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 0xcb6ba8fae51fd3a8467eb3e3c1b2ae3e88692b4ed632389231ab461cdbf9042e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efb153c3-a73a-4b6d-a5b0-53e1a782f32b.json and https://artists.proofprofile.net/proofs/artist/efb153c3-a73a-4b6d-a5b0-53e1a782f32b.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 0x233a971b16213b56f8fec56cd903e82d7068ebdd2418f7b9bf6b6d6c523a60fd. 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/US36T0520002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1e48bdaf62b5ce18a1d66fab19b59dfce38ca30f70d6b66bcb3562de3f23cd. 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/US36T0520004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fb16219dfa70763fd9c1e713d90f2d566c8fe4cdc69b94790ce5b1ab4c572f. 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/US36T0520009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d5020782a4f1c034c916c37ea9b99acb12b9d6a68c1f2d88d3934a76d7436c. 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/US36T0520011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc707243af346464294dafc01c454dd1abb25cee9f73308a191ee85d6d895bed. 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/USA560960068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc244ce6139bd73aeeb8a44490499ea913148a6ec40c25c0f2b59698952f7b7b4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:59:31Z), 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/QM7281674486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb8963a79895f0780a6a32be6c934f24f3be8497590d1aba6fed534fc02dada. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US36T0520001.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb807d781c6a6fbb35cb247678564c15ea4ec666461cf728ae026b781f19a3ee1. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US36T0520003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea361c5a66022fc6b86a7165e9d91724598eb893e30013d109216340c5b6e7d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US36T0520005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55947cf2c61cc5e1d58474da57284cb6f623d926eab0df041d3d7b2e1c611a74. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/US36T0520006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490daa36bd16fd2e9593e5c40cdfc301996ae3f897b84a5a25f301223cda5edf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US36T0520007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8319a03d133c50a95f0f8ea3b23a0af345de5e0a3a8ab74882cf33350914f47c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US36T0520008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25fab197e3978d351686a04d0def548d536b7a771e7af56285db9861d12d17f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US36T0520010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4166ec0bbd545e125d4f6500bb7f19c80bc3ce6e51f1a7875581b61ec8e41ed. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US36T0520012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddecc7f8cd197327185b5a9431df12335bffb404338dae059d295a8f4ff095c1. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/US36T0520013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f3ac1f5ea7f93e1fb9b3c7f867d49759ecbed95db9126c1ef9922bf6a7eec. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US36T0520015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cef6bb685d53fd862a33408f9a40292c59bbf918ef8c6c08e96e063b6e53af. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA560960078.