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 0x533b6733388e960298b3414c203385e326e3dff95f33e907a8f9ba709e591b81. 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/4edc5c59-35ec-4a9e-976a-6150e9399253.json and https://artists.proofprofile.net/proofs/artist/4edc5c59-35ec-4a9e-976a-6150e9399253.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 0x03bf532839918a8e20f9b393da963efd2b2625332ad5d1f9e4d3f7b0eb821abf. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FIJ2X1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d58aae32b3c5619d26540ffb5e911126724396b4cba32af5766f1814aeed1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FIJ2X1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917268497eccc61a9240f7d0bebba6234bcf161435d2cb584bebd6369c535a98. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FIJ2X1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3eb7d2fcc06888f2d5909e0aaf1bb087109841034b8987d57e1471e6024a44. 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/FIJ2X1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5edf9d82039214b17d690477c709b85ca7bd56c1474dccdb95ab52a0f265e9c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FIJ2X1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ae423ebea00f96bb8c0d5bec2e0fa41801905f223625175a0ffe606d717396. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FIJ2X2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc8599a733778abfe667145c97df14e3689b5ef908d5fba3b30c3a82e71610. 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/FIJ2X2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2276a3ff890b9ff36c9ea55d6f6655aa3469791e13e0ee746600acc1b75bab24. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FIJ2X2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46441160cb5a9758234668f32ee5a0f034cdc79ae8468b625155ec8b137d0969. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FIJ2X2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea72945e977166923bc1dd362080a09657b58fbd539e5cb274af143ca2e60a5. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FIJ2X2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe738559d277d2341a39d6872fbbfc3629c5a09184aad7fa775b8faa2242556e2. 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/FIJ2X2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80fa5fef938ebb3cce04c2c9aa37d6324365189b60124f1787f0c1c3f680df0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES92417559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14a324a807b23dcb3c1a08f7cc02989a5494f883fd5d25ccd0283746ecb45e8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFX2527614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3b2a190115d420c09850dff40fc9835dab6122156f9eeb0fd69b810964d79a. 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/QZZ7T2523664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574b4b739be57b55416b2025a229cf702e2976cf8ed5b35595603bb00dabd053. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7T2523665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0c14584c7e902d0d9da1565a08d3168a64f66355fee30ce270fadbb3eba7fb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7T2523666.