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 0x5b879596cec8212a012ead59b39966eff9de9f39621615f9f5c4d9dcb63be8da. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f03137fe-56ca-432b-87b3-1ad8ae56794b.json and https://artists.proofprofile.net/proofs/artist/f03137fe-56ca-432b-87b3-1ad8ae56794b.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 0xf7a2c820b8a530422d4fc686ac3a780ffadfe3d41a48c613ba44dade91cbac02. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ATUM72300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ad78dbb4cfbc203339d2aea74398302f307298d487e64cdc668690a75e74d1. 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/ATUM72300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdfdadfd0eb472e00db2b8f66b3a5279ef4adfd1ffb0f63f500b24ea876aafb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ATUM72300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c04c94c99c5397d6d66e5fb5f64ef656ea40706883fed52fb57f8aa4b37b35. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:58:23Z), 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/ATUM72300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76f0165965e70f5d4a90aca3510692778a965e3afb1862ea7a294148de0ef44. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATUM72300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6a77ab748fa67e51fd4817c19a43f77f4f67062ef6d95ed1ef92676158c095. 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/ATUM72300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7607fc216947f27eed7789b0130aa279f0850b52b256a6ff29138825a2edc2bd. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ATUM72300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8ad9f1b0c67e8e88fa8acdbd545047b80edd45d9e824baa738d6c171fe3cb9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:57:40Z), 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/DEZC62580695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd1d5a85ddf0effbd01bb0d89a436301e3d97a0e0c8428f162ae7e3766c598b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEZC62580694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc017befd19a75a53964279b13db3bfa83d8856ed048e09c2566f8c74c30c62. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/ATJJ52500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe790633b7b4212389936f6184329e9282521eeb285f7346e391445f2abfbcc07. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:37Z), 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/ATJJ52500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ee93f1808a1161fbb0fa3ea5770c27a48643fff64a95cb62bbeaaea821f32. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ATJJ52500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa657b1fb3d951fac72c17f63f7f97f597ead7d518f3f7c4e20495543100398cb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ATJJ52500085.