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 0x15fada136e5c3d1ca693e692ad071bc2fc8b2f30f537267999dae0b30a56ba36. 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/71724a65-76f2-42d6-9c72-dc9db01e733a.json and https://artists.proofprofile.net/proofs/artist/71724a65-76f2-42d6-9c72-dc9db01e733a.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 0x64a3eaaca39a8ac61804dc1a483b775fba2b70021d372ef83e595a74c48393ec. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:18Z), 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/QZWFR2406215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beafd3b0cd547abd7a4cb17aa891965e3d8fcc5510ca9e95ad22a0c6b86f9db. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN92542123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd6c98d5bc7aef832a481d4b1195b86dddefc1d449eae50f384f63a954494d7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHNB2574354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560bd4630b5af17d81c6b583724c619274297b2db962f62588cfc6b7f0868298. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:17:03Z), 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/QZK6H2536456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ec941f28e7b8ba8449b1ee48c0cf7edf122dcac99b8d8ebb44f1d7d9c9cf7a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:51Z), 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/QZK6H2536446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452c820de3fd4daa849fd0fe562a7118ec388ea99adf857a02f30692d4e31150. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEM2595428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c88d8754c2fc330f186859fec3c98fa4e4b29116ab94dc500f7627253dbd84. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZMEM2595427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d904061ff826fc46e3e3488989b50ead04b0dcbe67acff75a2525c288253719. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEN2512232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86686be5b66b53e0caf06b5365a9402efa8348f354ed511ebf9923373b5c1124. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEM2596628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927494a488e40807fc41277bcdf647df8e91b9f6b9eb6e21b3997cf4d36aba98. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEM2595429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7819770a2c18a9732e375e5991d58548d565e92d615c5cf71858d73d7a02eb98. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:29:53Z), 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/QZMEQ2578869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f7e8f2c154ee37e9a62875e411a7ec85ef94fe4dd60b6f71768f80430b5f44. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:40:52Z), 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/QZMEQ2578872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f29866bdb5a41c823a86f4674f6eb72955a7b331df2de01623f9f34912ab33. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWQ2586790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295726bc49a5067a22fe76a24688c1a43f8261287d892000ffdb9b462d7b2fe7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWQ2586751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b5c00e795a0ed50b35afcdb45ef665776661da23fb3179a34fb36d64da653c. 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/QZNWQ2586752.