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 0x8823f01e01bf47a393b91f029a0fb79b208e666411d262b194684e64e44f98a4. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c56efef6-aecf-4a07-a1f5-a41bfdfe710d.json and https://artists.proofprofile.net/proofs/artist/c56efef6-aecf-4a07-a1f5-a41bfdfe710d.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 0xec442b5ffbf73b68ec72aadae6e7f267dee75497ae711ab3d07e76ea536c19f7. 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/QZS642354339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6643d6f0814f9ed28124efc50f3f9e05a9ded99eaa2c49bb398e5fb23446c1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:34Z), 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/QZMHL2382749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303239186803d8ddf4843ce6081b007d8f22b9bd6e2fe4a332ad6b2824181508. 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/QZS632351555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfd7adedcfba6159c87488ad9b1851f879a1d86a7ed365446f58ca89c615ddc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:22Z), 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/QZS632384554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed26f814eb3bbb940e6c93e097500b15635096ccda0809f3900396e97087989. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZS652268815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854dfe55ddb550d2e9c38235f384b161437202aa8998c8d8fc8ba48ba1fc6323. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZS662216436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23167ef4986284410bba720e73ed9d5486f35eda29ebb3ac9ced9a930d2e2434. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:25Z), 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/QZMHL2293890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4445e8b79bdaedd5b247f6c1d5cba2c414c85a8653cd3bbb521a5be0be6bfb. 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/QZS672423678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ef1cc9076177a171feb6d2210a2f9b63387618598e2691375a20885e82eea3. 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/QZMHM2465969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7519057e0757c5899950f6bd7e54566009f89dd82312bbcde85ed5e1997a0324. 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/QZS672477547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ad70452ab5ae5845ee424cef5b38a6b67077d88c26587e168ea4d55335329f. 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/QZS672429165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e157d2963a3ef0181c0f202152a58395288b9b0c278260fd048f56b98b22714. 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/QZS652448450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13057640ddf2e81d022e5ecef8591efc0fa47ebc5e00017253b575c261ffeca5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZS632400607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dac431bd2687ffca8047f382ea6951b655e4dc467bcaff644ec6b933ff78cfc. 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/QM42K2514520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157928056c50c3d53ea3a602f5c33ddf11bbfcf91d1696348ef8fa303fa3ace6. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZMHM2548108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4643dee3912f8509412cbd0bc1b62a14798364ef078c2274aad29e47d0e2e0. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:19:27Z), 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/QZMHM2522161.