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 0x5ac0fc3efb03a554d88e75c58ce5941206fcd84fbe1eff7f2882ad0323861c1f. 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/5dd16ff9-cb65-4b7e-9986-e60ecf27ceae.json and https://artists.proofprofile.net/proofs/artist/5dd16ff9-cb65-4b7e-9986-e60ecf27ceae.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 0x30936cafdfcea9582becad668374f4aa3ede6c7f4054a5470138b525b5ba1360. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX3Q92374150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb881d6aa67db8245f98d83d60b3f062e3fa9d3eae872048185ec30336b80b55f. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/GX3Q92374151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43160b61da823c5e44ad99e2ea734f844c9fd18db4f851e54663640f30cba756. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX3Q92374152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19979e740c27a0d4f8df7e226ec9b00bd37bcdf38db8dbd9ccb624047288398f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:45:12Z), 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/GX3Q92374153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dd95de5cf6dadaa1b773264076c7c8c1a6f02ae62c291ccbb2cd569008132b. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX3Q92374154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc754426bfe5903032f6b675b898035ad938104592c1603b62434c71334b619a2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:00:36Z), 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/GX3Q92374155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4028c25f631de36633fc1fc10057796150f65805acb1170759fb490999c76e69. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/GX3Q92374157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915bccd02c104dd781302290e0e44dcf14958e5ef5eb886fb38eea6607efd826. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92374158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df61ca06aaa6b7ea9e655e523cf04305f5570497fc2a326b18636e4c3845db2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX3Q92374159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711518881f6c53a85b9f3ccd931eaa8d8ed76aaf1b41c6192e56022f855c923e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX3Q92374160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfec8c92975dec6b2ec397f02391587c8093249b540004baec5556ce90d75d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92374161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddfd9291b2ff2f2009593c6ea9280a4750ad9dafa6462880eda0ae66c771037. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:38:41Z), 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/GX3Q92374162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e03c47da02786aa6a016105a6ca16b382481f664bc96567a82ad39127b984e5. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX3Q92374163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b971f985c3bcac6e913642af5ae5729c3cd174ad198ed2e817975912ed432d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:09:12Z), 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/GX3Q92374164.