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 0xc274a1256d52c65cf0e79b35f3371a17e117fb24d3a43082d5f6c83141b96166. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/101e1d4c-dc97-43a8-b5db-5eb3d3c7ea31.json and https://artists.proofprofile.net/proofs/artist/101e1d4c-dc97-43a8-b5db-5eb3d3c7ea31.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 0x8e9757027886288fcf9d478a250f464cd9a7f4144005aa6837c6d07a39e6c21c. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GX8LE2469620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29d07a35f5ba4e5ba891fc36d8b36648f5c16a4b7aaa1afbdeec85b2c78c953. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GX5MX2433893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0183fcc97437fdaf9c8afe887d7c9fbe1bcc206777b3a6a5433ca31d1e26fa9f. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GX5MX2414090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63668052877a01f0c31fdbc50c2a19eea058d16dd0080837ad7d468e6556ffb3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX5MX2418894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e893cea5c627621529be360d7f5a302faeddec060ff7767ea4235a3bffa3f5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX5MX2475131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3cba910752aba6b293bd4c29c780641efbe4515654afe94e54129de788bc4d. 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/GX5MX2405254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc270d76e0e650345a6c5bd15b0bcee07c6e649080395ed2ced3ff576f05e1. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/GX5MX2418422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20d46c7e720639b1f00ab2644f988c221bf4bb08ff582a2c56985f68e4f47e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX5MX2442269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e020a4e0011f5fe3bca0fbac857a052d42c05c924a38511ceca156cbe5fa6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:31Z), 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/GXESV2464915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95038c9ebd88e51ff1242e8681f426017e03830a41f20d843b92040d51724a4. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GXBDS2490387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad0e540e7a986028a45204af4ba5750915479dcba7aa3bc209371930f58b339. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GXF972472121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35cf3840d56f1c9bfdf875414bf54d61d585e836db5f3a38499e15f0ec83aca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:14Z), 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/GXFHP2454159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f396d9c62280d27d2ca6bea3f4830cc765d76999d53e1fd88eaf20c6e4751d0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX8KD2599384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9869dbe20560842e40881dc910615d63bd758db9d207a53318dc23901d9f47c0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GX8LE2539150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24a7a4acb851661a9bf776a86f1fb50b956bce18797583b66dfea381522962c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX5MY2587881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c39b45be4ebb3952cab1ba4641624e484b243088c7abaed92cb8be70c81bf0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXBDT2578973.