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 0x5807a3d3de6bc6243344b10c68e419795fc81d5b2a7040ded44afa0d86cef98a. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed2033a5-3b7f-4656-badc-43faad53c24b.json and https://artists.proofprofile.net/proofs/artist/ed2033a5-3b7f-4656-badc-43faad53c24b.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 0x3526c2b081a0ce6fab7a9d54fdb005686a30f711740c0820e356735050a307fa. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:08Z), 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/AUIZD1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e99d6899534d58749b7fa31b130123a83de81c313c93a4e760c2f02ed8a31. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:09:24Z), 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/AUIZD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51b331e897d05dd743d3efe84f1071795f5d425bedfe6b931ca6c63bcf94efd. 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/AUIZD2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979c693a4df200f63ad74a0a648cef1aaa90ad8962f0f0240f31f6044511cab5. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/AUIZD2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0744224974146c703d57dd81088bc293b0a8b41d18bef432fc8e0da6fb80a9ba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUIZD2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca546ca12ffd71f27a6e2438946523919e9b3dd784304c8e7378251a15a4e54. 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/AUIZD2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d36389489490bd627ab5258d62d1c4c4569a1021b5f79f7e7dc65aec0bb037. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:43Z), 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/AUIZD2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721616a61a5e79f49d661104a919095158a2c4b2f4515a1bcbf343a093eecd55. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUIZD2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51b331e897d05dd743d3efe84f1071795f5d425bedfe6b931ca6c63bcf94efd. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:03Z), 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/AUIZD2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38262e8fa0d11d23ebda16eb665c44daae1777783cfda3a536e2ad91c3d1726. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:35:46Z), 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/AUIZD2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b514695ee5f8887a948d1b2154997190c415217ddae7b3ae4e9a83dd71ab0cf. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:30:49Z), 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/AUIZD2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e99d6899534d58749b7fa31b130123a83de81c313c93a4e760c2f02ed8a31. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:02:03Z), 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/AUIZD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1636a9377968806cb31cea3857cfef0d9bdd8e9538775dd6e669f8d3451e7c0. 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/AUIZD2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfc38f9e1986f9ef3def074efd2caa5b2cc7f24aea52c0cf6dcefc96f777120. 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/AUIZD2500010.