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 0x81963b71767495c16f73b7b026cf0ca4611e56ea154848714ec4a22a748ce954. 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/8e7ed341-a764-4d1b-8fd5-d8a2af245836.json and https://artists.proofprofile.net/proofs/artist/8e7ed341-a764-4d1b-8fd5-d8a2af245836.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 0x916fdc34827a41bdfd2035ad29803a211607a8cd1b65b0afc3877c1554269e27. 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/USCGH0723968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2577507002c7aee01ea980d2b0a19ac7d3f604f29f313093bd56039f3198dbad. 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/USCGH0723970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6c881d5bd92bfda7c61a8e64953a4e77f2414d9c65683cd9e752370a7c02ea. 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/USCGH0723973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9330fae353c8fa51b9523f788928660cfe554e88253d2af6bfbf9b279846e912. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGH0723983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7084e04f7484a895e3da3b0ba85714ba74c5efd9ab550911096eff0512c29e. 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/DEQ120706802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec543919202ade9295eae9b09f37fe512801406c3d3708210aadb4bf1b69d1f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEQ121112553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4bcd7155b6940c4a57abf80727f2cc747cef2e1a3bf57d08e5ff3c284859f8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:13Z), 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/DEQ121112555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f274c04f1dd090c634908d1c7382ab8aed5af92a95cfbcb5fc1aeb90b39ddd1. 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/DEQ121112557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc854018423be833d0b7d4bd3864c8256645ec45070ee2414e3b971bc1c7d0a3d. 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/DEQ121112558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72336dc409d9e5c283ead21bc588b3e54b4bf3a9236ae9418145c2b2316923fe. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEQ121535287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548647a9d40ec7ea3469307c262a3d3ad5d57d201887939f07533c990087befa. 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/DEQ121535290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c05e4b6bedfb9a1302b626279af367a84377773b39c238caa6fd02e3d775017. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:53:00Z), 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/DEQ121535303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa4242b252a521dd0761836a6ccfc9310348e3dc134389dcc65b1840e1a2fd2. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/DEQ121535304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0c1d771971bba6d8c2139d52da4ef55f753bbec531fd874046f29c5cbb02d9. 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/DEQ022101772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ec50e6e3122cc902501b9e542f72f870df26b0b96fe987e45eff98351830fc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEQ022101774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42164c1e04b2a7ca85f3b33947e59ceb49103be85acc396d771f1016feceef1. 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/DEQ022101775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3809126acc871ce260752ec67aa20eba7c6c845fcfa5c141ed00081e38347ec6. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEQ022101777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fb3d7218d2d60d6e1dd4b4178a948d471401f000d5aff425369c5f9d1e6277. 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/DEQ022101780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b43b05eba432b4bc6d21128ef00df65b604b9448d7c25907ff2131307f4a5c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEQ022101782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceecaa613e46c27ed6652f8e7da847aed70c2df898ab75a26a73e469687b7b9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:19Z), 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/DEQ022101785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255420fd5a6dd2926868cca3ef1bd98a57fed0ef9334f864d650340b684081ee. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:35Z), 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/QZK6Q2267007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d525963dab50340fd3f41196960d5a229ccea52cd18c203e0f611519819e2e7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTB32236659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c5d167290a77ba0980a643c7eb554edc08569259fb8ac35b01eba19b656558. 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/QZHN82494431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece535fa1d9cc075d690f191116dcf6d6761506f5563ca45609e5d817bf50f6f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:57Z), 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/QZWFK2481010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711dfe694fd4f8df9ae62838ad22e6748b3e2141c7cb1aa0f2598a645e2e3d44. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/QT3EY2499730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4bb4fefbeaa5be0055e394527addc465f80e64ada67ea216fe42c75d89934f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES8741824107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb75333e0b3c354f8b2ee69d00acadec1aaae6bdd278be16b483725f68c6c2d. 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/DEQ020704752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f83d2f5f76defbdb6af0c52de38d82ff51908dc5b47a117e6cce819007bee49. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEQ121642094.
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 0x01f98df99f428cb35208dda61510f53c92161b15b511164b912d38f00f2baa8b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEQ121216943.