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 0x3e6fbf6036789e48e85ba4d50addf90c6d05bc48bd02150a3dd6e50cc0c2c593. 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/abc3ff82-5a86-467c-b06e-2ee07ab659b9.json and https://artists.proofprofile.net/proofs/artist/abc3ff82-5a86-467c-b06e-2ee07ab659b9.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 0x9f6be3381a72c415d73b135a8147eae682783434fa60d01c5c79b4e503dc7a44. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:41:05Z), 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/CH6542058870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf59d428448c80c591b5b9c77882d97340d464975beea104f2d5014ce7b09d5b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:43:59Z), 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/CH6542058869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebc6d0082f15f5394afa8cfdd9021a386f8b8cd407cf23941ed2cf8c912fd2b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH6542058867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc672ac51d3a5541dc76d55fa2da1841305e86ad87e0bc2594a5a98875c422b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH6542058880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36dc632c95e27bf899dfa992b0b4650551bf9444bc8ff2f1b6fd8ab4c71bf0a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542058879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb37aa9a8fca77236032e63348ff5ed54640527aeccdb81f3266709c0a4e059. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CH6542058878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2d7e5662535aebc3fd8a3fb6d06a95265b7e5ffd42e1ffdc82d92eaee8c0f5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH6542058876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cd7dc0cc172cf870928b6df03c893cd19168bfee31a02c55f4f51aad6a7ff0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CH6542058885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3367af42e93d9e2c19d411d0c0fec472aec2905cf8e944c3abf3d0bc5d88aed. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:03:26Z), 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/CH6542058884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29263d8db97f4eda3585e6cbce8468f1017783e22ed0fd6e5159663bf3a01c80. 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/CH6542058883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d364e9cc3ff42b248f40cace062b23c5524030d376c199f4f183f31b1613de9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CH6542058882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d318d5449a0e6cdde2f4690b910e5a35f18cda694144a1836a14d8368316b9. 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/CH6542058881.