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 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 0xaa01aeaefd0e74dc8cbdd7ed288ebe9dd2438bc426a1620288cc8b93cd2fb1b5. 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/68ba1bb0-b587-4d22-b746-244247a5cd40.json and https://artists.proofprofile.net/proofs/artist/68ba1bb0-b587-4d22-b746-244247a5cd40.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 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 0x0ab4d7bc308f6dfe321469da5a1800361f58df70a040054acd875916a4e28e73. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USHM21165682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa362c1bfdae3076836ba0ea1362207f1030bfcef6a40ff6c87bfab4d0c4fb651. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USCGJ1228018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19ad35134da96adb656d5f1078a8b266b4dc8304eca75901183006ed05f41b. 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/USCGJ1228020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6990ce0e7029fb4ffc72c9f472755adb80e9d0e9cb4d3c8171941a1dd33a4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGJ1476963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619d75b7c3b1a2c4a977f4d3f4636998ee6b854c9bf80da39ca576792f58ffae. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USCGJ1476968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd142bb8e126e0d55c544f63b9850b49fec01f35da0a56682e2763f8536207395. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USHM81583122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ec4ce7eb19c3365f495c7f4d83c9b150b37d4891c6b066fb43d448b3377b56. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USCGJ1650747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ccee71c42299ac30a8f585ccd52464d62fa41fe7f8c9c9ba3a6f399a0fdac5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM81692356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbf077f644d505c4799c280e2aad3b45033e8ebbf6262f9fbb35dbc1f565259. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USCGJ1868215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948fa02589bc679d67eb60060c784ad9d95dc1867b84d1ccba366aad0e25f0e0. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USDY42526764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0354b06429d6f6f3a8f1be7562fc6c8bd2b0f226785d5a9575951669ce313b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USDY42526766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ddea46f6882b74c18fcdef1514c665cbd34c16daaada47b2ae6efec75ba8c9. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/JPJ901415800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805c7f009fe291c58419310d8bf445bcbce2336e8892144bf42617f00c0b8d2a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ3CX1600726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac36213bdd3ae9c7e32ef50f347c12d7d42d4c71be925ccbb9e2a1751c01850. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCABW1455824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d1f700b97c0af63ff4fde46369b90db208e8f003d7492143d53943f5e37450. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/KRA491500790.