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 0xf5d25ef5a3525666bd5aa7bd72527f7228f9dff4411b497b5229290ed3fe61be. 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/a99cdf53-b8bd-496a-b60f-5fb2e26e9b2b.json and https://artists.proofprofile.net/proofs/artist/a99cdf53-b8bd-496a-b60f-5fb2e26e9b2b.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 0x9ced55fffe5b56a80b5c53563037887d417c5e8aa46edba9baaa06274366a259. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/HUA501300498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fcee33cd37c68f5da1ebf12a5d78366b80a69ba60f36c97769db22c3f72f5c. 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/HUA501300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b2088250dd3d3a2bff6c2948604a8717bf3e003283744b1c98121a62840d49. 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/HUA501300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b9615ff3e08c5a608ab86b5e7f3e0f5f7a648d78215ff84ebf87ee449289d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/HUA501300513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08891d90d3c8f30f710d652362fb420391157514021b3a80188c7f910ac38a2f. 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/HUA501500565.
A Trabantfejű Nő Utolsó Dala A Szerelemről
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a0bcf7933c4f37144ecfcb4547a02e4eac10d4c1669ca199e47260454e4f9a. 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/HUA501500566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a57f5ee1971f675b4c67263d9d53327864db419ee66f669e7a95f07e129c28. 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/HUA501500567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3def8e061930aa561e21abe2db9f54397a4ce15c0c2f19a82f22fe66b7db74. 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/HUA501500568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf867c3b7db803a72e427bd8d381650fb6ffd75fd91ab49d8a6d9e85867db7173. 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/HUA501500569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c97f7a7d738fa1211c3618b3bf66dbd2a3e59233da04c2a1fe60034946c521. 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/HUA501500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2495277d6b1c9fb1f766e042ef517b0056046809291672287762c205ff7f71. 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/HUA501500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84eea8ad6f0a3d785603eff2ea89549f9b5a32602462083efdbf8f8a25c20f4. 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/HUA501500572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56277ba79b25ff537e1ac6e2142f51a5e42f2ddc0c7410536ed9dfbe03817e9f. 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/HUA501500573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa8f63df0d7eb720f70e021a0aeab4050f38f23214758828443552b670a673. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/HUA501500574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7756a90bce5582d0ba43877675e26c6a3cfd80e82e55f0ffafb5be722aaa4ac. 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/HUA501500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf624878353216b7b633005a87dd0e21395b75ad8bba6d690497b1562a5ab7b25. 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/HUA501500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e59ab5a742f0b7c7bc7fcdd8e2cf31b4608a03f3e69f80a2a7cd967502ee37. 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/HUA501500577.
Van Egy Ország - Tűzoltózenekaros Verzió
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc9f43b727c15f4f639780bf0c10dc71a5596857d70a0b3be78a0d851e79146. 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/HUA501500578.