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 0x7d06ae6cd57c9de61ab9903e1a0b88969c8706345d1d2092a2de761103c30591. 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/ef7f12b6-df4c-4794-83f2-d022b1e23d59.json and https://artists.proofprofile.net/proofs/artist/ef7f12b6-df4c-4794-83f2-d022b1e23d59.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 0xed4bad2060a898b32616b48cddcd468759f2e859c7cac7e77b1bbfce986a59c0. 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/QZWFS2467612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0085f805dcd9b373901de50d6e3c0b1807c15430ab851f2a5740f4e31dc01f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZWFS2467628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2787574c271212fb058381fc110cb065661d5a27e9efc906eb43f865a4e3e506. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZWFS2468323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78355c7b1bdb8a090ad6d1ac4b5a349708e35fd53627ad4e53b05910371e8bc1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZWFS2468281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b31523fbee476b2f816cf279ebbc84b1d7af00ccd892898f331e79fd829e0c9. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZWFS2468282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92679b54e635ec52bb50f3f6f736e4b8342468885d95ee57a0a53d3fa5739be. 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/QZWFS2468283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be46910ebc38d9be44e3a54596b454c0d861df1ae344fb4b160eb2966c14cc2. 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/QZWFS2468284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e29b7d5a240c0d122b4fcab27220b55774b5018399e958b23b71d820c42a2c. 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/QZWFS2468286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae3b0b905bf91865463e7275ff9137ec24b08264a1cc994a8ba0f2db3f4a890. 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/QZWFS2468287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1db8be681d420be91436d067a28dc93c439e4208127b187089abed554ed720. 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/QZWFS2468288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa52265676b1131f613fb51537cfddcb3dde133ab82cdd6c250c2fe0c653714. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFS2468291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d05ccc184aa3ea51aed132310dffa5e03c5b5d9017fcaf60f195397c5e96d6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZWFS2468292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72025ed4e119430816e2c0d1332f39488fc18bffc32ae47fa2270460c3dc93b5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFS2468293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1373a36e7d5170ca8d0e79ca7a611945f68770787f5517d62d242c37ae5560. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZWFS2468294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7fac3f5bdba51deb93e1f5cd9e5542a42dabcd25379f2bdcbab9b703e50273. 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/QZWFS2468295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3341091d563b88c993df5db9532fe807e6cbb34dfe5170320cfe383cf667f46. 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/QZWFS2468296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76323d7c1d892fcdf46c3258cd40423432f77f1c87cc23cbb4e6d9a1477fce93. 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/QZWFS2468297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d4c6354094c5713b84651c0fad5e7659c5b193b40ad90b384bb43ea60a1936. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFS2468299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380b1c2697f3f2027b0f080dd025379422bd594b559ab98fd4ec5cc7061fe0ad. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZWFS2468303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80561225e66c38f240459d6a48eaccebaeaf55b4778c775815b7566888f5609a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFS2468305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4f96b1258f34606286a41aea048659ee2525db3966fdc4809144f77f50125. 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/QZWFS2468306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc0ea99fb27ce2e84e6a14ba2245d3f79c87cfd4fd2ab223e969c30468335c8. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWFS2468309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf74eccc9dc28d300c2df456241bd710d583c488f86533c0631ee658ff155fcb. 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/QZWFS2468310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb6d1b9e27a10b53e081089417fd05e72d93b50d1a48bffe87f3225e99b27eb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZWFS2468311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d8dcd38db986284ef5aa663f46c34706664d18ae25fee05479534b5be522d3. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZWFS2468312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d01ec17ea20f0332037c0aee8ebcfc4c268d9eea52fde3114fe73b3782c82. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFS2468313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc934f2ede630ef82933ccd17dbeb71bf8c885ca200202df88042e2dd36c540f7. 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/QZWFS2468314.