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 0xf14c2319b8a411e533aa9e710a428463f3f8185c3d104dd03a117151d82112c7. 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/235756dd-7e1a-4106-b412-96fc3b4c9db0.json and https://artists.proofprofile.net/proofs/artist/235756dd-7e1a-4106-b412-96fc3b4c9db0.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 0xb274905ffbc9e707520f59c5dda259f1ecb40d3f4ce23e272b62f13a96385f15. 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/ITXDW1600276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3de198838da8220fca7ab55b87e3955151f9e34b70abaaeafbba76063f7d75. 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/TCACZ1731691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f1ba242a3d98dc2005a74b6c1f9696ef95161985dd251d3ae7afbbec82f210. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADD1796845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6949a10ec500d1ae16dfde7edf97b8a62d5047c7ecd572f00c7c0b534e569ce8. 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/TCADN1824260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99a383931de39a12855b8005606b46c69f117c541b4959b2ed0554bffe949f4. 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/TCADR1898861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a20a7f81be64d540cf52f1c589e7839a6a5be6fa5dd5fa6951ac5f5a7e1e19. 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/TCADR1898933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0890659b7d294cf78aaa8e873efce79e497dacc98a41bf91b3ab090b2339134f. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBLV61925723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b1012e53869f6d5cfeb681fa0182c90b0bdc4bff1c2629c759c72c3ce21ecf. 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/GBLV61925724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661d291dd6f83cc96df0e86547900796892a54cdd2fb940f3e6ccab3c657c6c8. 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/GBLV61925725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24488b9cb4698385c4f5b732e1b1630df67d8fbee37d12f5884a20c35054867b. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBLV61925726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcd9b63224c9664f1a536648d263b857c88fd874e5b31b11a3d167338057f39. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLV61925727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4650590159ff369d6ada88007e15cb2cd6517ef03db0bd47d25050bae60df89e. 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/GBLV61925728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc297f28bd8a3ba6c713a17be9593322b57fb8f9795df185849e3357f7f5d30f. 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/GBSMU6746193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e15144d503e2d3547237546607389a82dc53e8d5e2a728271e36c75f9f3944e. 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/GBLV61925729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cae47f8bef6eb5b6354d029c748f1f09d779d407c65708a22f297d4d4de2300. 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/GBLV61925730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04570a802ebab1f88cac02864f39ad1fa33438d26d26f623e8de40c25ba5411. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU1997811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac367753096a5ee837c079187dfb3cd89db8e0a60eac48fb185644ce05d1f94. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBLV61925731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd41b8a961a75bcca1d0b0952cba96344c31810206a41a50cb4af40ada555af0. 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/GBLV61925732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c1d891cb3705a6fbf051ae3a146fde5e9bbb47bab0a879bc1a084ac9e7ac0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBLV61925733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9c1aef05993b18241ca427c8d08a3aa30d6acb7f7fe8583f1816e830714b54. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/UKV6V2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcac4d7290a1aeaa46de87f7095031f6a6e22770dbd94185c9018ef1855c86f8. 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/TCAGU2333317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd94dc0ea6f7696d265209a6198ab3315e7dbd33f3f27892d621a41e516e6531. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAGU2333337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab661a4be5399cc640b388b226b9c255bf4cd3d18d4869be9159e975503508. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAHH2379202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12683bcbb549dcf8c898b227f01bd9d39058587bcc0579e137db791ff3b8510d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIH2470111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d24a5ec4ae8b9f55f462ec3109d72d722c53c50a445f27d861f8b183c86b68. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAJF2527360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f99f137e63e5dbbf4ab6357bd9897f4e80fab2462a8a4506c6c359cd639be68. 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/TCAJF2527447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cad68ae20b81a396668aaa163d0a725f568d7d9d03f856302301c2039146f1f. 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/TCAJF2527472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf912f3b4bc51da06253b65633ee5f418798f2a95d5f848d2cd2cf79eab2cbab. 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/TCAEU2060951.
In Search of Darkness (Original Documentary Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088b1db3828e8039b7a721437a5d2a54f615960e2d72290317001070c6ddc6a4. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TCAEK1926308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea4f52933ceeaaa6f509c75aeca695c02ce05601a3160b75de4cce2bea78822. 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/TCAEK1926319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a20a7f81be64d540cf52f1c589e7839a6a5be6fa5dd5fa6951ac5f5a7e1e19. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCADR1898933.