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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b488f9868adc2e1313ca9dfbcf5a95b9d5bb065856d2799435d73fa3785cff8. 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/6ba99d15-d6c3-4b26-9148-c876e8536055.json and https://artists.proofprofile.net/proofs/artist/6ba99d15-d6c3-4b26-9148-c876e8536055.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748ba3021d4633562070bfbd5ff78532cbfee765a0c2cc4e91be40cc727637ea. 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/QZQAY2400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7236d99c521fec923cff8c38b4125fdabfac4a76f3a811e35cee0830101cba54. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZSYP2499659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac23cec08a93db37dd1229f1e68537cb5577fdd957e00ff9c69a95e81c8e378. 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/QZTL92429047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaabda766cd2598372699bdb958485cd429fa1bd87395dd7d36331b2cbec198e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTLA2443020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36582908eee651e562e1854e3597a24b41474af70bc4604749ee76cd78226da9. 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/QZQAY2463636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d03509593844a714431de44a2fb870d477af0ac26c9084003fcd11a5d254dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2486163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30613aee3a3cb8e0c88b1c4552f20c73da579990c2ea8645278e75ac604b1fa. 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/QZQAY2404270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd46054d2c77fda062e86744950001470d35dab48e7ea37e4dccf1648a0d8c13. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2464521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c2d678fb3f7400004e567a5f9f634e2a9aa4bfdad0d3e93e2db354953bb6f8. 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/QZQAY2411430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de532f105c9375ed788505ea5ba676dfdda22e939e84651b95aa736f7318ae. 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/QZQAY2408309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b59f0850376b8cbeec97e663d1ee257f91e5e5469ad3bd241d13c359444851. 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/QZQAY2459669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36582908eee651e562e1854e3597a24b41474af70bc4604749ee76cd78226da9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2463636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da2f59e1d35c68633ef4295b399a76c1611f65452184b4adef3017d175f467. 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/QZVEM2321227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f59828f3769f222f06563963ea2cd6ed81be45553144805b9617c104bbac4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZVEM2321228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88202b710066095807c9c88c3bd64dd3e3390a0af82ead5a8dd8888909ba1adf. 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/QZVEM2322136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c14dff9dbb7b6982ada9c58d3f2e941da63f038282a93de443a51a230bf7fc. 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/QZVEM2322137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46b8dd75a4e64ea2ea2eb51ced1478793efbf3700ac7fdaa39c0467fcb03d8a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZVEM2322138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06adfa11cefc206425a9d5b6f37884f9e1915b1282c132d421a2a5e52a2e15e4. 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/QZVEM2321229.