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 0x920a7a07f7333b41f2b7fa56186a1ee97d991811062acea33bb2111016fd9cd6. 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/286a3085-e6f8-4269-8150-a24f0931e2b4.json and https://artists.proofprofile.net/proofs/artist/286a3085-e6f8-4269-8150-a24f0931e2b4.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 0x64acf483adddbf7437774c3ae6a69682d923f6702b4ab9380dc8525c42e17215. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/AEA3A2337335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222302bba2439c8fbdecf0763f92ed0f67ce45ae77ad81acb88dd7d916b3d76f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AEA3A2218891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7cf140da8fde983a3adff6f25eb66570b2a5d823b12166faaf3b87c9bff237. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SGW502267785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0e7e5fce220b2dc57401f7c178996170dbdaa21ec4db2e0e7ba64d274e892. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/SGW502281997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4d0756492b9928424d4c59a657e0366b3a0512716eaa0d63eeca8a09280030. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:01Z), 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/SGW502269643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ade6aaac8fe356cbf26bfe8b3a3bea05ee22f5a4d3528fdf3ec594c2da69b73. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/SGW502246787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7a7637926ace02be62ea3ba10180ac9eb9b7e32768bfcf82450928c330b2e9. 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/SGW502274386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e9bb2a6ad82d1f0c83dcbf0d013f7c5e39d3683863b71ce83e6d6f38f21e7c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:39:56Z), 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/SGW502251611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83f757858eb5e1da044f0c512398549c6d9cfaf6c53304a30de558b45aa5dca. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SGB502583951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3918de974e138a4d5205141960e67eb8b257b0f44303ac153baf01fdcff78eed. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GXBAV2503203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcea50e8a96802472c8a3d84bc66fc254e36b7666d32c1c6d728dffef0e4c7a. 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/GXD7V2548394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4e09817bec8b0a2db7ef11b2f636f4673d22f4df67db0ff2c1c57d641972eb. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SGW502584544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ea6a387ebac45f42a5a79876d9a3854a764c5a664b5c8598c0597f5a36cc35. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA3A2597106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c2b5e01f9f1062dbed6bb5e48a04a4631a4a1a1850c5b2017e5006be7b7d6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:50Z), 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/AEA3A2162919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc97bd019982c3aa321931db11ce66ce8025e7ee334ef2a22d07d999a73f500f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GXBAV2194237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e19d173d2079da9645a96dc236c4c3b73ba90efbbb0afd51738dd153230d63c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT5M52522690.