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 0x89b39e7d54252871208b8e22c518dea8f9805f35ac2c5cfc6fa92e74a6c44146. 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/a2ea21c4-b764-46d6-a51a-df78e9670f94.json and https://artists.proofprofile.net/proofs/artist/a2ea21c4-b764-46d6-a51a-df78e9670f94.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 0x891013bc0987bd9472636eeb19ebe2a6d823c78e84f8db99ffe428eeae8d091e. 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/DKF6X2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbaf1021324f2a17401f9dafb6bb1d7c3102c989c414cd1f0588e56585c10a4. 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/DKD4H2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b016469ee5456046852baedb24f0e9a4231d60e6ffe5a0eaa4c7091d32b6e0. 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/DKF6X2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92808333b2e204d200c27941bd3f5a645eb3083ce0628c53568b0b6d07379a73. 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/DKD4H2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc14353adc514c38860bc042487945c4a8ce19beb0fb5899a1cf7fef17afc51e. 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/DKD4H2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e6fbaa750d9cfe2893e7bc14e0c4a647ad621c38ab7923ff451ad32594e860. 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/DKER61000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6717c678489f72c1854e615ac88754f6a71a513509781b732ebeb2957f531b91. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKD4H2100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92808333b2e204d200c27941bd3f5a645eb3083ce0628c53568b0b6d07379a73. 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/DKD4H2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc14353adc514c38860bc042487945c4a8ce19beb0fb5899a1cf7fef17afc51e. 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/DKD4H2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e6fbaa750d9cfe2893e7bc14e0c4a647ad621c38ab7923ff451ad32594e860. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKER61000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbaf1021324f2a17401f9dafb6bb1d7c3102c989c414cd1f0588e56585c10a4. 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/DKD4H2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc14353adc514c38860bc042487945c4a8ce19beb0fb5899a1cf7fef17afc51e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKD4H2100101.