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 0x96993043166e664e202dd8a4398d30f8deb9d77d469744bdbae795fc3d2e3b65. 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/f98e7be7-b72d-48c4-be47-bc746b80dc55.json and https://artists.proofprofile.net/proofs/artist/f98e7be7-b72d-48c4-be47-bc746b80dc55.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 0x942c3c7873ca4c23e128f8bc963d95e276112410ff66afde81aefbe4be7fbf1b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:31Z), 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/QZDA72503168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f66c57b0290b3f438fef53f599f42a9ccbf80a9bd45684d72d42963aada22f8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7T2599069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82130d20cb44cc10c885c548fca0ebde009915197d89fa066204611a342d67d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7T2599070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103dedf58ff83f080309c2d73c9574f1c44ca00424bbe2d1768de0f0b0bbf011. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:45Z), 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/QZZ7T2599071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0689337f16d38a08e96dcfc0360f46f3ad45d4602d694fd101672fe609e5cf17. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7T2599072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef426f55725dd9e802bc0f045b3516412a3eae91ebe274996fcdeb8b07a8f129. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:24Z), 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/QZZ7T2599073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74eae7970ce9fd29a53dade90c8b80b39b9d1e3bdbe39ebfffa52f837a8cc83. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZZ7T2599074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0600ebaa5e63c4360c6bf2768a793f8da4165391518603214b6e80ca9d4119fb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:00Z), 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/QZZ7T2599075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a7cd9481894b5d5dbb0c5c21bd39091b3ff24ce3e223bb74a3942c2d73f0e4. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:02:26Z), 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/QZZ7T2599076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fabaf3ee27fbc99653992e3cd67325b26c34c1b78da5afdfd950d4bf5def648. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ7T2599077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfcce1b76ea337d630e60f88c9302805ff73fb9f56465a2030c39e6e9053ffe. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:00:38Z), 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/QZZ7T2599078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b89b57a85c9c2ac72fdf1239de3470379b65e432b0d4124700820d9d5a3082b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ7T2599079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426836e4f10b88f7e6d409af03a66b0d1d09775a4e48ece221154c3d989799ea. 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/QZZ7T2599080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27f35c1e15fb6b534cc3a743678231117b686572c4164ad422118fae346d92f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:04Z), 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/QZZ7T2599081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fc3520ccd6e9137c397f8fca9429626c6334d00893517da6425594557335ab. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZZ7T2599083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611f19879388e0c69ed3fee7a2e2bbe79b83687f0522a8c8ab60f84985b74c6b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:43Z), 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/QZZ7T2599084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f9cb3e57c6ea0ecafe418631176649d9161e90008ef8e828b449781169c953. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:53:51Z), 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/QZZ7T2599085.