The Singers - Minnesota Choral Artists & Matthew Culloton
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 0x17e6d25127c92d91eca1dadb7182e61fefb430c8865f8d842004b518a5e8b88a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/712f8459-b1bc-4b2d-aaaa-09300c5584cd.json and https://artists.proofprofile.net/proofs/artist/712f8459-b1bc-4b2d-aaaa-09300c5584cd.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 0x09ed12ce1e38fb438802d8e3aa1d4aef94051ca53ba8be82e67676532ac19c5f. 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/USWSB1300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a34120099234752c554651e8fa4faa9b80a31cf08418735b59124f561fee84f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWSB1300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed51219cf319333e7f9891ec38b86aced997c82cb0e190811c4aafb2befd3f. 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/USWSB1300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd5d1713f1bf8240db2cb6f640852f6dcbaad2d508c8e0c1f977316e0751f69. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USWSB1300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ae6bb41a24d130100e8bb9788e60d93de16736b5a7fe7b01597396a1965ff1. 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/USWSB1300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044a3a0621e0982e25ebd8a05014454c5e1b9602a28e5b9c8a86eec407f1e33b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USWSB1300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba76dd9b33d9778f0838430a9c7e9784b059072fa9c07af1cd824a4bfcebf59. 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/USWSB1300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5893074ef89e272be4b6aa8c3049b277032eb12ec91e603c309e6b6ff63dc88. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USWSB1300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ced660570093dcee729f42c7836332282f7f61086b2f08d2b0407be8ae7d063. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USWSB1300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6c3d92db898138c0221f3b864e284021fbdfbefafb21a5e6f510de86b032cf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWSB1300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9813d1cbf1855749c8ddee4013fbfa1f504f6f41e34c9fd2d6f9a3fec0e4e287. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USWSB1300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b2b3d0bf78a2f1a652f9fe6d50921ba4fcebfdf1265952177d6f8d3b04d190. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USWSB1300117.
Dulci Jubilo: Christmas With the Singers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579a8db957f2e32d8dba1895772245111739f20d217f9bb66ef01a4d7d9b8287. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USWSB1200202.
The Singers - Minnesota Choral Artists, Abbie Betinis & Matthew Culloton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57afe9cfd7f2f9839a62fd4a05e2f179bc1f597b59f37c3aa84cf84216829d38. 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/USWSB1200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4094b161d2be9778e4c7a656a985f75dd82032179a703a929e6991e60aecfe11. 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/USWSB1200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc615c3d0f036a9eb17cf626f9b99a410ceeb5c8fd6fd86ad2ebc6ac8a4738ae. 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/USWSB1200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde6302afe99861383b47b8836f5a5f24499468dd777afbd7536f5bcfbdcc44d. 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/USWSB1200212.