Caspian can refer to: The Caspian Sea The Caspian Depression, surrounding the northern part of the Caspian Sea The Caspians, the ancient people living near the Caspian Sea The Caspian languages spoke
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 0x24a6977e988907ec5146012fefa7b059c3d679084921149145b630c03a5aabf1. 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/aed1300d-11a9-47dc-bd5c-4acde20113e2.json and https://artists.proofprofile.net/proofs/artist/aed1300d-11a9-47dc-bd5c-4acde20113e2.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 0xf6ce9229b3c6ebdee45ea528a2af5d861cb841dcdd3aea50eee34d8876ad6765. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFK2367743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f10015c1a4d17238d0262bf75d51a77c8b40a651024a13fc051537be8214518. 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/QZTB32341289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a9a33d07d8a4a6d08d4a39a170ec799ffd8f82c4c5799f195fd59265ab94cf. 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/QZPJ32298580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5095f25d189b5607263dad6676c95830a17b9620ff44a87e1d4b5d671b0f5d6c. 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/QZTB32341290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7813bb1a778e858635f0d8a6674a03ed3882e43ea28641d150837f01bb3b6d60. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZTB32341291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b3367c555ee457b1f455e76100f53ebc0846bed6b80c4fe7d907d21af7bd06. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB32341292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd8486b2f1a3e988eb6407b708d5d39b3fb0c2d400a5902fb93c20c896e51cf. 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/QZTB32341293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ff4e4a4daa58bdc0630f2856900dd53dd65e5e01e721691ce92f8ae0cedd4f. 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/QZTB32341294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a191727a316d40929a0e01d18faaaec64ec2b1c308bddbebcfd3c85e76b1f. 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/QZTB32341295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91446a50adb0e05d007fa073e89348201d0004bb0ab7b9a488e12f82a5415e4d. 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/QZTB32341296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d61ce6d8985d02cfdb1cbc8d2cfc4e04775110901290a0d99f55efde1ba922. 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/QZTB32341297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9498add2ed942ea19c118e88a80effc51a88865554e432771afc990ce532a154. 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/QZTB32341298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78339ce15f5964876ead485ce1d4b4248ae20b96d529d07cb922e6b099acc3f. 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/QZTB32341299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07db8a9dc279c484df436a5eb29670f8eb80c8b7f563398b66311826f8429bd. 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/QZTB32341300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34927952e2f1451df8fff889c9a29002581399e5e1bc5371819aac2bb66fa58c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTB32341301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f81bc6fc071f340893e80499aacf0a8643e725705d0b164990f953fcb16c7a0. 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/QZTB32341302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f4dd96d0000e5635a652ca8281d7e220becb90a075b40b9e293f1e0160a7f8. 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/QZPJ32235468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c8ae789d979535a75374292b6d56d450e6b4648ba44fa51bfeee4750ff4505. 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/QZPJ32129290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec178413b43ef70ce0402b3c6ca2aad4ba69d5acf75aa0de602431b897d031. 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/QZPJ32195564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6264ec9519f106a62937d76299f4aa26ac45ba5cdb75383381cfca74fc2dce21. 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/QZPJ32136123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66df7c2088f9779695450d729f8483ef80a44cfd47d9e1a93d3c3c390a3daa. 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/QZPJ32142551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6419a709374f7f5ee4949242d851d592412baaed37d7d8c0337036dc92fa8122. 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/QZPJ32239039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec178413b43ef70ce0402b3c6ca2aad4ba69d5acf75aa0de602431b897d031. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPJ32195564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6264ec9519f106a62937d76299f4aa26ac45ba5cdb75383381cfca74fc2dce21. 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/QZPJ32136123.