Espa is a village in Stange Municipality in Innlandet county, Norway. The village is located along the European route E6 highway near the southern part of the large lake Mjøsa, about southeast of the
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 0x0399455373768d6d77f6e7b9e0248055912fcb87a3f09cb6bf20165d0e20bc9d. 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/dd4355a1-eb6c-4348-8998-8e4809c9f49d.json and https://artists.proofprofile.net/proofs/artist/dd4355a1-eb6c-4348-8998-8e4809c9f49d.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 0x58c1ebfae9a276f1167c01905b3eb09ef16a9b97ab0b73d267b2c094963b7c80. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:30:21Z), 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/GBKPL1663086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9404225520eafa75add5893b507032440a0760187ed2c98dd9b12c26ba1815b6. 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/TCADX1822665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332f9dda7ae051e1c439c31db7f22104472cc66c15f917e16ee9b52b18757deb. 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/TCADP1800344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682be42603163f7dc737bf0a1a6c8f7369a46d1811c2e19d2bb38a7511ee3ed6. 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/TCADM1805921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca75c86cfc7f783dcae338fa7ebd9e2d04789ec92e2c81cd02c2c39da6f8732b. 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/TCADH1768433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b7bfae3c4a83c24b664baf90b669f3acda11e6b4036c437710c5e367f85589. 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/TCADX1869801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121abb8701629942b885c5774c873ec7b01ba669770664365f74514dcf92168e. 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/TCADW1857995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d21cc285dbbf3740902fff4a968ad91854e8625756e5a353906cde142e21c5d. 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/TCADH1768439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254652b11fda221659c9523167af6e0f928f4e6ca2effb028bcea79046206802. 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/TCADO1818916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc3be7ab3167b1d2564201e7331a492cdf3997fe873cee91aa86cd0288fd755. 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/TCADZ1884264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c426713a04a9a100aba477a842869d23ba5990d0128542511d6e79234e3617e. 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/TCADO1824012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5406747fc7ac61f1fe16b7d1eb8057736ee8dc42ad33947959c5fa3fbf83038f. 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/TCADH1768431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5556c2189ef606134b321b53ff7dd172eeb98ba12a4a6235caa2a6dc5fd71790. 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/TCAES2033458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e373e149750fff94bb25b055c1874e297cc321eb16961f38c3cf713b6bc147. 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/TCADW1882189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd9ce0acf6539b80dbd97f8437959f19b8d20886a74cb12742c9aff5296bdc4. 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/TCAEN1904284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25312dbe91a7a37fb7f6e28b23a359790ca71f0008d2f5fe0b790cee9e0262f8. 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/TCADM1891420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eaab46f2c593f655148a82f67e84eec263cce22b9737b954f5b2fd5ad4f482. 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/TCADJ1789824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a8fc3a3ba8f186e7d23e3fffa826998ce196436a58fe60ca8fa40b86e89728. 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/TCADM1805918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417683b096ec063ef73f8b477c13db6bc50cb0a02887580835a082e55ffe85c6. 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/TCADL1848380.
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