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 0x42f0ce2027d17dc12c4673c65145f4347f0c381e7c14ffd44f66d1efbdf2a3c8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ddc5104-4b06-4d8e-83ff-82fcb3b85a34.json and https://artists.proofprofile.net/proofs/artist/7ddc5104-4b06-4d8e-83ff-82fcb3b85a34.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 0x4214e2b9aaee973c27664c3cd5c560a72f375eaaf2c61c02e26b613a1fc21b9b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1042002005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d68d081c9897fa785308fa105b29f40f51fe7839db70a618622b00725693b1. 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/IL4070900562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b953f300898fc6c6f3a6d2e86186dcc0ac08261d1cfab78578fc82e92df809. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL4070900550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82a2040ca970157c89357a513350b55fd216b668fe8cb61ffe7711df9df9fe2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL4070900566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7798e611d208d3be245e6896bda2f7e3dbca623ed9c43f3534e90b081a6653f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1021910930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9af42d6074e47f5fcae2d03ac25c9f7e6a08557c55405863e4539556d0a9bd4. 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/IL1021911204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4214e2b9aaee973c27664c3cd5c560a72f375eaaf2c61c02e26b613a1fc21b9b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/IL1042002005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41d2f134afbca45701fa8d5c080c9418c98b5eeee6bb70bd319ceda959fec87. 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/IL1022112477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f1ccba03fae255fb5b871458bacb06a6652234b07b5f3f6e0c8abacda46df7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IL3252204001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c3b6d00a13138832cd5afa1f8107826ba55105ff0ea17a57a2f58bec93b95b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL7532213161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324b267946dcf1ee565f2aac94af2dedf0dd6bde8a432ca6c76665282bf016d7. 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/IL7532313139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c59a120120fc6654418040946192d5fcbf836ecaa7ca09efc6dfc8edcb4f5. 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/IL7532413472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc992eb0fafcccced3ff54422777c3c8a0791098d024f50262e7a1f3ddd28dc0f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL7532413474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204e36e7837a2186fb0d993ecc6a256bbad60219823575e6ba2371ff84c2b928. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IL7532413388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4857ab935a61dc3c609d36f4a51da341e7cf6636a57e881cec03455fd2e38e. 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/IL7532313775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324b267946dcf1ee565f2aac94af2dedf0dd6bde8a432ca6c76665282bf016d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL7532313139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c3b6d00a13138832cd5afa1f8107826ba55105ff0ea17a57a2f58bec93b95b. 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/IL7532213161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9af42d6074e47f5fcae2d03ac25c9f7e6a08557c55405863e4539556d0a9bd4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1021911204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7798e611d208d3be245e6896bda2f7e3dbca623ed9c43f3534e90b081a6653f6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IL1021910930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40193d2fff8079d6a482fd5214656bddcd3f762e228922de5cc8fee49c4212f8. 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/IL7532413631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63624bb2990b8d8e7f381b4bf88a66d786541c27789399b662148234906b59ae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL7532513305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e834691b891f8c417e658a180f832928c034de764904daa3dc84bc5d8a917d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IL7532421690.