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 0x52c411c94f7dd677e2afe797fe6546afbf75ee53f3d036c4e96d377bb92b2314. 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/c5766e23-858b-4e91-8ac2-c0d1b08f7363.json and https://artists.proofprofile.net/proofs/artist/c5766e23-858b-4e91-8ac2-c0d1b08f7363.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 0x035809a63913685f6ff1247915524250d7873287a1b7f045e445c3a9cd8e6b48. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PEIF21703144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2939e92fce645f0258b2a611fc39e0e0dbf4f23d86100c277dcefe99d6c4300b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:09Z), 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/PEIF21703129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65c0872a3d5003bb2b8f0c71e8f53154294716e2d54d80c7ce2603337e6ab0f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:20Z), 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/PEIF21703130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d2b670bc8341cb50f638662253e43a8d9f2d45c5f0f6ca3f4314b75d523d0d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/PEIF21703131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580af103d6e28e6750b51d57e6e95261717e67ac835382d2e30ff714c16ea38d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:13Z), 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/PEIF21703148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd810d4eac491e3663ffc89565b2448ddd594ebd80a00dbd525179da3171470f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PEIF21703158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736fcaddc7aee61d05ef3790a6eb781907120d14f0c0878b4a65dbcce4ac1ffb. 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/PEIF21703149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2867142de471ae8553a716bcd0fcf82c81e8a5ad4391b0c4f1ddc5d1f0ccd96e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PEIF21703159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f686648faf4773a67ad1d0f54dfa965fe53e335b1bed9616fb78790a75162e7. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:46:30Z), 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/PEIF21703133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952d97a2011b2c9e9c1be11ca546db154e55a1d1eddb9e5d94fa6401af8ac93c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:42:31Z), 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/PEIF21703150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf81038ea183cdd87908071caf932e678621ed0910259e190cf7638b1381289. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/PEIF21703135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0d4fb4272c84dabf92c13ec5e4fe722e5fdb8df4d7cac005170974f234beb5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PEIF21703161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273b63394faaae7c54bcfcfc92c202015d8b18e4896151241aa56e93fc010764. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PEIF21703137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9624a12446efeabda8d7005321ca3c7e85f433180b69ae87af51f8ea1da1208. 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/PEIF21703138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c366dbd2aa60cc884540e15f166366a3e5dd395c11af1cd69add1611dcc5d0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PEIF21703140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006bbb5b555deb9140267a882bfa39366c0953f54ae675064ffd0e90ef01a789. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/PEIF21703142.