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 0xbbb933406395f85b72a869adcf89cf6406bed86f10fddd90eccbcf24e5db59e9. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7fa6f73-409f-4caf-96da-6cd97743c869.json and https://artists.proofprofile.net/proofs/artist/f7fa6f73-409f-4caf-96da-6cd97743c869.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 0xa6ec4033bbb5a54343a4201bbd0fc5b1284bd4438c5e43d112f4caf367d168fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ72020288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4007837ec816180a3c502166d690dfac5bc98f046cc1bbbbcfaaa5004e50f78. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZFZ72020292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f5f80743614d1ce76247ae6ca15f87247eb02453e1ef2c2a06b7278d006442. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ72020293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c306020b27e0b8e29e988057fb53b126ee480cce9f610f9fc4cf70a789182. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZFZ72020289.
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 0x86c23ccb17b86df3110ea1f3df967b6292b4f3a33b7d3f3664e208a9a4655ff1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZFZ72020290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d3253791800af48d77c4c1c0cacbf316d2cebedaf76f44d2b30364184e49cf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZFZ72020291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dd61d0f30a00c4e9038a0533e251223fb65a0a6a3ecb3208b970c8ff4500f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SKA012200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bc7d2ac915103873a1e87cb4d62c686108204334e83b8d835d99be99b6c4bc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SKA012200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f28a48458f24471daca2613f1abcfbd883d9fedf8f65f1fe67001339ee13896. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SKA012200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f39eb9f7e2ad47c7806ebf3fa677581ccc0b7e6541af248f098ab70469374e9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SKA012200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a0b7b52be5e4eb6331f9dac2f167ddedf5cf15cf4c9b11e0ef07a198dd7f07. 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/SKA012200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da32bcf5b6a4c660ac5fbb0d6e1e9938670513dd0d1d7cde2aef27a6980d78a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SKA012200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1475ffb4b8b924e7723d962116b7e78f733548a9a0973ae099122cab8249348e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SKA012200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42a2b5bcfea93cc058d8d51c7fe85c5839b52a5ffc98873882865b0b8b9cb40. 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/CZUM72400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e66496705a1c269a864e4ffd93e4b2b1c663674ae99f9a25496203d3560a917. 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/CZUM72400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1de704a59e7e8fb04cac2436d9c958919d420b50960b5108698d7f879ccabcd. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CZUM72400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e7f88329c8d88456a43d54aa0b6ff15a601b8900fb8b4bfce0fe941d3e927a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CZUM72400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78132140a1d8f61e8f0e1e62e401f05d89617c516459742f36f21d52124fce1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CZUM72400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d5744f60bd4d34962de4374ba2fcddb142fcd1aa8eb8ecd945611aa1bde89f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CZUM72400159.
Raz potom slnko vyjde (Acoustic Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09526046ec8d0eee5a6289fc3eeb2d093fe744f5932f7e0b7d837aa109ac765. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:44:24Z), 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/QZFZ22171847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acaed797c7b3086cc2556625adcd9c14b9cfc4d38041a7b15f782ba22c8d400. 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/SKA012300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efd83599fff7d0c91d94c4ae525dbe98300e13e61daa27a157d90e5932323b5. 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/SKA012300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a934faf7b5ae0da1cc4b5e968098ef38e1788eec32a5ec5682b1f2ce52d9c77. 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/QZFZ62042474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8128e409ab5379c2b315403ae6e800eaf6968ea2f116f9d03f72f1389d076b. 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/QZFZ32237332.