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 0xbb9618c7f2881d1d74720f0c63ad0a0ebdfa66e49353da76c99392d05108db80. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bed78fd5-e3f0-456b-bee8-6b230e89f9bd.json and https://artists.proofprofile.net/proofs/artist/bed78fd5-e3f0-456b-bee8-6b230e89f9bd.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 0x04d41bbe9962d344adf8f6cb10254fa81373835fe3a314db6ba5e1c85aeadfb2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFYY2040983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d5fb4613692dcb8480716c45af3bb90a513a3a5163ddaf29ea4d7e1d118935. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFYY2041862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa336a5b7750f6938f80f44da5f5b3a25b953a1218c961ee6572b9b8c826187cf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYY2038640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17c8908f4811e19603e872836fdbb19ccfcc41d5dd676facbff4de8d189549. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYY2038642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e93dd8f07b638159c5c8a55728dac79db69f127764f4511458788940d6ae00. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZFYY2038649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe78f3a4a77430a81f2904a319690ce2f9bb28b376c377fc5c9e6b6989da19b. 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/ITY862200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aacbe38171577cb7a7b246060af48d24dbe2fbd26df8af0823432992ea160a4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ITY862200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea39078ec168bc9f05c28aafc9a1cacd8f7db8ddd714bf8e59d4bf6b81f99184. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:06:40Z), 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/ITY862200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4cbd08d801a356813207f7db249db296e9de90931d95c1b3220c64d2a6ca3e. 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/ITY862200041.