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 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 0x3faf7765b76f1a93cca25c2b7961c283ffe2b471d0096ff778e5711a011003b7. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dbe5980-e1d9-47df-beda-ad7445e94cac.json and https://artists.proofprofile.net/proofs/artist/4dbe5980-e1d9-47df-beda-ad7445e94cac.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 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 0x74cf4b9a336c8067507bda25d861015ca148217a19ba233a6b52396d5141089c. 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/DEC959300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3dab379f23c51d2aee215b7440c775771cc4a123ad29e6d29190d56d2ae6f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEC959300516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab1cc8a9bdcfea706dbac8593ea551b1b2083bda60d3b66656f81db1f1f2192. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DEC959300518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c7e276c9b832e8a24d0f4144d1ced099fdb6d529cc8580798e1765de11ecac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEC959300519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905db833f7de7d4aa89b9ba146748a74ad6537f39edc9f4c39258f41cf275297. 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/DEC959300520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf162a8f66c6b413de66898227c8323114f7e44b11a0a3ae0f322fe386257547f. 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/DEC959300521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedafb04a8a73ba304abf4fef9196bdd5639dc2ff09fea6d7b23b2c4a119271f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEC959300523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd76f7fae4351cf885b57ad5126a296662fac00b573270915648384db359812. 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/DEC959300524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a423bf9981819b143843623b948d46413d6ceca9c4cefc6516d4d5e0ac858f8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEC959500646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2680295978482947587c7413f45b97f902286a081ef6780809f5940b2e5ccf41. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEC959401012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700b0480231ad9578b4a994608987f10c37622a5e8e4e351758c81a41c3f11ee. 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/DEC959500635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd418da16cd689aee4ae21a4121cb2b611c295a587e6f172868b7dfc853969815. 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/DEC959500645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ba46b8c703d277e1b1c063ca64baa1b8cd9b2702581fd2f15e672491ef95bb. 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/DEC959400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb7e831dc1c6cb0d192d2d1520a35d3b7b0392311477e9c39bb9252c9998b77. 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/DEC959401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd616867deef82c14097b8af2c640c38847f11b89dc4eaa56dbe594b3cf96e23f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEC959401016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2680295978482947587c7413f45b97f902286a081ef6780809f5940b2e5ccf41. 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/DEC959401012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd11daf73f67358ccf5e1bf67f899abed437edd261e2ba6182e61f0202f0c8c2. 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/DEC959500622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0b5f750e51b989bf95b7f81d3e4801917069b95cc71c903f0cffdea07ca04e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEC959500621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cdd91dc46b9f3d3724b8a8333757977daf53f923915b500216c8a83fb28113. 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/DEC959500628.