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 0x096085fffbc700f137c2ca338fc56cbccec59a88440051a0c7878999270f0958. 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/ba6dece9-649c-4b2e-90e9-971ae010c3f9.json and https://artists.proofprofile.net/proofs/artist/ba6dece9-649c-4b2e-90e9-971ae010c3f9.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 0x377dc1fdbabd49a4cacd1b26773c610ba24f4b321ca3e3e5361c33caccfc9b5a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCADQ1892748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2015bead82df32b20109fe8efbc914c8740eccba8b243f5e5a67ab9bd1e9ff5a. 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/TCADQ1892758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397093b8f0ac7c847c7eef4f77611e2943a333f599bcc9773dbd042942fda5d0. 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/TCADQ1892761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987d924a7570390caa93fe70dd6fec0b7d90401e40e74be1a1aa00bca7b40771. 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/TCADQ1892764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa525e4792dad867fb176f9c3b99012cae024846796b0b573e486bd96bc208d. 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/TCADQ1892770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a970a6a4eeb9fbefd50f0cdc1b9d991e22b1aa25dae48fe8f0224a4f54f0fbb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCADQ1892779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca9c50a6a2e7bb560bf81b30ab834a1ff700e251f50b6eea3acf80299c9f3e3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCADQ1892785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ea15dac9d8950e1c165ae13aed51de254e66e55066d9897f639ac2b759d327. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/TCADY1873187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc62b6d52482e9ace3401907b96d885b73ada7f7c78690e9466230b1718fc1a0. 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/TCADY1873191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc4e2fa990d515b78ee5a4050440dab92c5a1500864e3b867a47861c2026763. 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/TCADY1873192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c82bab6a94e2ff0fd11a9f49f16e85cd2a4ba005a23fd0314639b79bcae201. 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/TCADY1873198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455c7d599025c4252b65556a117c066bc9d7bab2fbeb4ef1c074a82b9f81b75a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCADY1873202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a573342c4a3e41af7e0c2b744accf9a37e24fccdf8aa51f7fe2a67b69f30c47. 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/TCADY1873207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd765cfacb5381ff32ae3320e02b1bb0be31fb390bb10cd4822d516de5d54585f. 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/TCADY1873211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98730758b7ac3b97b7eeaca309f0d2df03316b7fea190879806a1fc3f9fc479. 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/TCADY1873225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b91a51bd3454c88f6c6f1558f5efe7a8c5e28c92db2db2fe6178cec5b8b8301. 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/TCADY1873239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aa880d9eeb75d5668fe3a26eb7e3aaed816c7d429f91e6f2e19726af964506. 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/TCADY1873247.