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 0xd114d1ab0e638fb9e2360150d5bf436cdcd082a7651a0ca139c3f2d6c479eed8. 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/80834226-6e7b-4830-8760-549401580d85.json and https://artists.proofprofile.net/proofs/artist/80834226-6e7b-4830-8760-549401580d85.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 0x9159fe2a56d26705f7d7228073b743b481efa2b28d140ef15538cb46c180714b. 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/USJE71710051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fdb3e2194efa12ec069f08e597893b2109225b6c6dbb38db0042341f48aa13. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USZPA0900440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daffab3edc6b4e5caabea705d6575a87b9f25cc602135485d29ce6526d044a1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USZPA0900441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9353acc1558bf838b1247b4af896bac449cbe4b274c6dd3942b5f4f0872a65. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USZPA0900442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e6603ace7ff34b96a4b5dddf909d4c0baaa92e9194c5b3be932cbf7fecb583. 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/USZPA0900444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbe0a9db75e28430ff0bb3fc53d81412e6390625f6c387f98640cec0b147b59. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USZPA0900445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a6ce98d0ef4c7e1435521c45bd45735ee36df98aa39f551f4cd088b42582c0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USZPA0900447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24217e5763bb26d9f49af912bd76df80c316120e3dda73e3adff2a34a4847dab. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USZPA0900448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8885fa2ec8ce49096db100ef5a136620b6917b3dbb87b32a6bcf190594cb11. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USZPA0900810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d467cc4120c36d4c91e32ca177ebe5387f73c087b0d231dd6ba6ff67f7b7a1b. 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/USJE71710052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c067fb7e3d17ea75aaf607ac0b62806a46f9e2c63e53c6114670e729fa50c5. 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/USJE71710053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90882c21b0e3de101edccc3aa51eb306339cf15481f6894bc808b2ef8632b6ed. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGH2544037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70d14f5760efc1d2adb4baf65d6e10e6bc78144c6a3b442c66df96e54248fa5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USCGH2567555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0cd7113f03199cf8a423abbf00261487417549eceb6a543141cd44054501b8. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USCGH2567556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bf86779e41fd2b570090a700607f137752228b5ebfb378389d77ebafe7be5f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USCGH2567559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d7c9fb5967803bdb7816088555199dac2fd5f692c89cfbc16ee20222206a5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ2522547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2845878602426ad14c01896283aaa464235e560e7ee223523c87b036a199e45e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGJ2522548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83da1e6215fcc81f87fa8226a8e2a077adb96110cf05cffaa7ad51e958c6cd9c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ2522549.