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 0x9cc2cfbba9d1372e58f7b6e3c6463cb94e511b6fbc8e82757b3e7e88505866c3. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9259d3e-08ad-4ddc-899e-61541e5ed4b8.json and https://artists.proofprofile.net/proofs/artist/d9259d3e-08ad-4ddc-899e-61541e5ed4b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Arkansas Traveler: Music from Little House On the Prairie
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 0x6746a2703daaed72dd480c368ec6947016b596e1b9005f5c43d3b450bbd52bc4. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USGMF0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ee788dcf670e041d0d37ce08df4d65f70ba4ee6e73bf991aea821730271380. 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/USGMF0700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59598b0798952364e8bf0b2b704b9201132ce63f70b34b32827e1b41f39ddb2b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:18:11Z), 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/USGMF0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355092521ba5282d34202105906c4483d9b2d19955c8409804a1f1b099624d4e. 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/USGMF0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8aef780b699dbeb96218c0174a39d0978cb664332cec15c1b00be208cc0b54a. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:39:56Z), 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/USGMF0700005.
Nashville Mandolin Ensemble, Mike Eldred
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad42a128651bfea382030862ae973ac131cc039b1810c5168045632b3601bec. 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/USGMF0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1733f3beb45c10c60bfc5ada5dfa6bdf77522df6eddfb252718b0a6a50f368f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USGMF0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ade798febd38fc4a8736ab04cf0c6bd41f8681f796ec47fb36ab4a34bc0a1e1. 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/USI4R0502310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef5301117ba5a5e1ec83e42ac28ae6e046b84be441f19aca06de2f6d6f4a8d6. 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/USGMF0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc45e0c72de7daa1320095c592efaa0a31266961037633920e1b7a8f580a674f. 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/USGMF0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5373d4b2a2e267d85ff1b317a6c9b4ebdba478e5b9811af2442495cb6e25c82b. 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/USGMF0700015.