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 0xa52e02fbe39611dfcaa058877a498ebf6f1a7450f0403325bda734827b8bb88b. 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/3543864e-b801-47b9-b1f8-bc31877d5f7b.json and https://artists.proofprofile.net/proofs/artist/3543864e-b801-47b9-b1f8-bc31877d5f7b.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 0xe748a9080d25a68214bdea70efc2a35beab955ee671f60d1cb203b52a7cfbf97. 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/ITUA12200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c69f91442920bd563daa5498f1a85f24f0146d45d030ed0cfede2dbb9214e0d. 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/QZTB62376752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c69f91442920bd563daa5498f1a85f24f0146d45d030ed0cfede2dbb9214e0d. 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/QZTB62376752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149b2362ebd80482ef66869b1d248f68ea10158c18a26d2aff1a5d918ec0a2ec. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/ITDI32300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942c3f34048a7931cb9845ba658abb74b218932dcbf10c1bcddc295ccaa70cd1. 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/ITRWL2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537ea423539b6f44c3ba7bbb0da8ca0e82695c4af0af736163b8f40dfd4efd52. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITUA12200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5c86ccdb5e47875e1b0f3569c17a14c2bab0f44a6c3873f8ff49c6674923b6. 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/ITUA12200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89460668ac2760fa265939fb8d6ad362592ddafa9f8888fa933f6a2fd1228590. 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/ITUA12200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748a9080d25a68214bdea70efc2a35beab955ee671f60d1cb203b52a7cfbf97. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUA12200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ace1c189ed0a7070d3124b07fa9985235bd0afc7350053bf6efc469a79a2bf. 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/ITUA12200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140e472a01c038ab3577d07c588ce509416f82d9455c85d797ad0c2399f19de0. 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/ITUA12200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99ffdf722184b5d1c7c62de8e420b2e42f20bcf9b74ed293e0041b17eb62a83. 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/ITUA12200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e039efc87f80d8dbbc03f9fa60d86f658061f2021f4ec565937f13af01c8f. 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/ITUA12200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc628e630654387f5335bf59f3c54b2039a7f3e08ee9ff31e9594cf12264388a7. 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/ITB002401335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc46c39d9d19f5abd71db8a08e03637fad78e026e86f5e5a0ea32d99f9612af. 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/US38Y2305109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a22a3761da9767165b9f0e5799318a411ec5e9dacd9e590305b6e41701fd2a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ITUA12200005.
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 0xd8341a27a35c0b60f203d5a2784c6e6633a3b044817b95e972e248531654c545. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ITRWL2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1230d63c5d1ae858b370c0a981622b6622e9a35e55ed011f76e5dd08a39c8f3b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAFR2156358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d274d7c6f8448a03493fad84b000a19c4fae6177c842d0e5525b7af4fcd2b42. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/US38Y2309113.