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 0x48582467afbe68a31cf5f80fa5acd226d4a0bc921108b2ce55af3411d9bb9da3. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6ff0d23-8ba1-4ea6-a89a-dc114c56ee8f.json and https://artists.proofprofile.net/proofs/artist/f6ff0d23-8ba1-4ea6-a89a-dc114c56ee8f.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 0xdd1ee8dece9d77698fa6648417b8a2eda3e0c96d06cb6098a16038cee1a70727. 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/DEZN82530848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff596bebd293a56504e5478a865d521e9dd1a61b9706f96a01f75db2032b581. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/DEZN82531101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25abffdd2da8cd2ed9f4fc925f89465b3af96ddb5de99b9d608fd167897a62fc. 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/DEZN82531187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda51f0dce15c775a17a838a58663f3862b0999c978d8ab74fe99014ee98022cf. 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/DEZN82530945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa294e17fd2efe0ecd69893d31d66c49ef88220912744da522d5c12defbc8fb60. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82531283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fd025ddaa4549d820782baa2af033bf02ca1ce52b4c72f14186e5bf970f2fc. 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/DEZN82530943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4308262de4908a7eced30fdab37f674b25ed97681b01d714f84336244d0ade. 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/DEZN82531067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bf47d23f146e89317a575399085fe0a8c60b1a9100f75c0aec729d680cdcbb. 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/DEZN82530827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ba8212f6e3288d67a81e42447bea274e8671097f14d026ed66b7b5b6dc2d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82531158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f88131e3989ac1ef2d6e7e7549cf824dc447ecbc3631b0adf58a3ddf65866f. 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/DEZN82530920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319990831afff8d0d6845a6aefe5ef0cde5b6ceba50e549928245b42f00b41c5. 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/DEZN82530968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0ee294f9a0675aed6e9854686d97344254b5725c7cc1d6ef54882d46fa9476. 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/DEZN82531014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55e160dff2d235cdd128a8660a4447489ff3a7d8c094a01af92e8cb6df6c155. 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/DEZN82531118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4988ba9de925ec3b4d9cf38e5ccb2fa06efbf7f97805816bde2b4cb61b48f9fe. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DEZN82530890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc4774ab6072829ae64e7420c2e2610d4f5c681c9d736904e228e93dbef1fbc. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEZN82530815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8640ffd6b75ff3d6d1e050cd2e28d7be056e90146687972d193847ddc1e266b3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82531108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0f15e71308f6cc0380cfb8273bedfb17ea1afe99854b3280edd958c3c5c9cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZN82531163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf241313910ef7cc6eaa5ebe8c731302116788dc6de6da602843065e988f1b826. 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/DEZN82531152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c5478c821db30dece3e7602a93485a04d4ca887a7aba68b8ebca92f09c759c. 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/DEZN82531093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc54a7b1fefe26b00853d749c61be0632e0ee6abb9ec77c62c64cca3104751c1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZN82531289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29594f5962b743591073b8247fb84233946a8128bcc5e456a1e555c50483224. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEZN82530939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e44842ce3ef15d7643061705e2bf0f90c78ee5253b82afbc884334b0a1084b. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DEZN82530786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37576e4ff02ac3497beeb7786c898c103942bde6be99096a0da7aae4ca2ae589. 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/DEZN82531195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815c900f56c59ebed284d36b32fdf89c896f0da6cf8b9cfa703e0a95003f4b94. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEZN82531097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a458c9e9f07b2bd51b66e09c33bac7cf00a79c0ca4d791bae29f17b321a677c. 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/DEZN82531036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baef414a0c74150f4ba45fd95a30506f7a11030048d0edd6462b0f26bb91256. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZN82531239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862bd0287d08415170e5f6cb29962654e1105173ae0927000f5d89e742ca5238. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82531230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692219d3dccad47a0ec84bb7ac29adf98a1a25d006b8703ecf81b5a5bb8106f4. 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/DEZN82530950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfd238361050cf1d2ac9e6fb3b97e71ab1afd5048ee3805ea7760298e982986. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82531217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bac382fb49a5fee57c9378a70efd97d278e69d3312ede69b438ea8827419d5e. 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/DEZN82531263.