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 0x26b8c6e5ec42a22ed8bbdaa832785ad3a2df890715805bfe7a45078c5b5d54b3. 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/a90df858-68a2-403c-af01-0b46153aa35f.json and https://artists.proofprofile.net/proofs/artist/a90df858-68a2-403c-af01-0b46153aa35f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Svoboda: Originální Nahrávky '65 (Výběr)
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 0xeb8f7d35dedfea321c41b998ab3e6156b259da73fc9ee28a6381f465445d1b0d. 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/CZA168500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8f7d35dedfea321c41b998ab3e6156b259da73fc9ee28a6381f465445d1b0d. 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/CZA168500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d34af3a44af42876c2c84f0c2d9807bd63a03ecc159010581730ccc925050c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CZA168500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbcb06aa2fa9e19eb963a1631432f02ae3607a99069a2b0162b6d2bc517f2bd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZA168500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2324edbb0866ff5257fde5a90849f8b8dca3e6fcb022c81b773a238b8d1f30df. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CZA168500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefbbe23fc9477df16e356ab94325860100cf3cacd52a99ce2c2accc5e8d816f. 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/CZA161100893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717a448e603329422ffe76f7f08434da23d2e727d6194ab041314419d66b6b9b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CZA161204240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7844b3e8a92e54b2bd40a3ccf0059710376c16e282b8e464d27364defaba8. 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/CZA168400657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8de0ed20b7edf6b3bcc8431ce6784fb0981ffa142fa81c609dea30b64896cb. 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/CZA168500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7844b3e8a92e54b2bd40a3ccf0059710376c16e282b8e464d27364defaba8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZA168400657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1789c4c2c70d19feddca85720dd19eb3560e9631d5009bd61146c9a4ea782d93. 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/CZA168400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8de0ed20b7edf6b3bcc8431ce6784fb0981ffa142fa81c609dea30b64896cb. 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/CZA168500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c694a0b1d604c6ecfbe3a600e2006b41a716a71df0285108d1f4886bf3a1569. 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/CZA168500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c0f3dcbd2515ecb4b6e947d48554e60e92b49ffab3177bfe62769fac78661f. 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/CZA161101207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cee17c944dc47a1e4551d8fc78b781602140613464216be7cfeda34b2531e5. 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/CZA168500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f9bc853268a698e83a6bbb390dfaba86b168e5708a6bbd463a50de586d8137. 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/CZA168500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f1cac29c0c59f6a32005c3cf4de22fbfa40b1f39cb8fae4854b9c1dddeeffd. 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/CZA168500140.