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 0x55ff62b115e1a4df4f0cfa5ae5a64658a635fa28642fa982561e0e9700ce5440. 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/a51611eb-0826-47cc-a4fb-cccf54349dfe.json and https://artists.proofprofile.net/proofs/artist/a51611eb-0826-47cc-a4fb-cccf54349dfe.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 0x3b73f2e088c1c430682b307df3195fa30b7ced5b1a0feac960f45749a49d0bf0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USCGJ2060636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee0a6565bd1a36081bc2f893384f3171c6e7441bcfe62185c1fa495f58ea43. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGJ2060637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ce9da0b225e86f9dda82fdf4ba5307da2b442e707bbf880b1fdd3eb0fed671. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:53Z), 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/USCGJ2060638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7b40a331a7f4755495876c46c1005c450264c9df6658bd5d75737fd9526f40. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:05:27Z), 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/USCGJ2060642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e018f6b42d81fc7a9b0afd44903f9d12bc25805e0445730bee9396481adcf29. 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/USCGJ2060644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b704f6737bd3ce390264b5dd68b2322bc598db95a11f0543a6a86c43229085. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4R2033398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b18e95936c822202fcbc8670f77cd6d3fa2070756c9bafce966fd0c882c7945. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USL4R2033399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0cbc58b19d75f750eda5e13cab5d517f9ec5b4daacdbf28054108b30842ab6. 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/USL4R2033401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8185a50d343e791a40b342add545dd6f07e99ffb78a3ea98747c1d4b0ef5f2f2. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USL4R2033403.