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 0x5d8e8cd5264bf3e5bf1f40fdbc24103b45eebd1c039b99e475b55ab0a54816de. 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/c46deddc-0127-4049-be0f-862a883d8112.json and https://artists.proofprofile.net/proofs/artist/c46deddc-0127-4049-be0f-862a883d8112.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 0xf030245bf8904102ce770a08f1c27e7961b364657742015e8314d2b3ce6f3b6a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX452004366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3bfc154c11e41ba6974f2401f1883e44ecfca8a3edd534c4a6a4511674540b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX452004367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cec6f1fedbd911dea0a12c1b6677d365c68b45cce587db485ffa2bc68e149e5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX452004370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c20fafb971c140354262c620236c6b20cc8107b3df28d0ce88939eda5621de. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRX452004371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1c96ec1155926d76420bb54b36dc61bf4427a66e2d5e08029873f2e6c3ac5e. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FRX452004373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e86ca3c95eda276bd26314df964f0dd3e23d4b9380fa45b253ce26bedff60d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX452004374.
Закарпатське весілля, Ч. 2 (Українські весільні пісні)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5569af47bb07f2ac148e516e5cf2788c08ca392e7c47cda033d204c67316ffe. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX452029971.
Закарпатське весілля, ч. 3 (Українські весільні пісні)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefda6b0fb3c7f1e38b161496cd5925231b7ac0e8d469cbf504318535194fae63. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:23Z), 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/FRX452032270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a42b411b2528ec2b69c5c70ad45bdcee49bfbd8143fc3b2346b6bda0f1dc9f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FRX452032276.
Закарпатське весілля, Ч. 4 (Українські весільні пісні)