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 0x8b1cbdc68b67e55740fe6dc914772467f9488756dedb9407f594e0425cd53a5e. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d3cbabc-4c41-48ae-ab60-4a5874ec935f.json and https://artists.proofprofile.net/proofs/artist/6d3cbabc-4c41-48ae-ab60-4a5874ec935f.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 0x6127ebb43b2f5bd82d04db0b01a6d03f61fb675535fd2b40875cb3b61e8e1f6f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMRB31500004.
2008 Texas Music Educators Association (TMEA): All-State Mixed Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e591fc719819494335564629ae3b37a4a298bd8e9831ad2b2f12959bfa88f0. 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/UK4WW1510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd85c0afd814f108e01f939fb536b8d12c03df7c581502be8cd0adb58e5eb33. 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/UK4WW1510003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6779692dccd5510f995b19ebaeb41be9a7e72c935ff1cc5daf159afbe8889a38. 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/UK4WW1510011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58a3c207e5b1fdc5cd20da97758ad2840a199899e3fd677bf9d641d19d9c64f. 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/UK4WW1510012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749b1cd58df72bb25f5551ebe56934b23497ffd3ca8275d06a0cb963873f77c9. 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/UK4WW1510014.
Wayfaring Stranger (arr. Paul Smith for Apollo5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5410df59fcd708ba8c61cd1bead6dda1311e30a80900be3eba681a6380c2cfe4. 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/UK4WW1510016.
Homeward Bound (arr. Paul Smith for Apollo5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf24107331fb8046023e37ceefe943dd56800473bb6dad983298d8b976e51a7. 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/UK4WW1510017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891a87a28a0a97dfc2b236d06533fb44c711858e613d05b88c1ddc29ffaa6b91. 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/GBXSY1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daecbe9490c1dccac8f5d1e77b492a5e14113b3904a6bcf46d298a4cde840be. 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/GBXSY1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dcb35eda431ff30e8031d325d479588efb335467f7a97239538e4a5feb8bf3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBXSY1600011.
Pilgrim Song (Arr. R. Murphy for Choir & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da51d42479f976b20c698fd375c5980df80f9e2cf5ad39cad496e0714670d0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USRUF1010381.
Lead, Kindly Light (Arr. M. Wilberg for Choir & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111f2ab4763a2aa55275efd4e267b827f8b12f5440cb71b8797dc49f1cf294de. 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/USRUF1010382.
Homeward Bound (Arr. J. Althouse for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bbf7a5f36956e851fe287e1e1c01e59597d4e0aceeef960afc128ca821b630. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRUF1010383.
Tannhäuser, WWV 70: Beglückt darf nun dich "Pilgrims' Chorus" (Arr. for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916f8c39fb6a44415b1045dd97ffa9eac286abddf2a7e84368e4ac9ca2c71646. 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/USRUF1010384.
Saints Bound for Heaven (Arr. H. Helvey for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe53ac718b65b57d38680f408f2d3ce7d50ad72a453fd60bcc498d2b912d8c7e. 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/USRUF1010385.
Ain't That News (Arr. S. Hatfield for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754d0a94fd05501db2cdc601feb7544e0ce4547e273f9b9e9b5298a9c8a3f716. 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/USRUF1010387.
Have I Done Any Good? (Arr. D. Zabriskie for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abec4110bb122fbff226735c6b01a9c946719668eca7f377fe357235c5929e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USRUF1010388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb75e4b96c653b9c204c3bca2a5e2acc8fc67eafe4650a122b1bc6add33c5f53. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USRUF1010389.
Hallelujah (Arr. J.S. Applonie for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3191c03fa939361bf62a49843b90c9a59a7e4b729861076897c75e4aaba05. 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/USRUF1010393.
Come, Come Ye Saints (Arr. L.J. Robertson for Choir & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096dc4a77130e2f8eada4016b9cfcd2675929910ac30a8660bf292de95cc0a2c. 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/USRUF1010397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b5d9a9ea75cac3d4df25559619f6221f05bb1fbb4a15056a0b123a1350f415. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QMEU31923984.
2013 Texas Music Educators Association (TMEA): Griffin Elementary Fifth Grade Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed40105fa61df18889992e15b5eed7ccb6c00c987339759c978c89528b86aba. 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/USVZX1309301.
Homeward Bound (Arr. M. Wilberg for Choir & 2 Pianos) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2b8187615f2a6b1d02bfd88432e705646b810ca48eb7e5fbb4707548ce770. 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/USVZX1615419.
Take My Hand, Precious Lord (Arr. A. Sevier for Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f6f129a4d2f63f34907dc328a756fd38bb0f7e172d4af0c549f73b6bcf030c. 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/USVZX1811117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2b8187615f2a6b1d02bfd88432e705646b810ca48eb7e5fbb4707548ce770. 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/USVZX1615419.