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 0xace4e6f2fdd924d9ccce5e95f3214d94e9b0659d136eddaec755f915f4c2678c. 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/7ac1c078-5de0-43fd-b641-5728750ff3e5.json and https://artists.proofprofile.net/proofs/artist/7ac1c078-5de0-43fd-b641-5728750ff3e5.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 0x23c5dde575d65abc623581c5ba01aae8bcee9bd7742b056850c7a7bfceba012c. 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/GBLV62040159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691ce8f4dbd5d3b316f57d5caf0e5e429c4715b22a14b848de30c0a5d3af8d68. 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/GBLV62040160.
Tartouffe Vol. 7 (Janeret - Olympus Série, Pt. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a96971c28dfb4435aa637f19c93e343afbdd18819136ebcb9e95e43c00d2f. 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/DEH741653537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28ec6b551d04818e369d934375bce6c47fdb6a5f2fff9e229a4146e2530fce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEH741705148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a580dc8f3642d945818a67fa316a4696a82b7e0def8230f7e25cb75d7c29d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEH741653539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceb7342c58229dfa30799f4f353c88d523d9a7a7d35de1dd53c4d6066e4cc97. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKQU1944155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efcf8f60ae5a48f9f077fadbd9ce48cfea3c067b731fccd3c11659eacf64401. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2100737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e859ea3561570b7e7a489524b0e0cc32f28046e3de27940baa559ef143f97. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/UKACT2130388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b91e799ff00a4181cb3761a5db2d0d04640ff4335297341aeac47f15e8479a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:07Z), 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/UKACT2130390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe28671e07510b46d678b3afc9b4ce2396cfb1305308aacc174cc917cc01446. 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/GBLV62107754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc14de731ef7084a79808133fa4b1d7e9aaf526a3fabdaed740478d115e10b. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:10:44Z), 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/GBLV62107758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a04b0e65f1ed6470deccbf46d7ec5dd543c369e5d5c0c2646c49f30ad5e5d8. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/GBLV62107761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450a68f9242346d2a61fdf2074cedd1f32ef99a1f6f4cb45cd0512771e7c9fc9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:01Z), 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/GBKQU2267082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bf4086e21bcf5690c3c23ea4f925aacec337db1be4604dfa9200cc833abd16. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKN6K2300909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938d53f044aff48e551d4917b02d720920385885e0a6b382e0ffff2dce467d09. 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/GBKQU2503133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab86372b5d0fe7473ca498c9682ec93a4adef681b90e4aeacccbdf9d27e62c8. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:42:03Z), 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/GBKQU2509061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473690861c440869ad09b6319a2ef4dab81f16ecc60f7aec66ef5939a1d9d11d. 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/GBKQU2509062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee02dc1de58895099394c2f83d8dc7e8c0d73a05d3cc1fac07a9efe90b3e664f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBKQU2509063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52066ee90b5717e3d700444a379f497d8a4dc20a016675020d7352de653f971. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR2X41917136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7231ee53a324ca6d772515498663cfbf193b885fec9c33ee3984ff8251eda509. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU1950173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824cba4496643005b903f15244ef03867039334caef54a4590747b45c730701a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2346943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a41f62a3f00988281123afbd373ce21536c2f916722bbf05a70dc54c55505ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W11607312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fd5c6f5b237895a4b86779cf32ca072aed5f44dac4b6a4aa8888f4c2e7a496. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/GBKQU2356091.
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 0x0f79bd66f9b4eab7bde546061057c4747f9ca5691e2bf23a4bcc24ab321b09b0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEH742230819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2f9c3691862c1812cabf85acfe6ad326c16256ee3ea5ec2dcfe07bd370641c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBEXH2500046.