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 0xcb230b1163a57eb9a92f1fe989cf0090869d798fd1fe91fefebd326bd20d97b6. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50081af2-add4-4e29-af8b-d248420f5c65.json and https://artists.proofprofile.net/proofs/artist/50081af2-add4-4e29-af8b-d248420f5c65.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 0xf061761a7bc766427a04038911b775280c80445a881813dda91fd40f71e47abc. 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/QZNWQ2393975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e2dd1244a9daf05b3b7b1c5aac7a1820136fde6f2088477b1795948ffd1d54. 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/QZFZ32462715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f434c80f6dcb2c849816abca11ba32af9c7e9e26f31bb69dcf29ab36cdb4c4. 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/QZFZ32462716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc56c781b7305d93099d868db3830e63edca25a275c1bc1ea19d74d7bb7fe090. 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/QZFZ32462719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581e0bdf2c4ea1abb2574bef47e27aa87965b11e1149a45fabd27f3ced95aa04. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZFZ32462717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8040d222098b978fb5f56d6175db7da2e4f563feaccde735bb697e8c7ea856. 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/QZNWU2411135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45e094f1dbff8365d9cead879a27090ba6387eeb8d9528e705542f57f043210. 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/QZNWU2411136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932731360d949c686b4671aa4263951f7774345ca2f2d0972366e7844886e2a. 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/QZNWU2411137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1916c34f2eb93f9dd820abc9d12f5713d08d8375675dc50c86a305bdc4215f0. 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/QZNWU2411138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e3cd1716002e1f746922078ea802882ff48e5ee1426909f6d3ee58e761f8b3. 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/QZNWU2411139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89db335b8b51495db121aead986f8dbe9b5430fe0be5b64da11b41989e1f457. 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/QZNWU2411140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9186f4a05e1e3e1599f5fb30b4f00a1ee60e5ada6847f824234b7c1181401c5f. 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/QZNWU2411141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466076ed35d5dd2f246f92bbec41aafdf33a640d750435a17ed547bd23a9562c. 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/QZNWU2411142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11819f64d22ad678dd1ca057d3a422546bc16af213c3803d29afaea014bfae2d. 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/QZNWU2411143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea12b556935e689886062111f4fc9a3f954767c69b4a6700ab3927712e32dd54. 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/IL7192500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c854a2669bfeae5eebe8a9bdc0e05abe755335b97b793637c94a4305b88796c. 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/IL7192500291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e6eba763db71282a2a1e8c19f6acbca6f7471848601a8210ce730e0f113ee. 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/IL7192500292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdcc508906f9136fa0102da3e10f017df3ea40ad7a1c61bc17a9615d50efd14. 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/IL7192500293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8676e7c2334ca83143d385db8d785b8b10ba106eb4a81f01809b201978db63. 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/IL7192500294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5271885e012ea1196d4893adc0cb59102ea5778e74db95d659b5ac1073bb18eb. 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/IL7192500295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697c829b54c05f4138c9541d8a1b40551c43fc73812ec17cd4908a9eeca65916. 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/IL7192500296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b6d1443c94452528daaf52263d89b524c4db3aa08904f0e15b01c95f879817. 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/IL7192500297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c90546ba398234563191f4310a9989c121de4d7b5c61d4cdd28f26504a12d1. 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/IL7192500298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c259b549fc9436aa70194b5e4c0fa02011bab8fbaa416964e049e2e38e7780b. 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/IL7192500299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0c491fb9cfc4ed75b165860878d545da3484106a173af2cf065297d18d651b. 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/IL7192500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc64aed530eb90206f84e91e59f921d76f01f1db5f4a608209d51ba9ef8d4b86. 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/IL7192500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9965c0b54caf3f14e556fb84e1b078a08c4cd7ac7ddb022832679e19d132738. 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/QZFZ42539313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725d0c301ff94e41c264c16a5b7a58c3b59fd6795bde01b1dffac4e9cf12dbe2. 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/QZFZ42539314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c5b675e18ea438c6766cba2c5b761d9fe137b4d745ffea7bc75d27f0b01afb. 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/QZFZ42539315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6868acb30b3d962beac22d4ff45796da868d20dcc006a83aacc00352bd3cee. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZFZ42539312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40a1daab2d2f484d84250ad0191db9b12e7c5cc69f865fe7bfa91e0c0961d4e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZFYZ2521508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0522c2f5a3c66bd243a6cfe7f4c0e348119c90ef4f9293bf03afe7dc2c476b9. 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/QZRP42586778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf9f24ffab866b4234e65eff425f727bbfbd09d9782e9a252b0f768555716bf. 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/QZRP42586779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9c785abbde9c182fb68f438bc8ca52ecfce1ff420b1cb41352380d73e51598. 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/QZRP42586780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902aa269748df24b874bd802d38bfba09bb8bcd6005aed8b82002e5f52bb86f4. 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/QZRP42586781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cae76cf81937c93aae33cfe371b6ee63f10ceac3dc29f6725f6e106cdaa0df. 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/QZRP42586782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0005ca62b82f8583f46875ca75657be1b9f6efc4c2d776a8cef5b91e1a828b34. 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/QZRP42586783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7254d71d3007b4fba8c9b4e524b9a91ff7ca8a0e8ec02997f7df2cc085e9ce24. 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/QZRP42586784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba005aba027ac66df0a62e699e818f52abbcf489caa9cd0423e67ced180b9d55. 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/QZRP42586785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2999173ac466da06964719fab507139d300196100c7b931ddc9ba0f9b2fd8df. 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/QZRP42586786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0663a5afaba207aebfbb165be9857977e96362074a68889c85d6c124f25b6a71. 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/QZTBA2409215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14262c427382e7c4631ff276f336bc317ae575e9070c35e8b8ce6dcd62f58237. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB52489459.