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 0xb4ea036a364cee9ad00b5c7353755fe9d519ada0fef633c75b4027047b37f534. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfb7aefa-c444-4740-b7e4-966e2999e2d8.json and https://artists.proofprofile.net/proofs/artist/cfb7aefa-c444-4740-b7e4-966e2999e2d8.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 0x9490b135dae48c583d658ff30c9a46500dce9035d2f3d8a17cca2e3ea9a21695. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:09:01Z), 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/USHM22584532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655cbb77166b36f4a64de28fff3e03927f824cb9782c82093d8d5eae2e2bf171. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:30Z), 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/USHM22584533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347b12eac697847b864525865b4b6a54fab412a3a39b822c9dc1132ca9c8544d. 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/USHM22584534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a812a56f1ecae60c58baa24eadc41a555ba0a8b5a79dff88ff429fc588ba857. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM22584535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2df34c1d16862e14d8d6ee731425c541a53ca55c56858f4d43a6a6867841be. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USHM22584536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ffdd53cb777972714fa0c4886bcb19191b339556ff36f9998186ff98b03ef3. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:34:19Z), 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/USHM22584537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf36962e4cbf20ad026aeae5972862f2f8f046179b2432469ed7ca1e4a733169. 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/USHM22584538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc23e11cd0c0c24d464e062a1d071fd16d9a2967f41a91ee3c2c5f85b6ef5e68. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM22584539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9fa97cc7bccfc13f047dc9c38e5a787e4914d9e8c1afa6e661f6f1283c7d99. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USHM22584540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d794372031ca4030fcd39c59b5e53a04f6644e34dc0339c8329e38f518f1ce. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM22584541.