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 0x8f78ede7b0300a4b009e7ff8e5b8d35cfef55326b04d048073150e1582be091b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3ed9c71-e5a9-44bc-95d7-1daf3be99037.json and https://artists.proofprofile.net/proofs/artist/a3ed9c71-e5a9-44bc-95d7-1daf3be99037.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 0x417969b6b312326a566fd3ac83379fed390d23dc45073643ffb26d962d130293. 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/USI4R0810180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4952f428395f07f385f60a1f31d328a199a35af379ebbe980dc02797d28e234. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USI4R0810177.
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 0xd25d9d1fa71f8c26d7c248697efe82cf96ed77005b82475b8584efe1042d8671. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USI4R0810178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06efdb2af94ff50fb498ec985b2387cf2bd93059f197ed4a31fe3e028b1b29ac. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USI4R0810179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5234f550ec42db222a9098e8f73aae6b4e75edbbaf6272d953fa7672f366cdac. 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/USI4R0810294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50992fd90c6febb9a2137cee47af538ccf74de187c6c1ecb24d86edecac1c6f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USI4R0810295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad3633b0ca4244704ceeea700d8f15bcef61e9a913f172d602594ec486710b3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USI4R0810297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171008e77901ed236f5547f089aa863c1b473090422cea5af01a55a189de7318. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USI4R0810299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe6d542e35543745483cbb0f8dd6b3d46685c14c7c637905ca46edddb40eefc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USI4R0810303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e6fb1f9d6ce15bee13113887cc359145fc3f5b5d39a6848e2730e2841eadad. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USI4R0810300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbc8485af08e52e873cf258a9bafa00b0056d9bc17390066c07756d123a7be5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USI4R0810301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabcfba0cfc81100c4be6cb1137c8f8a8096d6239c0b303791c1aff9d96947bb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USI4R0810302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f6508ea6eaef037be465ee3772402e05fa10fceab409a837be6570b52387cc. 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/USI4R0810169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64d3ddf2feaa928fc97a485e4ff6157713e5be08530d8de54ad1ce45d4e00bd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USI4R0810170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2269c7da35ab6b4fe51211bdb8889710fe65819bb8c9f47e8241a120211e5c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:57:16Z), 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/USI4R0810172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcf8edad489da8451ce181fe3981ef0ee5dd1683ac6118ad11c8dfe0fad0920. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USI4R0810171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23442b8839299470a10a62193772456bd6772a535b03522ff3b05e141eec4d2e. 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/USI4R0810176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3143d7493f437f264386fa3d80ec3b4360e8713a41a8afa8049cde2d2b7d1e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USI4R0810173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05953bc59f81e530bed6529258bcce40b6567d65509dc82b0ffa15be571d0b6f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USI4R0810174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0a5fd6ca398a90f1cd9cafb51b3f4bc4e2eb40d43ff85cf042871632d62b24. 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/USI4R0810198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72201c7a75f54665de38106ce855ebee52b61ad789ac9d6bd544b334150428d. 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/USI4R0810199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5244d67ec89bdb286d5a301262c40e53d3fb0ff679806a89b3bcccaae8be2dcd. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:55Z), 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/USI4R0810195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00315043fa441065581fffa2a37bb87378e2b3791e3e45d674f366544453aec9. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USI4R0810196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96c983e3f136de58f9de3d48a79c7d0d15d8a4e2ac71da3b11dd6f6ef2f8eae. 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/USI4R0810197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8c566171a0e65a190f2f04ecbe2a20f3d6ee06828a98c1031df055731b400e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USI4R0810200.