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 0x1657d8036449ca7726f31983e87bf7a5de5ab134c54a8d1a4913bbc8dcfb6c27. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b12a3950-d562-4441-b84b-31ec1d715825.json and https://artists.proofprofile.net/proofs/artist/b12a3950-d562-4441-b84b-31ec1d715825.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 0xd66f7df5df57ceef7c1fc5ad473fe52d1e2bc2214023598348d38cf1576b5bb7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEU340200232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a785437f2146b4be1b6c35830b48a33ca08040e761f95374cb0ec1b9c4e35f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEU340200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ff2e9d1906de51a90a5d02e0ba390075357d28d3f87405d8d1c84c3520d582. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DEU340200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3793433e111d081767f7e2d5d72e3e1f0a0b8f39f53557e779dcb77615864233. 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/DEU340200369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6239743a9944ad45d9ac644a4537a5587a06ffded5d0a6ea1fccc05f70ec7a5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEU340200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbc9acb694ca6ef08f1f2f456ddb22811a3b12030c2f835caa5ecb8296493fe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEU340200372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b88f6f877efdd37798e63f58b7f626e7cf302137f24185fee53fd2d3a5c614. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEU340200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6996a7cab4c5069ed65b248c34c4c8572bb0aa610233a66059d8831b0d9a4bf5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEU340200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e36066e491a66e3c3bda244a8aa06fef7a9dc12c7f4d652a156756bfa814cf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEU340200378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2521bdcf25b9cac36c2e31623278d44435797b856babba27349178569c23f9. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:04Z), 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/DEU340200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cf374106f9ec86791168ee9d9acf7d9f3e16c3bad6474561fab479d7249ca8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEU340200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b0419719addf8d5b5b552bfa4fddd3bf1613806578565ea3ef60ec3d3304fe. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:25:48Z), 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/DEU340200385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60f11f86c84201fec4fee95631f5989217d4465fb513d63e9fd7d7b38a05919. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:00Z), 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/DEU340200386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef03bdb3e1d319e99035ca566f5e73a18d1d24bf94d64c23859c2b5b14f7f34. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEU340200387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f74c9d8b38b004c319ef0c08ca81a1346ddd6c0f06062354806cc319e3d74e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEU340200388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee4be991e51c37fdf22bf0aa18c732b0bcd782b86763f0427deb8269e0fa035. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:43:11Z), 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/DEU340200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966c56837c10e447cef6f80edd5421b09d858d4dd9b951feaac2f2a7dd7874fc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:28:13Z), 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/DEU340200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9fe4a6ee778f9fa5a655c4d9b95e4fae64d482987dcf2c6b7b516da974aa09. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEU340200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9893cebc83e49eee56cb7372674940cde5200ed7cc5acf6f955b55d907c3a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEU340200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4f509a87ca1d8b8e2f76f7732ee81a3e05df065d73c1fab1f4c2bbaa22c7b3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEU340200400.