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 0xa27d9edc67eee86dff14763fe3c996ece54add08162094de936a057a95c8c531. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c72c8ad-dfee-4ffd-b3ca-47f434df859d.json and https://artists.proofprofile.net/proofs/artist/6c72c8ad-dfee-4ffd-b3ca-47f434df859d.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 0xb9ea224b257a5ec58e555bec600ee80316f72a7341bd14c5662faecaaf8dcc81. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHZ62037519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb572a6f215837243f35b8631204915f9cf0544f9abbb75a1e6152aef6a96fda9. 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/QZHZ62037510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c4046c3c93ded7203665334fdf7e73782750068f416ea63b70bc22854412b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:00:51Z), 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/QZHZ62037512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84cebfaa3412ab9012c7ee7eb605e5e4b5af779d424ebe7d13b507fc5c4f31e. 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/QZHZ31967780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eebda9fb20b44c178c44aaaf3d4f6805a2358642bedc2609c2b1c13b75ed4c. 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/QZNJY2026110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3643c859d9b9a0d9ecfc1cfab32657493b85b58145fbe189c1193b2e38b73074. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:01Z), 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/QZNJY2026114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd212bc145afd09b151ff5bd1620d3d322b6c20fc53051013fb5d5eb94cf0a1af. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJY2026119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283fa0d625c81374ab26288d82ed9bea2e330c2682e75ee4a1e668db63149885. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNJY2026121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7a20964a79e8c3d5ee13e7d4ae6ad3b1750b8e3b6d833dbe3a7089b7eb04e1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNJY2026122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9b4cc7b6c31a084f7886d5b6f52ea546e73f37e5ae7fbf71bff06b428a983e. 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/QZMZ92158911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996f1b9f735554490370a5f02d50bed160edeff850f4b38e3af20cb93d74df7a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNJY2110655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40f759c781a5325599dd9b1fa4db14c3831e5948e9b47974f8a286cb4e6fbb9. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZNJY2110658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c68e1430026a44bd3d9290780f0becb81c3f24c86a5d69ba93986ede555bf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNJY2110661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9995d5aae8ad8970a8e5bdb6ffdb61bb036ce05619a19f2781666456d4d60f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNJY2110660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a6fbb22a18c86123cbfa1e04f3cd1d3b9a980edc0e765fc590aa529c4684f4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:42Z), 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/QZHZ62250809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b09ed0a235700a30b945db6f3a170b91585dda9bd712ba3025ed88ea5dfae8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:43Z), 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/QZNJY2235373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276128d4796674cce2f740e0c0d17fed7d598d391aab386a6169a1897fc33d6e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:17Z), 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/QZNJY2235375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156e49ccf7d0f03cc474beb583a7d051341e13cf071df89fde32490d847ec288. 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/QZNJY2235376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b24c62812b10d65d97a70032cd00d614aff2c7bfa5a7cf375a8dd234b1b392. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZP3W2152610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67314f4d6f023e65f533524fa5f2d0e71021422875e48f70dcdc06a4e9072e59. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZP3W2152621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa16756ab4cc819595aa8f80462768fa81d553e0c717cdbb4d64e76de1f7024. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZP3W2152619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf72e61eeba598ef2ac8414fa9688131bab5ce7641259bd7905563154d7a55f5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FRX282358452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c8f86678f0c098201f8b9d9920759b0ded4c0b6771763c0e90d8407778217e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX452341766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b1b82e37621e83eafebf0bc50b4aa249d78a772a98f6fc3e2fcb3bef4a0c4. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZP3W2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a47f220b6a7c906ed183a33719b0475450e0809298c3ef6c76727e8f6f761f. 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/QMDA62444679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169e970a4f3d4be80f2451f4e0d21540b4e7dce872cb81a1b4523fb52ad55095. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARY4P2000250.
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