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 0x9ef867767e734254096b645cfd5330ccb555c09fa726a60b8d1dc607c247a92b. 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/c0ff7ba3-d7e5-4f4c-b60a-31c811eae444.json and https://artists.proofprofile.net/proofs/artist/c0ff7ba3-d7e5-4f4c-b60a-31c811eae444.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 0xcab3a3f6b5aaf029356da91cd4ebf60f26fb7474812e500fa3d00d66ba067d5d. 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/BCWK42400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a0fe531fba3bd139415ca5cbe7ca93ceffbb0a0b3765a2f5db6a8be6407ada. 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/ESA112439684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f010fa997711e2771f36a097fceb6254ffc9384f36bbe980a519ebc6a30cfe. 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/ESA112324926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1056232faed1fb96e99fcb285b2ac5d386dc1373175b80b61546030ad3e5321e. 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/BCNWM2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ad53aeea354b26821e3736880cef53875bdfa1b0209e8c15166a1e1892edc5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:58:00Z), 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/BXTRN2300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17a3b591e3d69e41cafc06f624e1450f341239df6a9f074fab69eca0d5020ac. 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/BXTRN2300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af3525757f4d5af7b75380037715520aadeccfe3d14d1327b7edab961cb48c. 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/BXTRN2400668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a1f9655b0c8962fda5a5fde7bc8476f2bc2d673bc33dd88773edceb7275858. 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/QZNJX2473073.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a23ed122e1673a03dba5e9f66a290208d7ca3e5268a32e6bc43b35445c6234e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9K2395446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84b3f1a3f3679d721735063001ee48a416e54176a278d55096a8bb238ce7e33. 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/BCIH82207328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45528415e04e26470cbb6d8bb7f0b86845d2d0ed7aa02353cfd0947c5c46d3ac. 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/BXTRN2500774.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a52ad73d0320fd50ee1f24e7f3ff40529676010e08dd21c0ee74aaeb22f3a16. 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/BXTRN2500810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6da2a3a8d630a7316334e0de3d5aa13924c14fdfa39f2e7a6b6bc3431e6f8f. 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/BXTRN2500773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e127496888e7b1b63c80ad39e9e3e5b5c473cd645811305b212c290a72ff0c9. 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/BXTRN2500747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb2b5c7be39d6c2b6028372df7085c91a7049dcb7d98f5bba844c7c525d8bf6. 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/BXTRN2500723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ed98df2679c5a176394402f2d8052e50466d2c496e6f08215165622a1b956f. 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/BXTRN2500612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3124e8c3d093284d91e5e65964aac672c211936c1cb0e1512bf50e5b271aa44b. 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/BXTRN2400655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266c1fcd39495c2b906dfdadec32d5d8e8e5cb792ec465894d8489f32ca0926a. 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/BX4IU2502984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f03d43da07782d9a4d8eb97a5fad41cf1d3ccdc645e3e7f1108763384c8ee0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCNWM2100074.