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 0x636ee973b1cd41eba05814a12f3a50c0e1a8e211b33508fe121b7a3177cbe752. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bcefa33-5dde-4089-a802-119f132021ef.json and https://artists.proofprofile.net/proofs/artist/5bcefa33-5dde-4089-a802-119f132021ef.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 0xef616d1adde20b502e9f681150004bab2199aeac7d0ba3ecdc39ab74f108b8a9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1118719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a96eb613693936ef43935baa04ad1c236fbd63d9e5b9df2730d7dac5802d8c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1118721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbdf0d35097ff9f33fff25a413ef388f466728773fc56acf0575ad2cf7e0f17. 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/USUYG1118738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62e6256335f66e2bf4ecd5ecfded441e45730e895150fcefb2e24eb38ceba92. 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/USUYG1118739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd401faee9845f75c0dfe8b198803f4027df0b7d77b431cc2a9fd2f335e1ed71. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1118726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98390fe62de0153ee6d44b6d8494974861d6f942825a186eea5f9153c6f6520f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1118727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9020de6e41164e4e45818a4dca8eea114c147e012c1b946b2b7bd7ed2f8a10d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUYG1118731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429f5145cdd3230ef5658fe64fbf07dbe2f288e5c67942cf1cb6a2b7b2ca01a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1118735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34888579000bee88e74f833ad9d1803fb695805fb790b90e9aa48e581b2f38f. 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/USUYG1118736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef3e601b71ad54ecc78b51e889e521fea26afe5cea2a24a0d90df21c2523c1d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:00:51Z), 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/USUYG1118734.
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 0xd1acfc66afaf40de19f0be798aa7b47f315029a4d64591e5f7e17fb89372532d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USUYG1118737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4672f8f13a462c0abd55694e2151c1382dd0f21f52da86f0399d485dad4ab4c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USUYG1118720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbbe8b67ab17a8feeb4d4cd5733fa333197ebcf8d8836fda11e9276ce0a5ec4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USUYG1118740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4269d8c0bb517310c66cdd1e79d7d8eb9cd30db75ee843ad38a07c076ddf73. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USUYG1118725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389578cda03e7d4ff9a363b5f4e1af8a3c3ac18aa7669c987b70a0a9c0c31b7e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USUYG1118728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08443c4a66d251297d9a5d3ebc17fcee7b4f1df6a12258e502905ef2fa93c7b0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USUYG1118729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcba0095200b1e9b78fc8b033c5d736a6db932ac69d262c3f41ae0d00133fce2. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USUYG1118730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739d3467a0451c8352d3902c3f3a30e6b9e1e6cd0b85fd344d9a634f26fda5e9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUYG1118732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b87b4a1e9895b55e1a0210198278bf1113d0706c06e07311c69424447adf5d2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USUYG1118733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1e4ae3b4965053033db112651c4093ea84d8b890f22d7e801b29ced498d8c5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAEQ2064793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79013e8117e04ebacf977c3ca810d6f07d659dbab6cc23caa4d7cf9d3d134004. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCAEQ2094467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc80d754d3dd40caf2203fbced0a99b8ff3cac3aeceb9ce5b42664ba82eef42. 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/TCAEC1914752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb9fb57688b3fd32bb045ccfa8f1bc45a1cf13f4d8f57d9a58801fac6b2b645. 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/TCAEI1993339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a99f6e617de13f4699867edf4301eb00f520fa3a6f61ad8390101506fc48c7. 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/TCAEI1993360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64556236b95df720c80b4abe38b606dd5ab6a6e2ad2090928b4be83191d99ffc. 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/TCAEM1999076.