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 0xd3d3e756c629fd08117cb130a4ca106f5f92ed18e35675d38e8fe7b413264403. 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/7c894ada-d7ac-4b28-a87b-f4f38cd522ba.json and https://artists.proofprofile.net/proofs/artist/7c894ada-d7ac-4b28-a87b-f4f38cd522ba.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 0xaab8872e99c0d9f02afe0b205512d462835cd6b846a3943c17e540db940e366a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEU601505429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe1c1c8fafabad5ac6ce9799d3b64ff2e8c58cf0d1f560539337c993b7f4bf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEU601505433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b80198532126b9725e5a42546fbdabdcb9bc439b7af2558bc99bbfc57988509. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEU601505435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7199b6008a7f0a690b25bd9cd32735a9ba7bc0879d93df4b784f2779314650df. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEU601505434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3694dd6384e6132217d06d9f73f24ae39d136da05c608237d886694aec91b5fc. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEU601606553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7f8a0d83a9fd656e7c10405025bd798746ea73d7f6f3b73e768eb26625f3bc. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEU601606558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8ca3ff432deb6bfea114215b872bce027f6a8ebd191c8cf5ed03f27dea3873. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEU601606559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561341afe53bc18f112f073541a2b90cd5e001f384e1c7cc3ccba9995d734ce2. 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/DEU601706987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8ad5a782c01230d0935366eb824a50bf939ea535bc164115e507c466be9519. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEU601706989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cf77bffd6bd763c7db7dace054301e4278543e9cd7f99da3b8af9353df8cb5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEU601706991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99268a0e35e08deeaab53742677b5714d6f754c56b467bbd4cea690016f77420. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DEU601908574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a76d32d5a9657de903240150d7cdf59eafaaa5ad660cb4b3f4065bf7c1177. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEU602109796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3e1c15d921d3d2af1e918201119ff9dbeec024018271892b168105f0a0e484. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DEU602109788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe4033785e1a91a835931e18c5cce3cade8f28edeb8808c711d028466a5691d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEU602109789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d141ede38ee9e55cfdb68a85d24ed087a161ae1814b37c4d7f402e9e50ad4. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DEU602109792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f2d901ff3c6c6f1afb8eefd30d25ee7f04419d74147abe95d1a2143669b7ac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEU602109794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d96b6c27d6611e5d8ee8afa6c718cca5940aa81e3d1cb20ecddf32530be36f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEU602109797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e336b76a380a2a47f43bc30ce2166878cbd9892c47d604de4262d16d74dbd8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEU602109799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baa5c422675d210ee9dd31283c99f91fc47211b6c08ded2450704c620144dd9. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEU602410988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22021f645dcd9a49d6834e5cd3802efbec81270c56e155ccaefc4ef06e94e779. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEU602410995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b86531e3b5b07d339d225617703cf50a19e2f9a372a91ffdc4013d1dd6ef6dc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEU602410989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767877c1f95508184ad3c59261a34204896a9dfe81f3b2897a75c02c7b997481. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEU601706992.