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 0xe59adbc4575e5bb9fea23eb7d0950d617625a29bcc57ba6873930ff2ab3f671b. 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/6c78821f-bb2e-4732-b718-9036bdfe836d.json and https://artists.proofprofile.net/proofs/artist/6c78821f-bb2e-4732-b718-9036bdfe836d.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 0x8c7858abda1141943c87f73d2c5c3951b70adb7bc40bb9ad34854506c413e80a. 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/ZAGN11600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7080c554362ac415bd0cba66963c7479c87e0c3f9eac79bc9ee49f8013d37249. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZA34K2301592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3d032f012bc008d8a423a98d85c3325159ab647337fae274d133b4f2f0b4c6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:50:16Z), 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/ZA34K2301593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76174552f90c4f78fdb8fbe08685fbb5ac9a1683be2e788826c042a0f21161cc. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/ZA34K2301594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb027315a40ed034d46683b99f6e67a681794b69f38f6b962b2605f244d939890. 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/ZA34K2301595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a5fec68a8d50887b54a096841446ece004a16f4580103b5cf2c77f9d5896cc. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ZA34K2301597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663cb56ef0744b4048e17aff8736080a5c818eb1cf7819ec782f97db3525b537. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZA34K2301599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3986ef522a547aa538c378a9905a8691362e7e97d9b641286aa0f4ac9a39fd58. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZA34K2301601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc087ef68052581ab714c4448d01c030726af9625383f41921a0ec10c356f3adb. 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/ZA34K2301603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f118dcec209ed0de63f6d7944b7c121ec9f5b9c2034c0eb663d322a44ff54b4. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/ZAVWU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb1628488586d637cc9890f378b2e77783c934e9507191ec6dcdbf2875de2c4. 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/GBKQU2492826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1003e2117299ff9394f9eca0c5dab3d6c4f3e27119a51014f8484f3c0f14da03. 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/ZABKR2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15be872eff93142d741988b7e986efedcaf6a6bacf1a72cd94253652100c6b8. 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/ZAY592300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee73cb4153bae9c8bd218cfaaf860e6d4887e9615e9707527f6bf92a4ec20e8. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEH742405313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b266bc6a79af4a74a8f258cdb66ba1d2e0fd1251e3c5663920ea5ff0fcbbe6. 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/TCAIO2463901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60654b30f760d075681c13882d15048126c4079e71331d6da1ed6d9a05234eb8. 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/ZAC012401568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e8b316ddcb8f35c2fb8ad8c2e3d1b895537589e66cb98fe5a8ac4d27d77e9. 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/ZAY592400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbb467846ce385b36516b1ded8e156c1197d2a75f384a4415e316c416b98d79. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCAJF2531164.
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 0x4cbef4330f542926b5887497398fc014df5e2abe43a6e3167b25c73e7fb217ec. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMER2298374.