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 0xb504a57f6b7c64bcc61676c73632d32c888b4751c1165ff8ed166ce616769c0b. 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/eab7c291-7013-4d2e-95b1-0a8709dcc364.json and https://artists.proofprofile.net/proofs/artist/eab7c291-7013-4d2e-95b1-0a8709dcc364.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 0x3b09622f785d133f193344ed866f66308591ed8ca1fc3ca2f9fde0b1027143d5. 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/SID051700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7945c07439e4d32989ea36a99e089a2fddad35d73710bec7140a4aaa1832f35e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SID051800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36829a6a05691f82549b28b65e34ed7bfb755d935cd0b9a8a19481a8fb80a24. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SID051800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620a55f243db6ea16666b41d0627982f2f7de7370484c4af12372c23976e2bd2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA81995746.
Spet je cajt da (feat. EZRA, Drill & Ghet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf881e50e14253cc8472fa517167a8f072f6a6d04b39fcc751b862207ac8bfcd. 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/SIC032100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a4da78b6b7ae9ff498439781827c6a5b1ebe73e43707a484b2e135199a3c8. 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/SIC032100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c7558149db969830095efe292cadff425212f812de102b3a75d6e04dc6db93. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SIC032200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9419a833d85465ca1447f1d2a8d1e97c0c1ef7218d241196d19392ca83a0a7c2. 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/SIC032200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1018b89ea6d1278a2bf830983d0917fcce4b35fb14b09531275b67cdabb3be25. 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/SIC032200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aa7a1976af73c1deca682545a1830a648f9e7b3de24ae1eedbdf057c360c55. 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/SIC032100152.
Ulet u moj templ (feat. Jović, Ezra, Skova, Shorti & Trkaj)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1332ada298c78ad71fa3ef06f997c5423a27d6718400db095618dacb35e8279. 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/SIC032200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881f9bfb9753610754fcce3184c67defebd6bfdd57ea3101e36ce83df706904d. 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/SIC032200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549e2223537a11ea22430242a9cd105419701b88803b3f880a7a127d2bc1300c. 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/SIC032200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd33869831c7f6feceb6c3103e810001e6da5161b86d2dc36e9f0a4ac701799e. 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/SIC032200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5771c459ac192f671cf9e0190b48e78e54e841e6c1e57caa03a7d0c6748ac226. 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/SIC032200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec8f49283cf78405d25e84bc49eeec2b5769943dcf99c0bfda42dd1190efba3. 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/SIC032400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1026d5780a307af16a0a52ba6d03c54554c539b800f2b7c70fbbd723c6a1352. 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/SIC032400582.