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 0x6defddd78b40cd7f107da2502ad71422e81ebcf5618bc95a0680e8c9171e6cf3. 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/40abe76d-82e9-4eb4-820e-e2a8bd99af6c.json and https://artists.proofprofile.net/proofs/artist/40abe76d-82e9-4eb4-820e-e2a8bd99af6c.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 0x68f87cfc478128f8f5289830c43b9f1c3f16897cd5c7e8a19ff885a02bc33883. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEF091600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485cdbe5f1aed8f20194e7624988f9c6b7b5b996380c81fcb323ac1aedcbce71. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/DEF091600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd836f492ac5bfc4f42b2819d79edb946f7ada3e13beab673c69ceeb497209f0. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEF091600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a06b8e4fb407e2b9c32d50f244b31ad75a9e88d7455d5afd445a69af05ba0c9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR10S1793787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75376a9e4f4131d4c7bdb33467268d2113b89382a5351b31bfbc880a2897b6b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEMN91800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85794d19d9697f4fa9dd9baf701ff80488ade5e62bf10b79e0ec9495c7d8cd4d. 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/DEMN91900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05768d2dc5c17b902a59ee6d3e12f5a860917e2dbd4cf8326e1224ad784de6f4. 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/DEMN91900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f39ad781885da2f1258849f98488a1949508519fe31a65cd4fb85cf8f1a84e8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEMN91900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fadad73c0370e504b69ba2dff2bce3fe0f1b1349ec39c7d47a42d9ab77f726. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEMN91900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ac4391a2eaaa738d70fc20ba75b2111d029dceb5569316fdb8db215d44e7cf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEMN91900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1fdb9f1dcced004f5d34468f5039a2fa6b051868cd3af2b4bbcaa5dfd0088. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEMN91900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c7beff0b74ab818b89e28d5f6a25807288e571d45c60e22ee97a874a7b6405. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEMN92000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7064feeab67d1404289ead8eff495bbb4cb6849b2e7ef2fccfd51046d70b4c6. 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/DEMN92000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c9b6d668acb831e0095ee901b00fafca5386ce917bfed03fc1edd98de485ba. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEMN92100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b89561d2bfef31dfa998909af4a556c1f868b46ec8ccac4e840c9d875004b2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEMN92100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8396b13651c49f846483554cfd43ee0f12d7d30d1033020145c506885c475e0f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FRX282138449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a1c45a60b82a561125d97f18ec32893acb18e6a138c6790408b1f58d5fa421. 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/TCAGG2257317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e5fe23b6e299fcfc508fb141488042732a898e25c0bee4cf5ed2e8ba4946db. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAGK2241351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c3e330021dda1dc3ecf61f007dbfaa58beeb3cdc9795868b29b5343fc89598. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCAGF2237100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df9abd8577c38aa730ff7b091c34cd9cf92644135ec245953879a6c9cf0282a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CH7812241676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b3ab841390ad68c972139565fe1304f5d7f4f94dbd2e38fb3ae01ddce032b2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812528555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5703d71eebc1660e98ab3d352d6acd3f6b60822d341d9893380816829d8bdd8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DETM41610739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c4835903dee180e32ec19d14341b067b1933763ee3efdafc131cc8cc7c7e92. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DEQ121535630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3557df03aafdaea655eb9a4ab5b31576ee91fb3c0e9e92fcbbfe35b56f282e18. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S1790648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf749e246f741157571cca67d87a8c5760d37f02888a2c61341a6310f855586. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEZW82100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aa4e26494d6897dbdc09fc70104d28d57a37e18368715e3731fba02244b36d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZ901301278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc99b708e179c90914b4034f7f14242e6fd07535ce2c54d768fca148e95990c8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH7812236271.