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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d98c12b08ceda83a0597498ac9f989b07c0bb0d674c7552cf7e42dd42a3e9b. 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/acdfeb44-498f-48e2-8cf3-61e9c51faa82.json and https://artists.proofprofile.net/proofs/artist/acdfeb44-498f-48e2-8cf3-61e9c51faa82.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31afb39e87ec56736f94ae998f16f9c801b0a8aba2f5aa5f0be24857e1f11be. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEZN82475169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d5409b0b264ee75e2082ebd84a09eaa14eb38b050b747d4f0476096b7cc694. 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/DEZN82475166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd21978f5744bc972260eb49e27133ea5a607e56efda803bab2768a9d19c528d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEZN82475171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e96291bd2913ba719e120e317cd1831f0fd54a010ef18bf6957377cb1b8476. 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/DEZN82475177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab8f2e32a789b595c5d7b23257d495f52b0a08c909b60786da3b6213567a17b. 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/DEZN82475207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9b0d7c715986ef93cc7c6170392e0d45397568cb2b1d03139ed9abb5fb600a. 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/DEZN82475206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad590c5965dcee5c7aa8903dc5965e049f7074f1cacf4f845796e5584d97836a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEZN82475205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60708cf941c0bc5a04215224a9c01ec9a5f9e381ef30e4b0521549ef976f1af7. 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/DEZN82475192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06fa2c5ad8110ae87602e5e794b10eda8d945741d4af5ad5f2fd37583c3610c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEZN82475179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddffaf05dec2d15c4d76ba7998d567fab1a860f21f8b70b2d56cf3b0e0661656. 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/DEZN82475178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec71e61ab9f9cee0dd00ce1aa7b01224e2741349b349c1d8b58d6922676b4f54. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82475176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435bec9c3e439cd7d11e4d8bdf44785fce6adcc921bf57e30aa86f2d56dfae6c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEZN82475175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1352817ce7f58220b4956660a907f03f0fe5c59c5d32462a75a6b594a04569e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEZN82475174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdc358fea076788c13dd599b1eb7f2bf8a280b5de053253c9ee1d718462b8fc. 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/DEZN82475173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259711af0099a24f18920fdd6531871f4024b5ac34cca50294a81cd604c9b655. 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/DEZN82475172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a2043964ee7cf6ac0f6218c372bd81b31095e5cff0c0d588e111bb7b014f21. 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/DEZN82475170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f0087b8865586eea9d973d69abdd9a692e16c82f268b031e90981d08684646. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82475168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca5cb5e87ee85bd597e59618c23e0fbc1c116d4c0a537efd4da1094ef4667db. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEZN82475167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aa9725c49cd5da54b5940b15f42894b45304ab633a8888a658677cbcede3d6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZN82475165.