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 0xb69300be636d93e2068b53596f9ec538a80d140199542706950c3ddfd26c0924. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7637b141-c980-4814-87a1-63bf9c39ce4c.json and https://artists.proofprofile.net/proofs/artist/7637b141-c980-4814-87a1-63bf9c39ce4c.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 0x08af65b38933961a425f9ea7f3ea66bebd5bc5deefa5e077de7ae2d9f3bfdad3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRP621679720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c81e9be06f29417bf75dec796471f2b1fdf934e16917e05047ef39a4d197d0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRP621468170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb8cddc02d1dcc1e062f6059cb2664731f6dd3859bd08078c535b116b9c530a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:24:32Z), 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/FRP621468250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a726bfee96b3961c362f34d53403d9dac80f26e3959914e515b6a4bcf5576e1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:13Z), 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/FRP621677250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fbe58ab6ac034079ca6dcb3dae3d8edc07f86a19cc0d2eeb6179c14a177636. 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/FRP621677260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1376dd66ff249f14d670cac1e01661b0abfed2d13dd3c751d4a399637daac25c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:42:13Z), 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/FRP621677270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8c0bec310b79749411bf84aef21bdfbc61e9707cf2e0069966d2e67822df3d. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/FRP621677280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623626b883af60a7a37fc5eec12cc892962a1b7377c7a6b815ac63eb0f1951da. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRP621677330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9004b8f48b567e5eba4f62652a3ea9964952235be3e1e8ffe1eaea56d6cfa6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FRP621677350.