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 0xc3b043259ef9157ad6908f725c1d862bd309897d739adde6d2c75d511e2541a2. 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/b79c5ad8-909e-45fa-b28a-f80b26068b83.json and https://artists.proofprofile.net/proofs/artist/b79c5ad8-909e-45fa-b28a-f80b26068b83.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 0x18471d587512d158d459cf69bcf3aca335ae27f498990218d7456b02568695ea. 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/QM4TX2322287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650c6214615379df9b5ece25c405502efa289f1f401b706c08dd6186de5d5ab5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TX2322288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d5c9cdfbb4eef55ba152a78992e3386fe9e38e40047a8187f6c933b45509b3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TX2322289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3129ebea65aaef4e51a4c6566674457f8f53f771e859274d70b7d6b33363822. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM4TX2322290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a11d19794d274009aa5c131b64374661726b707c66cf16e3cc1a91611321d6. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM4TX2322291.
Helvete Kjenner Alt, Selv Naar Taaken Har Lagt Seg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef82de54a260234fa66b4cd1c7dd6b3405e778431ffd6f5f375a27fe0dd131f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QM4TX2322292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a840548ce31c1b407790ac020d01b6e53d1a8f9f582ea9e1f91ff5ee7b797d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM4TX2322293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7a2d8c36683edcee28eaa767b45b7252f63c2b84052928c552460778a15b56. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4TX2322294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81285669c9ed75e2ae3f1667adf206f21edb8a667fb2fb52f2677bafc152de9. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM4TX2322295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa138828e01f52f24f537f259fca40a9a94e48aab790a80ec0ba88800dffbaa94. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QM4TX2322296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140d1e51b67d34347681a60bc21fc1f58f42860fed1f590184687d95eb16bde2. 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/FR4E62100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3990e0a416dd24dcee68abaa53fc82bb41a1ed1ed6fc00b662a1209df8dd1d8. 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/FR4E62100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4f1ffb998a7974321f187b5ab6cf7b9fa9798fec7bd0a871bf8d93adbafa09. 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/FR4E62100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9783e3e5e912a9a9cf2f34fa3fe0746f050c0aade61f7a4e1bbee57cefe290. 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/FR4E62100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5170bdcb1d76ab64b9c5877434799169e6df076425995c1a16c344193977f4f7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR4E62100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524349188e8d2c0a3bb0e1266832c96351ae5855ba6fcb55cf3115b0585973f7. 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/FR4E62100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edbbe6950d37d1c5892a0b3362d1796ef5d76d9f213c1a574772c2992f9d0e8. 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/FR4E62100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19ad74408cd4a01528e6249fe65fdf53c81452c4212f7ad856613c8a92664f7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR4E62100170.
Slakt Dem, Der De Loeper Hodeloese Rundt Baalet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9a8468384821cccc2d522b509f3b0dfb9a67980a14596cd1806d92843579e1. 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/FR4E61900980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169e0aa0f77d455ac9dda5114f44ecc2944239cab8905b69565db205119c87a2. 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/FR4E61900990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3409b895703298e36f310c160b6d28c09266dbe55fedb6b825c6f9ec02d294f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR4E61901000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc3742d29ef275c9dede76e52a13e204765717c1ecd992016484044ad996668. 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/FR4E61901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28e17821bc8ba9cee6cb5aadf16a2b45ed82f8db36407b3aadad0f6651cc681. 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/FR4E61901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839fce65994ce79601f9de2dc7c55d13125753a0fb2e580702ba23bd2c44b699. 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/FR4E61901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d4a6e30b9142c4745121c3070a7412ba719ec7eb61b49162b3edc0cfd7bbac. 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/FR4E61901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46814d2bc63adaee2642b8b391aa7a9f22e168543c761feeeaa61bffe0e9a760. 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/TCAED1931521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd85ae431ada2f398d4252e9919273cb51df5d58d2eb280850251e33d1a8737. 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/TCAED1931523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf43e4919b4c87ab159d05f02d496d4152b027bbce6332460b1abfe2bffcac2. 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/TCAED1931524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4392fb696d460034240bbe39167f33a05dd1c7a3ddea3796572f36ba17ed760. 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/TCAED1931525.
Der Tronen Blender, Vender Vis Oss Mot Mørket
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41bc81b36d4864acf5f64946e34ea7e0bbe0afab35d01a0a47c809724bfcb7f. 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/TCADH1714716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b2f7ca02b712c2129b3134926920d2ba517cb9aaa598b3c3ee2b22971b959f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCADH1714718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b2a50899dae08a5703a12f1fa01825e43c49344ef2b6d08afaac6c443dcc4e. 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/TCADH1714719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc49592982f399cc348f6d31257682ef25b76fa7402c46d684ac64d339e752a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCADH1714732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89591800d4fdfd6cbdbcb779050f4696762812676ecee881c9340d55a85c25db. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCADH1714736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f606e1fdb0a734e1256eb4ce9ee666325aea99e88c3520772ad1b2804cf07e2. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCADH1714740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf461a9d22315d33dcc70929a54a04df01b9491b6bb08d5d88b0fdceccdce9cab. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCADH1714744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea26e579ffdfc02d2aae4017a089dc2e6de5028e1198d5e3654262d721edd41f. 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/TCADH1714745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4f1ffb998a7974321f187b5ab6cf7b9fa9798fec7bd0a871bf8d93adbafa09. 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/FR4E62100120.