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 0x375d47ae2ac29a34c5a346f6707bb34ff6c59a69e148c3c341fc2fb9adfc3463. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46e6127e-b6a8-47a8-b2a5-669f21ecb3c4.json and https://artists.proofprofile.net/proofs/artist/46e6127e-b6a8-47a8-b2a5-669f21ecb3c4.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 0x0950352cb17e649656b646260311ac1314dbe5e94a21603aee1aa94206fca3e5. 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/QZS652305763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc6e7962005507a0ff8c175badf5f7104af2f59c147c7a4142fc4cf4edd4a20. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZS632322498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a875bf20513358a122f62d06eb30e88120b59b8725fb79738de241966d39c3. 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/QZMHL2392598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9304d9cd8f193e18cf724933a0f3f6c0faf398f530b07dabe47562ecad38ba. 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/QM8DG2486940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f17f806ca884250de6fc86d8a8def929bd7fb47f204348cd66eb177f1071ad. 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/QM8DG2486942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b337468835a544c2fd59ee699d03c17241e9466d89804b40c792b89dcba8681. 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/TCAIM2438022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfcc5517f36bc3e96d1c908d3e5250347a5bdbf9ff728597bfc79bc615f95f4. 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/DEH742417584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff6b6f217eacdf72878261d5ea056e34e968ee84575475bc3925a9aad31de08. 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/TIR020201570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9896443e0e8e5da088a6ab1a98d17909d7bdbd5278ca78ca073c0bad42ab3fee. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TIR020201571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522388ee4b1cb77270f51fa6ef94cd70a586a1e34dbca86a49e2a4600d26ad4b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TIR020201572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53afe3b1136d8451469d21bd3ab54bdb19c127a87f51fac95d538a7a240cab3. 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/TCAHJ2374526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39da3460005c9d900858e40eaf51edbc08033632af019d30fdfefc359f7ab043. 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/GBLV62215683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ecbdfb8fcf2fefbd0ff770459c694cfd1ba4803369c3703d58b2ea75b678f0. 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/TCAGP2272459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e231dca18403b7df263828c507de8b23bae6740ea456a5c80c5749de3f3c0e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAGG2285921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf4a49835ba515e6af2ac4b42cb7b4d0fb7b5aa7da95b0451b4c162f5ea8d6f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAGG2285916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9022bec6f7884e31a2529a84c221d4d82b55115dcde7e28dea6638422ec1dbe4. 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/TCAGB2237723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ed6917643d23d7209b03c549377a85babbd8a9fda12fc2e6401de9603d1b1a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBKQU2427981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608a2faf3e05e1271a4ba1fc40df2b433dc74c7ef49e9f1283be2c578fe417e4. 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/GBKQU2427984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112b5865df2541fd90add2fdecda03f142223f80fa2f02a3b57fd33d3df7ae39. 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/GBKQU2427985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bec7c2606c6e5b9779d9c92dbe5582a077ba5019b308474fd9ff490afe77b36. 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/GBKQU2427990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b039085e17170b2d43a8fa3477fb6f2d9877d653f36f7e56f38107ed4d70064. 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/GBKQU2427995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5840a90db41b36a2333386e40d5cc6e41443acfe6ba73a3b7f9cdaa226735294. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBKQU2427991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524fb4ffd60698907e4f967642bcc45547193e8ae153f8d1b06958f3ae81c55f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTAT2384601.
Nothing But... Hard Techno Essentials, Vol. 09