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 0x44d4bc2503e0dbda54fa09c12eac4d0bb0cab9199258f4eddf4219a72d7904fa. 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/5e8953c6-4f2f-4349-9bd8-4537b1e0a3a6.json and https://artists.proofprofile.net/proofs/artist/5e8953c6-4f2f-4349-9bd8-4537b1e0a3a6.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 0xfe837bc22b137b502d3196106ec5a5ea012a3d6c429d84e4ad58f4d49198f427. 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/ES94G2437003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a6939071494d3983476484ff843d5bc79caf6ed63a2fb676a107320108586b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES94G2437004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735dc50eeff93fbd7772c4b628e7cb2ca0dfb40d50ae43160759bb65572759fd. 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/GBLV62323355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8041333c715f9a969a5b467d47cb15bec8b86cf3d0ce6656760d162bfe44a551. 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/GBLV62323356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab70d55ec92c0d57255bc1bffa745784b1e110596365a4e7c54388750bee4dfa. 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/GBLV62323357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eb304d2c9314edb845b593a6665f2582a6a777f3519b34d131caa17b481884. 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/GBKQU2386428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1404cbd259e728ef1b2cf798abacc611bd404c33b1e52e5d1467249143432994. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBKQU2386429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4573801d6d4a6c4b7c2aac856133b7bdc2da38726ab8de9b77b9c88757f37983. 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/GBKQU2342425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09863cc678c5c6e7a6c6d0a3650d13d7cc163a737474505a134f3023ee829a2e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBKQU2342426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23af5ccd58b4e03d31c52f44f3bb78139bd09263c7fb1dc4b708d1013935917c. 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/GBKQU2342427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916614559c065147de86dab0f7c12a0a7c28ed34d5d9ec3b1aab5767d48190bb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBKQU2327957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2324dab4f30ba4e6933c31321ccaaf82d0e8415d46d0884155d40b6829ae1a14. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/GBKQU2327958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad6cf5c7fb4dc6a7d06ca143d1995fa9144c99aa3eb8838dc39cb78ba1f789b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBLV62217248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cecedcd31a7a5e99f3e4d2e9bdc4bf477c05c929cecbc7a112ebfcc00b3a69c. 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/GBLV62217249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf701b83b84078a4d51bb9af6a4134a4caa52c25ae0cae93573a93ffcd5fd51ba. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBLV62214678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2908bd28d9740483f457b920b1bbe3e6e08e51043dfd91bb3d6553f393faf15. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62214679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f1e33d03c102595ec1d1102f2b0aba631c7f386182597586ce1dcde238839b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLV62214680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e259bb02efcd22975da5826c999259a724d51dc900cdd831a6d5b0f28c74c61. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBKQU2273495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ec8239bab2b4dd8c176e48e131cd8a4feb9fc021efafcb32191ee348b58af. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ITI952200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecc23824790f81927b4758f80f03e3ccc40e8ec89b5cbccdcde0021079202d6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU2270390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5092e0c348f44458e26393e1918e4eecabbdd49274a9c1b128925aad232f656e. 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/ITI952200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5125d19ec69d0bd5bb4dea4455691ef6be70608b3786d85fb536520a5772c15a. 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/GBKQU2258005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b201181f696ba6468688d713c3663ebd3a3fa571cd9189af2d349c4e17b2cc0. 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/GBKQU2258006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe358c710167078d0fa1c3cd1ecf8bff9aa2a1d32833861bcd97e448ceca0bb18. 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/GBKQU2258007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546b4a6baf2945498f3629fc216fd094bef05976f90c7d1e39d422cda5154236. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CA5KR2242638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfab2a38d0339c88e83740038d943ede77fa118d29de6c36e12cc78d979b0c77. 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/CA5KR2242639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54a63d132a6813df850cbfdc438f3a7b08712e1a6277464e51f75935d02c57c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CA5KR2242640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe783a9350f2b72d9c79b36062ba9c7cfe903f95bf7fdb95ef642d3effc0b3fdb. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEH742208408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d824af9d33adb776295247f06314477cce4ff76d3984a26add22555f6de6bc. 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/DEH742208409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ca42195f9295f9a868526e35b10924a86f9104b79caab20bf33778fb4413ab. 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/CA5KR2215434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbcae6b46fbeca9dbc6674dab7826e923893238ef4cea7f0720675c96fd9535. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CA5KR2215436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4263555a0427746269f42d99a75d8acb4df0a5c7c3f79314ffaba18deb1e1e. 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/CA5KR2215437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa824fd4f6350ae7e75a69de94e91e930aae77ea9be7245ef13b1502274df5d1d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ITA061302089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0fec97286ddf13cf92aa48d48993bd8275cfd3d7ab5497182aa1a061005069. 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/ITA061302090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b6747fb6eccdc31fba54e18d889f229bc00e98c4f2e8bb7b9240a9abd14397. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR2192248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50048c5d2334b69629d8dbb148453b689d55df59fbdb121c633d98bc45c60adf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA5KR2192249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e114f906cd2ecb0dc8a6b0098fb37746dbbf6c3515e4bae03dc1b57ed4f3a2. 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/CA5KR2192250.