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 0x742277f0ddfc8146b41f5e8d7b77381d709cf5c794c8c251ba3f0dae562a0a93. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02d487d3-a1af-4a3c-ade8-aac158f6b617.json and https://artists.proofprofile.net/proofs/artist/02d487d3-a1af-4a3c-ade8-aac158f6b617.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 0xcdc3d0594deb275c77272adb2ec439bff4e02067dad33e0c645310657f1b4979. 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/QM4TW2377691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4034b5d77fde49080b868843ed85fc2b6ad6906105ece36d0d1be937be0b6bcf. 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/QM4TW2376896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128c5841d02380b3667b9be3a00e75dfb1fe7045ff1ce3c4f734fa30f430edd9. 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/QM4TW2377621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd385c0cbfd8d37e6150704a0e9111ad99d705a132b72a0885196a2bef0e83a34. 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/QM4TW2377708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb2f9d6f06fa38cd634ba670e431102fa33b469e6d89b145a888331f9d2730d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6P42437833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919fa3b5bc10d53368a1ae16a8ee506fc3cf4445ff9e9aa8ffaa232e4ee44447. 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/QM6P42437835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b7c52010c74197c9bcd884694c0572cdce59a76bcb68dfdc2f61ca1c10958d. 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/QM6P42437839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c92f6acc0d2354fa33ccce1c380c59873bccaa1b3577756136fdfcb7942d338. 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/QM6N22432327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649f43ceaeaf1080b7bab177695ddbdc41183e1c3deac57cf15a866a3e2487a1. 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/QMFMF2363497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4034b5d77fde49080b868843ed85fc2b6ad6906105ece36d0d1be937be0b6bcf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TW2376896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca7c04e7338c81f77e3ab3c8520622daf3e513a119504f1686084d007a42a91. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES71G2209561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139eb18e6d91baae9a000ddce7988ddb47d4026dab45e54f7fea5f978ff86220. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAHQJ2107082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46135d1f561eee8d8aa09e5e62b8e8933af3c729df647ffc21de2f69c3944305. 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/CAHQJ2107066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d7864e27107c9d85e845985cd1416b6fb870c4f61cd9846cee04d8314945d6. 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/CAGOO2090819.