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 0xcb23bf314f338b36027840a4dafdd644b2d300761b673f940d1c6ac3f68d6262. 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/813d432d-4462-4c68-b0a6-3a4f6c2d1e92.json and https://artists.proofprofile.net/proofs/artist/813d432d-4462-4c68-b0a6-3a4f6c2d1e92.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 0xaebc34ceda0d8831f1af23707ee7eee8ff027f63ed2eb84262d6b3e5ea62b303. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR96X2272447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc47b4251c4b95433fee8c49058da18e011ee2ab1a2354cb7d441818431bdac9. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/RUA1D2160954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342c9234795702fdb610a7ef4d8eb2540843c3f0eea5d0213ff6625bf9255669. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR96X2272499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26a54c51aeae3042060daaa779228e31590f79a4791fc5de987249715064121. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USDY41946529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe354f6d764ba6dd39d103a8a3276c7aba0d3643ca02ed2181381e56d41c552e1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USDY41946530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2979ec3b90c43377e6981a184ecc5ced22d4603efd32665634619dd1a35597de. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USDY41946532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9427f77e923dfd81ea7d13c700bc6bf99685b50adc9e5ccbf30623e2d44bd839. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41946533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4174d9c6411d41dd10b992d6010f61a644a8b03737697bf4ba1317d7173718e4. 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/USDY41946544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5c61947e043cc312bb83e5c9d0670866f7d2164be033065f03bf9a0dabb0fe. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/USDY41946545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4b8cd1017746f88bde287841f926dddd99690beb12129f83bb0ced62de791d. 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/DGA0Q2391424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc3e2cbee514b3a42bd36ddcddbda3cab8a27e4193bcc50985e4f3f83152b9e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D2123373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556b23290e6c43ca3364d48f789983c94849648009bab7d2c9ecefb97f48daf1. 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/USHM81931446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2be9da4eb3c272cfd9a838afe6bf4d0bc85a16a84215ca973f97ada7d1db70. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/RUA1D2118614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fd4af839bc219a406ef2914bda98cec481a854dd067768e1c358d067963e9c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DGA072149483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb40af3e9afa5c7180477d3420ac6be00b0d236485547c00f07650cdf15c3cf9. 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/RUA1D2114223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d8257812574f95b8b30eceb2ad4bd278b8d18358351263f9c31e91d19715e0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/RUA1D2113916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a823e9c645dc34d423fa0ebf5401a05293ff9cfb5982d6acdd6c78c5ad75cc. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/RUA1D2144002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3c16a089d52334504440dfda9e6db349ef56a256a7e46317106b9a9990cf89. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/RUA1D2201830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d084403373aacf7416354df75d95ccf891e702503b910355122b77ea64674df. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/RUA1D2135361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf0b53e4e81751556b9fa4e844bdc839025d7485ba799de33874fe9e38f18ac. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/RUA1D2158133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8d6747bee631ade0a433202ce0ecd16200e26abe87930659b6e0426567c37d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUA1D2127776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441749afa34ef122714ac59d77e5e1b8ef69098fbd6c98d30263b0e8b02b0740. 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/RUA1D2145671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e32ea174beb69107a6b6b2c62d7487b28413587d03b3898525713515ba3b283. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA092204196.