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 0x902cf6b6f209f790330016e864883666dca3a2c55ea3fcfa64e552d3de36b5d3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bec734c1-a742-44f6-a0f3-87a32174722b.json and https://artists.proofprofile.net/proofs/artist/bec734c1-a742-44f6-a0f3-87a32174722b.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 0x78d24c41e4211368b485b8eff9330263cf58d94621ea225e51ba5ba24ca64fc6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US4R31243562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8ceee21eecddf3df9a58477dfa12cb126f16db76beb15cbbc361c989ce0521. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:51:19Z), 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/US4R31243563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329e99e5356c819df256667301ffca13687a9739b4a8334052905868fb3b2489. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US4R31243565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048e49558655b191c3efe61c2686ebd3b0c775d19bac96d9fb467b9d0a02323c. 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/US4R31243566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40cfd9306af7739c13a922de5582d32e7aa5570ec6c1e16f41b2ff3130ba3cb. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/US4R31243568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d289086ab7820d75fa40d073dd35dc698437e205947735492d9dd981d6fb0e. 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/US4R31243569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5f776235a85fd14891347a526ebd0d7dff9120a5606684139b64ffbae1080f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:28Z), 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/US4R31243557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf789b789fd97c8c832c161b3a7ae1fee61ffd7cf9b4ece73ccef07902996d5d7. 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/QM6N21984236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245e62e66816d27d252b50acd8845161708d762a6d1541bcb11e0d98bd9c11d0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6N21984237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744b984c882ae969300354ede5c47c6203ef10f5c0b7cdfe05e6df70e49a9569. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QM6N21984238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab400f7ca9f334d32e865b82a368efabb48038bcc48d5a2f9df32534716625cb. 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/QM6N21984244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01800426075f5ca82150471893bb893aa16fe9d43a042ffe9539c7163a5734e7. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:07:40Z), 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/QM6N21984245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999e114f2c1b684b01fafa90a1f1391b3ecf3bba80d2f5211fb670ab660248a. 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/QM6N21984241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61c1f1826d6a8c88089bf7714f4c76980844e99774d85cde28991bde1d00275. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7282154949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fbf0b97a329c27a3095b2720143d258094b8427f19c1b2900ecd1c8de44faa. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:33Z), 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/QM7282155278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62c17ea276e41ccae8ee8ca28e8df3e88d4b81dcc053f24fd1f710a4bfd31fa. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM7282155300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894447df303d07d98313d0c74b56a39e70310b602d11830973f035ea91851b75. 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/GBRB62100009.