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 0x572ea672055540729df8c556b1aa9d055349bb4aae6d117aabb4e953cf608c94. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d4501fd-98e9-4787-8d24-abf5303e60a2.json and https://artists.proofprofile.net/proofs/artist/7d4501fd-98e9-4787-8d24-abf5303e60a2.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 0x5c2ea0b8d147c19175e9eaebd95a5e47a1198b0e6eedfbc81f225a24f8600bf9. 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/AUN4N2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1431f2be8c2dbe0b2ca14aace7f68b6d12548004f02f32981b45afb9d657273. 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/AUN4N2400001.
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 0xb859a9f88abe108601af5098b438bf1139f42222cff76435819c14223d204fe9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AUN4N2400002.
Improvisation in a drain - with Abby Sundborn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9228d26cc46037e22e9d3ab508401a85435ec70053dd8018280ff0af445ca3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/AUN4N2400003.
A fragrance of moss and chalk - with Emile Frankel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f651bbe837c09978d16c6f9b8c18b5c76820a677c586db8c6bedb3500eceaed. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AUN4N2400004.
Stairway to the interior - claire rousay Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9103acec1eaa0062cff7b6f4dd4fea4bcb288c15a8ae0f6a2688609358b9fd8a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/AUN4N2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce452b17d4aa57ffca89d0befbe3b2afb7a24ffbcfc119925a0ca5ae465fd892. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/AUN4N2400006.
Even the walls have a voice - with Martyna Basta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bc964f86689433e9dae42481ea757be1f690808dc5666f91571fefd0db63ac. 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/AUN4N2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9253771e3828fe4ebce40a00b292357b224a66884baf0a68636ff42f4482b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AUN4N2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb07a2dde19077148a0f875f70fc5e1e6bae0c771225bffe0386364d5a230649. 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/FR9W12355628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957ead37e669d0a5d8aeb6c491e1b19a00c94357d9f1718f1c1bc2ee02f3229b. 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/FR9W12355629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892ba32271281e3324201870071b83d9d204f4e6b67c72e846c1337a47f41b70. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FR9W12355626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6086598382ddbc7e444213cad33c3fe9f63219efb3f2dc8a1d4cc3c4a442a192. 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/FR9W12355627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86609a2bb77c289fec96aebb399a69010c9210f82d7f0db8f3557bb719d88e16. 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/FR9W12355630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc1b19becd6de2bb8c1c873007febfbff5d62fff4f9cf94e2e6b555a3cc71e2. 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/FR9W12355631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1aa8e5c3f1059a65632f269479a75e55152000158bd02ba904b51ec334182d. 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/DEX262000916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8d18dc0aaaa96277ab6d816f1fa6f4180cd288878d4429d9b9f880b63a4e22. 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/DEX262000918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1597a8c0172d768b09fee989a445cbf80ce43136166376bca10ede02d8e157df. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX262000919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ce76af2f6fc88f3e3ef5e5317a00535ae2fbd6f9b76688f64ddcb0c6aa1328. 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/DEX262000917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c18da832ada0a6be0c7f6c8dacddc04738636f69d270231021f50d276c7d5b2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEX262000920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69af7fb5960d7bc9d517d639163ba8bcb76d8a688d041596f604c03d84a8333b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEX262000921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b33ab2238cee872eccd22284dc9e32e52626142fa1d41d7054d8e7f00f4e9. 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/DEX262201627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe69794b5be1936fcd67abaa3f10f5b3c6b8ba5f4bb87647dd3db39b98bd13ce. 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/DEX262201628.