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 0xd51e46af82128be8bc5b694cd6ebad359bc7e0b8b0fdfcec3e7f806fbabd06de. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bacaf26-18eb-406f-a6cb-1b85eeccf5f4.json and https://artists.proofprofile.net/proofs/artist/4bacaf26-18eb-406f-a6cb-1b85eeccf5f4.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 0xe01c614d1a2908828bb51a65b1b9b9a18608d753ef31d3d61c6e94051ec2b414. 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/DEHC81200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3fb4a07e5ca4881f3e86bb9dd085bb33789f24fdfb8614183e54879c516edc. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEHC81200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ce5ee7fe739a04852be12666354a4bf0e041f2aedf70bf1840319d4eeacb65. 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/DEHC81200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cbc8982493aadc63d491e241a484be59ac37cdc48150ea33f3916417bb9f9d. 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/DEHC81200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8629d3881660d6f351515a188ebf1c2584107946f7941c0bc292a7bde9553543. 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/DEHC81200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdf0977d795cc53895eb4edf746ee777f8b9c20c65d57ed46c74b36488cd38c. 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/DEHC81200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85c82b2366c57a7fc2e25cbc874788bff4148428d6f120f82ba3f9ceb863f34. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEHC81200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8c8b350a22dbbaaa97503e4e46b591306ca212d71d40ab2fdcdc367b8ec8dd. 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/DEHC81200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ec76da21b8ae794be749bd35049229ec2d92ebe66c8d769997305984dec00e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEHC81200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e385a8f5e9810b5d6062bc26fdbd4ca2dd22787da4085ee7e0445ebeec298fe. 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/DEHC81200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f765da82040d33a8ccaaca3ecd6489500c1d7b69c003859adbc798209b3ec5. 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/DEHC81200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334eca126bf999e1fc5812044fead699f58807fa47a8e0e8f9a05adb0bf8d09c. 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/DEHC81200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644a71cf33d6940d4d00e02db65910a78453dbc61771e77b92e03bdb6387eb15. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEHC81200316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc235c992bf643dc1f0ee7631eb7bd3b386c807a44a66709f0d387fccc03d8d. 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/DEHC81200317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc5a7dcddfc7df93a21f03906f34714c5087890e7a93801d76e7c571e0a448d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEHC81200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4359647b4fea3b8188495a2365ae470fd1aba8d3afe01f4bc38f61b9699edd3b. 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/DEHC81200319.
Tanz im Kopf - Chaotic Rave System Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f2064940e46925bc1219f52539ec7467be008fce3b97456b26430bc790d67. 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/DEHC81200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0e15cbc9a41b4d0e9a05d60bb081b927ac334712fb3f4c6b2afae93d563fe0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEHC81200321.