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 0xd71d164efdb522dd2e9a5a5d6b5557e37cbced644f5a87a2a17a1a8fafb4f7d7. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd53a817-2124-4bbd-85ec-8e73af543a51.json and https://artists.proofprofile.net/proofs/artist/dd53a817-2124-4bbd-85ec-8e73af543a51.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 0x0e6a394499a997b399017c3fa90d9fd76b921e596c1e4b256304d5f95e7e4d78. 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/FR9W12152195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110132e3621c043500925d31d67aa40ebe6d8496bc14ad5156654ebfde1faec0. 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/FR9W12152196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270c347fd67c56d1968defe0eca6092bd3193fc45817d1ddd432ec2974184c19. 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/FR9W12149612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4215f2f0f3a06bf54c6f409446955518d22b991426f8ec18c3aa356fbe4e356. 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/FR9W12152200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aa69d3d0bbd1a813e8f9045d3c4869ad28753d6987fc6cc8813c53292d02a7. 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/FR9W12152201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d49afe31706214e49d9ca76485d11486cccadfc437d24ddd9f9514cba3ff8. 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/FR9W12152202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3947841bf516e3130c11ca7f16345b731e732e7cfdd3c4897f9beb0ed54a6d. 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/FR9W12152203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a2b358ff278139a3f021081275992ae1eae1b42dd8d522d6f67a8283949945. 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/FR5R02401484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4215f2f0f3a06bf54c6f409446955518d22b991426f8ec18c3aa356fbe4e356. 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/FR9W12152200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270c347fd67c56d1968defe0eca6092bd3193fc45817d1ddd432ec2974184c19. 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/FR9W12149612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eb96e7f4da6105fa00ef7204775683b4d14e16f9445f77158c9e8169535342. 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/FR9W12149610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931ed8fa8de84d16747616b2a4897edc76e8f3962a7eacf79d34aed0e9eac4aa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12001725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9160f55b35b15273ac32658065fe7488b760237af629afa4a6e901b1059cf8a. 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/FR9W12001726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d96fdd9219adb1614ce81c18ff34608f50b93cc342481a249282268df4957a9. 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/FR9W12001727.