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 0x100572586dd0d8d443d20fa7184ba4b572fc0adac9912fefdae571134fbb6ba3. 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/82bdb8ed-ba1b-4c83-a1ab-9f6c1ea63d20.json and https://artists.proofprofile.net/proofs/artist/82bdb8ed-ba1b-4c83-a1ab-9f6c1ea63d20.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 0x32db120d47878a3c546e3cbc956cccff3f26d2c19ac9dbc842bfff8beb877ea9. 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/TCADI1720215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665c17107a39cd7b94fc0faf327c2b471f5e7186d0d6be8a91ab5f420161bd09. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADI1720221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2221bc40344782dc19f12b8f36062cb15365d9d9075f220661c2e4ac18cdac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADQ1835172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58eb868c6c25afa7c648bb1112b8fdee5dfd99e90f7b3e91d254dc12883e10a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCADQ1835186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d40af25bd4f14853ffad12b3b45e8007d7cac1c4f868f98f709694f3535bcf. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM4TW1997796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f5fbceb8e79ee8de36acca7383cc4929c2769c10e567c2511a20738d45b5aa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TW1997808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b2365b44f2b326191265b6b1962fbf294a5bd9e936166253304b7c5e28c92d. 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/QM24S1921823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d853e71c7d0776fb89b0d8434bdde1ce12db35d2490d2595b89298fa33e76ed. 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/QM24S1921824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485389694c2174d21c1c515c3ef34340fdd468ae6c810ad21d938977c09a9bf5. 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/QM24S1921825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2928412b2828397b6cfb76255ee4a2278d297ccfb7d0102c546823d5056148fe. 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/QM24S1921826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50953a0daa4a1670b8a69d60928ea2dd5baa73ae75f5bd5811df884f7ce8224c. 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/QM24S1921827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb6e6b883ac20c27a367c52cb36ef2466cd086eaf64de752c11fc9b667314d1. 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/QM24S1921828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfe2ae81fa21671fb0f5d9c9ebb2535dc96a10563f5f9936924532bfff5644a. 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/QM24S1921829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82be436a2ce55bbbc9ebc4f0d4d24d0f9baa66a3a8650f37d6005b53bcef2adf. 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/QM24S1921830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47891defc9fa948cfad089464e9b95f5c0b61978d3e8eb892dfc4dbd70da20d8. 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/QM24S1921832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12355a246b933a72cfc1556d1656f8bb8d2e27dfdcc4189e1b74d9946cc7bc8b. 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/QM24S1921833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c045bfff8e609e24cbc9dcf9268185e951f539b06b9054b0bc1a421c1a9921. 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/QM24S1921834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bbfb87d2db9e9224f3cc15d38c79554bca6ae1e63016b703036cef153e48ea. 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/QM24S1921835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df36564a194bbda5f8210e3c6ed168fb4179763ad9930dcfd847013c9e0a3e2. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CA5KR2038368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842cac0ae11557a738eef7389c8a67dd02fb789b63572c3076f187543ac194c0. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CA5KR2019097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f159a87be068eebefece5b7cc28f69b1e2309a9f338dc94bc8420891e66072. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CA5KR2037127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af2eeb3cf987a889553136d2c4764e0bd108c00ea2b04e13bae84de4c716884. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR2038373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2be13e8ff1047f0a2a7d59056de393f06b056af01c5d72b486ef3a8cb7b0a8e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/CA5KR2076502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8979b8f2be16cb5561f62b28ac5b3523c080b600733e4a76f8659bc631d5f14c. 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/CA5KR2077183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8538395afcc7ad4f85a73cf28def4bd5de20b0c056b80c974bfa1ec303787667. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CA5KR2125384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3705d98fcdce16514ae84d08c0e409cf21d205536de8c61b0d5fc78d1ad55247. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2115478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8979b8f2be16cb5561f62b28ac5b3523c080b600733e4a76f8659bc631d5f14c. 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/CA5KR2077183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae177bdad46880395d9a8a3f31c3f87e18d8fd44a769f3cc5bdda564b4f60b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CA5KR2125389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dcd729ea6316bdc3970417d899f1af4c2caec2714260def77c081a6841367e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USUM72114768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81779623405a1f1a856a25688fe3335dd6341decdffb65f4646427ca844e16cb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM4TX2279772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe66690711c27f4fa52fbbb5cc6e211501cc62339a8f258a9a4e6f4ce9459b3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZQAY2515416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b4d615da45c6cb62fd5880172c205916b6b452a72c00ce9d122a2dacc63e49. 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/USUYG1267068.