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 0x858cf8801613dddfdf779cc378306617184727922445aa22c6ea62e801b3419d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/925259a0-fea0-4ae1-b2b8-0c0e615cdd05.json and https://artists.proofprofile.net/proofs/artist/925259a0-fea0-4ae1-b2b8-0c0e615cdd05.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 0x0442be497d5f385cb87e7bc37adaddc5221111c22e35b743dc6960f1e6ec0564. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:57:56Z), 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/HUA611402494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8e0ba8c42417a70f84444eb82271885308bdba1914f8680182ac4097728514. 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/HUA611402558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2fe0e812d07674e6e75b11b8c26c1134b38e7da9a1c6e75bc91c8ac454393d. 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/HUA611402561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f9e279ee6acfbd1fededd8fa1e6d050bfc28239ae7431934b8edfecb99d941. 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/HUA611402352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe841672146dbb5893f45474f1b3567fe310ba3d05e1765a9877854484183ae6f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:44:41Z), 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/HUA611402356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6298e4030d9ecc46cc30f920db19e25f1a7d5ecd02fd60a3a26f707d32c7da. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUA611402358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ad9d2945e938e14bf9ca78321b9697c74c40d708631e7383433fd06fe43d8c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HUA611402428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dca021d745186bfebabefc8351ffcab5633e297958846b1c4cc39af4894c87. 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/HUA611402430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89ba73dbf06a7595139110da85e9ab5c3db61e431ea7b18a748bc4bcc0098a9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUA611402436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f7e2d71231a1d17f7a4cac6af04233f2c9d71637be239e3b6022b716d3c8ff. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/HUA611402437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f96def081537a3c8c59858b8375543cada1b8c52463fa60fc36d343f9ee4a0. 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/HUA611402466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88e1a1ad592e82605a4cd060cab5aedaa6e92288828df33d156cdb333e07127. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:50Z), 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/HUA611402468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320ec03e5ea454e5ae31286f747eccbb6214b98e0c6a89f096a7c8dca9ec43e3. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/HUA611402476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d21b7b4bc16f066a5a2168aa6fa765210ae17f6ed622daab09ffa37c13aa967. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:16:41Z), 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/HUA611402591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09462ff62a884435c4783d11936d7e904b65ed9c069f7ac454e174df8f7c0523. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/HUA611402407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda3eab3265bbe924fd2b3d1c863611d36b81126e955042e717bd0f2494986da. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:21Z), 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/HUA611402408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56deb0fa669d985a0f4f6cc8d97be54704fd0e5cc261ee3e2f185e7bbd72bf8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:56:05Z), 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/HUA611402411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122cbedda7d5b425a5cfffb5f96917a5173676157ae34cbe7065c1455dfc91ff. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HUA611402455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb423e8c1e42d32b2aa732eb301fb74ec841e3efce9e80d31b791f86e2ddeff58. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HUA611402463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc1fa62c526cf0c07eb99f0944644cf3da588f873213dd2dd3c7570c2c7c3f1. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/HUA611402388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8a7331d105022df29dc7faa3ff7819890ba055522ba597b693251bc78b335e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:17Z), 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/HUA611402391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b394acef11bf22c4202373c75fb386551c9985180789fc0f8a73edf62792f45. 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/HUA611402396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c372a4f7d381d623d8666429b67efc00da972a2e49cd071d6b174d5903d884c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:33Z), 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/HUA611402397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1c9c1e8e5fadb3d87aeff7478fe42798e11df73326d0bb904e4aef4d47eb67. 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/HUA611402400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc6c56dace977c2c6fc1fc57002b605fa5c4c2b7f06b1ada4ad8aa5450df6ff. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/HUA611402420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d21c7646a076d82945f8641f57f6cdd5b4e841db5e0254597a8e3be00d6b359. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/HUA611402423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68a7684562b228206755fc24049741198f12bc833519478f7f7442085db91ba. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HUA611402424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6910456d3472bedb8eace00ac93a82784995a664d557020c4bde018509817ff. 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/HUA611402425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc685a0f01b062710c2edf3be09386c226ee286caf9c61996d1297202d777ad34. 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/HUA611502944.