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 0xb1c41dbfd991264220788242e2f072ae891d8fafba65c4196909bca298b4180f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81138d67-832d-450d-9429-4f0b472971ff.json and https://artists.proofprofile.net/proofs/artist/81138d67-832d-450d-9429-4f0b472971ff.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 0xf125d4b4246c526a6379fd5c366df41ddf301c51934efa0eb188742f306cd26b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLH511200766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf125d4b4246c526a6379fd5c366df41ddf301c51934efa0eb188742f306cd26b. 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/PLH511200766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e6cb1d2c83df94d8a3f9dc6e46ba73c52a6a528733a9431e438ee49e5af62d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC062407934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe6d7fa4294c1c0c6445403011911aa7ed756d01b7533d9f3b8a28a6b72271e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC062407942.
Ja tam cisnę na turystę (feat. DJ Shoodee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bcb0c5a06ad74c925ae93944979f066976ec67d5aadbc6bf3bd6ecd45f22a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF241906495.
Reality (feat. Havoc Mobb Mobb Deep, Big Noyd, DJ Shoodee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bcb578e0fb264f18756b21d72d5a2b1c599a738d838671e0e852c100a88e91. 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/PLF241906626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50a6ac857029df44773bff81e32ac243cdf6987b1030d10b00a046e30ec54c6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PLC062385139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f2ffe58efa3f01b3ffc8800cae3ed9a08a2e6ed4ae9feec15ac5b668042d55. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLC062385141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfcdee8daa65c3f85d38e9556efb527fb252f813a3604bd13579d4158f221ed. 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/PLB382000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35c45a8a60441af8ceb0ac375083c38ae6831784b347a8a4d9599d0ef13e397. 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/PLB382000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef533b69df258822b9e596c055cb4da0089ba4428c807d67ad6729afdcb727a. 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/PLB382000151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfcdee8daa65c3f85d38e9556efb527fb252f813a3604bd13579d4158f221ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB382000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8805d2cb8af27a9e9896fb9f49a88963764d092d0baa3ea20f028e8fb83807b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLB382000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35c45a8a60441af8ceb0ac375083c38ae6831784b347a8a4d9599d0ef13e397. 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/PLB382000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4057c72bd42b161d390c9be57bca3f076833a2ff1e97e106e33df52721539fe. 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/PLC062397161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968d53363d87623308dd363bab399f6ddd97169e5cface9e084a320c0d3b7e22. 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/PLC062397162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b96552a75a22de0aff83deaa205ca456d560e348892e0bcc35928636130517. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:58:50Z), 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/PLC062385138.
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 0xde8dc1648284c21f8c33dec4cd138a7f516609fa9842aa741f6b5b2464a76eda. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/PLT612010001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7097e58feeb9305022729a8512e0ee6e2501fe334e227cc20fd8b963b470b49a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/PLC062397144.