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 0xdd6c331e743a2a1d73333f55e61f0616ca0e5715123db0b82bc59aceebd56911. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7debc6f-4d69-44c1-8500-a53463d5255c.json and https://artists.proofprofile.net/proofs/artist/a7debc6f-4d69-44c1-8500-a53463d5255c.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 0x128375968c6967287671dbf231fcb322d13d15c2ce610e216373490e9bd07287. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA72575813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122ee74f7aee1b75f9f41287b93de61afa8c5d99717d56f1f9ed00114296aa9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:09Z), 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/QZDA72575814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb698d257c3fbccfde4c32ef423b427cfe4ad8908b7d50f1d2aa0606e917693b5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:56:38Z), 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/QZDA72575815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ce6ebbf20eb8fec17c735c060110bdedb23bf0b8f298c9a4908e6cae3d4e27. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:03:17Z), 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/QZDA72575816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8cfae513ec8334b7c1364f7c3e91ca5f2f76111ce9ef2f2e48643657eaa47. 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/QZDA72575817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f7d57db95e17214b66bf7bb11bd6deaadaa0f6f960ea9a051c4a332d1c3409. 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/QZDA72575818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b7f55d785057ceeb7c925fbcd014e15b6b652b2ede4fa2ece4fa957191c2ed. 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/QZDA72575819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eccf72885f246d46921f20e11a1d702b431af8c14444dd462b4e90ca66b6a09. 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/QZDA72575820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624d681fbab5d1caabdda3ec89b6b8ef24389578c6e707d522e77801b2eeac9f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA72575821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3661f7990baf3c71685e2128edd34887d325382619b1aa429445ea4144cd28ba. 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/QZDA72575822.