Constantin is an Aromanian, Megleno-Romanian and Romanian male given name. It can also be a surname. For a list of notable people called Constantin, see Constantine (name). See also Constantine (n
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 0xcf23d9a5b666bb28e99e41ad09ad8af40cf21f0b7b291bcd8b5f9f3cf3836201. 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/92fa20fa-9588-4151-91f2-80871252219e.json and https://artists.proofprofile.net/proofs/artist/92fa20fa-9588-4151-91f2-80871252219e.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 0x6e31f9717c8a0da442ae3e6bc90856c74795d5e3178821cb3c522014b63aa33c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ROCMA2413450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b296701e5df25df1d67c945b3016179cb3285349b99e0767f9cfaf9cebf824. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ROCMA2413451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb71d8b6a0466dac854594c28767c4bc4928983734a80c4f6311cd0fcc06cf64. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ROCMA2413452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d3401347c4cd91752efbda3d254c629733df8f49cc824aa725e049ffafb8e6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ROCMA2413454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f966aed8c2e8fb9425ab9496acb1c33284a8ec19c75922fc9f017f8860331d9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ROCMA2413496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d05671ba2bc76e267605e38bf3cac6908a734b7373498aaba4b9a6e4a41737. 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/ROCMA2413499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26200dc70220c7f609379c424337fbfc76c450647af1cb91a22218ead5ba7ab4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ROCMA2413500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33ece433c930c080b1fc3ea44d1c1d600d6e999c48ecd98be3d81560145f356. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ROCMA2413518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ab24c994b4714933896858b391bc0f590ea4a7e9ea90ecfdcf7991fc65f1a7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ROCMA2413578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f71466a2b4859e14482748f6aa43b32d27ea44cafbe4d135a18934815ad89c1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ROCMA2413564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e61b1ad1cff7fff366ef2489becdd4cba5621f6f72e0ce504778dca9f386a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ROCMA2513605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938a78bb5efcedbe1a68d88c03b1044cc045f7e2ef563b94236a2efeefaf4a70. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ROCMA2513639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b671e1c50f074f12b2a5570b943e41a08cdbce792bbfa60b8bd96fdeabe25b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ROCMA2513645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef07e3a79e2579331fa641f47ae4ed56b6bc8124c6d4ec31dbb887c0ab4bbcf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ROCMA2513650.