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 0xb1a3b44baf2391f197bafe12a9bc13a246babebfa7be2074a30a2e0cfe8a6311. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0d304a6-d417-4fff-9edb-0e2a7e057a7d.json and https://artists.proofprofile.net/proofs/artist/f0d304a6-d417-4fff-9edb-0e2a7e057a7d.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 0x58dd537b3e3e14fb68bc9abb3b8306dc26fc7b802e525bc96dadba198d5406b0. 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/TCJPH2543721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a10536411e2d3f9e8771269590f1bd5085c73dcb2d9e66a3a61b948111f7ef. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:59Z), 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/TCJPH2543735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27c0b91db2258406f12872414a00ac07b62bb35108dadbbfadaf1d43d30f3c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPH2543787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dd537b3e3e14fb68bc9abb3b8306dc26fc7b802e525bc96dadba198d5406b0. 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/TCJPH2543721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a10536411e2d3f9e8771269590f1bd5085c73dcb2d9e66a3a61b948111f7ef. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPH2543735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a13ee256306680f7c5601d1b68e4d97d14c11a2e25ae78bb55dcc93d812ac85. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPH2543741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27c0b91db2258406f12872414a00ac07b62bb35108dadbbfadaf1d43d30f3c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPH2543787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793d6671506335829d37ac6c2791892ec25f41a6c8cec242bf31087c3c905383. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:27:51Z), 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/TCJPH2543793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de2a85d71a5baa0dff158f0c119b7a46b43b29edebf1e58919aed9d3d7bc076. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:51Z), 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/TCJPH2584827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774bc2549dd96a1bf7b9a1a84fa3fece14be312e8c05545760ea9a038cf12258. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPH2584837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a1eec04ead2fadafe22ed9cd3c886693ddf2d496c88befff8ad8a4b495377. 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/TCJPH2584846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb4b366a22c17981cecd89506de89b0a27aeae9b5ea02d48fdc7675665fd0c4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:14Z), 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/TCJPH2584857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa965fb30e50c15056f8e3e95418ebb35a54925bc8021738276ce961135e54480. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:36Z), 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/TCJPH2584861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb5cf3432e6dce1cbc5bc0b9f2d3394cc278175862f38ff64fb6b6cbc1da467. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:33:34Z), 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/TCJPH2584978.