7ba0d5f26c4932b5072723b9a15f7046bdc72a74f75591e10350b3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USUM71411810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f767d318ff28b9d21eff41dc3f7c87b149274c91fe5d5ec1c84f6b50c2915a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:33:04Z), 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/USUM71411814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1f284c6003b9705908786a821207085eea94c8a1bf8e14476c20fff98e0d79. 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/USUM71411848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cbac7c9387867707e8888e324eb8f334c332345ec483445fccf7cc3f0eb24b. 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/USUM71411815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb937e34dd8aea9a9f81984bdc9f7281441f6cb30d5962271016e5c6543c53ad0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USUM71411832.
Six Months In Kansas City (Liberty Street)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc565d15f664528075ae7a70375e6e65ae13939fd604f5df28362017b0c64a7. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USUM71411846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11fc99e9b60254e58b80a36226a84dbcc1bce0daa261f89f51d39e01ab6e4f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:29:00Z), 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/USUM71411847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1e9bea9242802c2d5965633098d7774b69d14a1cdeb09f20639dcc912ba210. 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/USUM71411794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4838e7baba7fc3c510136aee0710561591790c886fa590c0d5ac5224538ce5. 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/USUM71411792.