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 0xa18e42c1892a7412e98d30da73f643bfa10d02a0de4372da47ba4ae53cd74ad6. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7c78623-eb12-4fc2-953f-9702d4c0a61c.json and https://artists.proofprofile.net/proofs/artist/a7c78623-eb12-4fc2-953f-9702d4c0a61c.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 0x8fa8b4caf7998c3f495731cad1f7a3b2ad802e6e9f6662c012bf4f259c019f3b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:56:54Z), 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/SE6XW2300722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc90c2d091d5904fa712c4c9d5be2930a88b9f44925f317ff55f3198584f736. 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/SE66N2367703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3345241ab2fe1ef474f9029860ef4c46b99a3042e38a118f20cf312792d960. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/SE6XX2394651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1f885f1741a173ece429c1a7376795b29076190a00c31cdd0891e632362e71. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE5BU2490841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e901c78ca8456daa29c16d656b635f8bcd13dccd0962c1ad56ae6426850423. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6I32425918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110b1589f0eb62764198558893c3f00d8c1f7d592b96ff82b72496e66aabf69. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/SE6I32462829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673bb09b0db10aa3707c09a1a0658a45a2f61207cd1fe10e69a4cdd4c38bdd6d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6QE2466744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27d6c46810e2cc5b14f9e8c36dce48312ef4996ad3c87eb2ac7befca07b563. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE6XW2403256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56678c44225f99ade5328b2c2f43e36a860d2e262623299bc7e93485ffe0c9a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE5BU2564923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8047f60d2f4b34d398338c8511398b31e566b2137a4a5f258aae222078a6ca5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5BU2564919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5685f0d28cd18abf04fbc77c0933590f72268b1bd87a8892de4c54483fa0436d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:40:00Z), 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/SE6XY2547812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f2e8ef87879d4bafadb02b57d130373b720f3f27df46891097528dc6ac6e3. 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/SE6XY2548092.