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 0xa782a07992fe9cbfd32bc93fe9567cac64da5ab28cafc8c93866db6fe8de1c1d. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f31326e7-0bc1-4615-8a86-cca9e7200253.json and https://artists.proofprofile.net/proofs/artist/f31326e7-0bc1-4615-8a86-cca9e7200253.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 0xf75deba3df6feeb738b7318de79d897ee573cf2d663e8a61f5bd57d92b52ead7. 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/CALQN2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97530a17c5b16a32cf6ef533bcdb7b5685d393ab12092bcaec46d23397e2895f. 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/CALQN2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5de6cc045fbaa600024bb6d689c53959c72f81a066309887c172f1f62790e0a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:34:33Z), 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/CALQN2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b09943f6ec9661514d772bd7ae6103d2fbd8ddf7166ecac187b4579be2fa94. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CALQN2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b1dca19ac77fef6ae31f68f32a88cde0c5d2d68a9f37e440b403dbb21c058. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CALQN2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0ef93dbab739ffbfa8f9bae196e2e115449d78c57d9baa949f3f9f0c5594d1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CALQN2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7267df8fd0ad2267168fe0b66abffb425cc9f66d824f575d93726da00ff3cb55. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CALQN2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b046824d116b5f93e0102e1a9080b18c86906a9cb9c23e7544dc8d0c59876. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CALQN2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeece7dfc297d9a9ed882ce2c8d90a412de5603026ed62f1eeaa884f5d9ac0d40. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:21:11Z), 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/CALQN2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ea6e04f3dd7a41e5e43f0b5f90371f7776b86a0927634de6d2567e186490e2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CALQN2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5d8750aa0794cccdd4d99fe0dd76a9b638fc3de6a3901e3f38bd08ca189304. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CALQN2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016e00a2cc72fc01878e19517618cb1cab6df4b2ad0204e4281f1c12f6acf78c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CALQN2000022.