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 0x773b1fa989bb982b0c699c7d7641c41bc5a706c815b55ea8e841c72e7bbbe510. 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/0caf3ab2-1722-4c50-9baf-d2990820538d.json and https://artists.proofprofile.net/proofs/artist/0caf3ab2-1722-4c50-9baf-d2990820538d.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 0xb1b141d97749eb9569f75a2c2e5746d552d38b0968429defd934d74a1b9ce878. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBBA1600601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4928654e2b9a04020648eaabbd5a163986aa3e578c14624a6bc80ada7db989d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBBA1600606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff20d2653cc907e0273fe221c167a13814708171cdf5c7703c4f0ba163e2abb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBBA1600607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b141d97749eb9569f75a2c2e5746d552d38b0968429defd934d74a1b9ce878. 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/SEBBA1600601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd387cc4cf40bb6db1731b8fda45b4e5a96198007b14e01647915785954e9fc. 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/SEBBA1600602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f4016e9c29ad370e483a393ee330b86e4c51a3b9f910ff31efa816ad123a3f. 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/SEBBA1600603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2307af92dce35f15c4f342a8b03eba7ede46ff9e0786549dda5d125293e1b0. 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/SEBBA1600604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad2830d65d2f74f06e414ff02bf74262796d6973bc2f628c10b9a33eeea9754. 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/SEBBA1600605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4928654e2b9a04020648eaabbd5a163986aa3e578c14624a6bc80ada7db989d. 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/SEBBA1600606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9f7c08d9dad29566e363656503abf596e7527a9cc7c08363cf75644682869b. 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/SEBBA1600608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a26e06fd587a9e28a0d8d204c6df643d84d615d70c1db4d934f3173e9424e81. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QMBZ92052014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0485bae97e649025dff46bd6d3cc4fc4971cb910957659693130c41ea7de0135. 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/SEBAA2401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa6dfe0f75d05eb3ecbd3f7673cfd3d4fa089cbc6ac7b7978cecb6ee59eaccf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SEBAA2401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637f1db2c8e8f8ae7baf8b56167ccc35af5774fb23f9771390ecf995883fc414. 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/USB8U2401544.