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 0x160b647be9d90db759d5e17ea65e7e62ea9bd6530c409f82e287f8828e660613. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd3ae506-6d88-4ace-a43c-57384e715281.json and https://artists.proofprofile.net/proofs/artist/dd3ae506-6d88-4ace-a43c-57384e715281.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 0x4348e338b7a0ec6ffdb1af045126e1bef63f8dd4ca5ae7268b0f5b7d7b880944. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWZ2490310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa665943dfe7997af395fd399e6e933385d6b9db0cb79e79686c824514b4f76ea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72464456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed78b8df7ccf51d4a300a8af72ef45f5786a2ccd500215388300b8f66f39588. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES82437014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3a8de76a5c42bf183491b2c43d80a9d85b778f84cfb2f5585033f1faece77d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA72464453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6c00847927f7b13b89408622aac454c4d73d52467ba26c1842be64f62521f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA72464452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63495328ecc4524a7280610206cfa48157148c5bf56983dfcca2bd7b1a50b729. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA72464457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48aa2a963fce6bdb603bf7a98e97114d626f8e5b5d5f7623db9a58ea92e92496. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWZ2490312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6c00847927f7b13b89408622aac454c4d73d52467ba26c1842be64f62521f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72464452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3a8de76a5c42bf183491b2c43d80a9d85b778f84cfb2f5585033f1faece77d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA72464453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed78b8df7ccf51d4a300a8af72ef45f5786a2ccd500215388300b8f66f39588. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES82437014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa665943dfe7997af395fd399e6e933385d6b9db0cb79e79686c824514b4f76ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72464456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63495328ecc4524a7280610206cfa48157148c5bf56983dfcca2bd7b1a50b729. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA72464457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6e7ee747c5aa56945999e352eb55d88ff6e8c1e0c5b74f246fabb65c0cbb4d. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:32:00Z), 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/QZNWT2315013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4245c4667e9a045082cd153165a7151acb641df10c1140f62ba2c862128d5e70. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72305872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf137551a6f379f5e2a82aae786fce63baba1ed4c5c41083d7280e1b4035a7f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDA72305873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8c45d1e817368c39f0a87d3a68ed74a03aeec0f29f871fe3385af5bf7a3211. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA72305874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02050c3d42abd1f0b50fd0c6ce23c30076bdc3ed14cfae5ae24b4460ec3daa80. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNWT2231789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02050c3d42abd1f0b50fd0c6ce23c30076bdc3ed14cfae5ae24b4460ec3daa80. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWT2231789.