Costa Azul is a village and resort of the Costa de Oro in the Canelones Department of southern Uruguay. Population In 2011 Costa Azul had a population of 965. Year Population 1963 271 1975 456
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 0xc0f8dcd02e7defd757b5f1f4c3c40ad2728f180ad9823c1ca8e74314fc3019f6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8408f9eb-637a-4491-abbd-a60f89c8cf53.json and https://artists.proofprofile.net/proofs/artist/8408f9eb-637a-4491-abbd-a60f89c8cf53.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 0x2c461f9de9961bbae09078cfcbbbd738123dee78b5a96f554d58f7520a94d00c. 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/US3DF1531434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410f65f9997d14769c495a8155943b80fe0342a149346a6f0b1143e392cd9a2a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF1531440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e5bdce8a29f0f37d8d304d63850ed5f675adb1406e2e6c430cdfe660036112. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF1531441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4183e5f697a5e603a7c557d08db4764a3dc95ebdc27e3dd6d6578f9948f4c008. 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/USV351497835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0831197c90e39f59b60878af8a702143462519586d29fd0511ae8ef08d627a. 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/USV351497837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e455ed14fd14f0158347de16aa12e9cb5a8ab06274aa616b6d2ebdc4f62e3df. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/MXD941804712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3867c0a2e4e36c64bea6b6dab01c63ed9127eea00d835cedb68dee6274b91e74. 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/MXD941804713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3564d4a1fc398bfe0eca0e90cbd02291b1d9610b1f7a3c833669650ccc788cd. 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/MXD941804714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c574a8e7dccc87ccaaacbfb0db1b20915074f8d2bd34eac5e6b12791b679ea7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/MXD941804715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec5859ce796b825b23ea44b9b9d6bcbf7b5fce380225750c2fa72b919170821. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXD941804717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9454273e16d8b603ea0f07f1437538d212d4589ba3d55ec931954bd785f10a49. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:56Z), 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/MXD941804718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ec9040ee596458e0bbe73fe8732269bf1644067e9adb764b5df9d182933ff6. 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/MXD941804724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0dd6c31629f86c471180dd9d720121532414beba38eec700525ce9119185ca. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/MXD941804725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84d125727bf45c09886a6f8fc1f8fcb51561aabf7e6fb8bebc24cb7667cba55. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/MXD941804726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17efecef8b927e21646e6e28b7fe3b5d9c76a5761ce3fbd37646836f4bef19c. 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/MXD941804727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87af55cb63788ce86bec2ac148c7e03512ca5046c55357c9c893906ea3fff4a7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MXD941804730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719a6679e58bfba89a810c8bf08a53f5637f5f4e9065ebced1cac7d409572bd. 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/MXD941804731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde56b739c05e4f4c881ef32a37363af51f9143b3c926d1c5af2eb73b33dba214. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/MXD941804732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34c9b65400e825ab8e44c82c0b22aceb3da1914ba170483ac96920004ee117a. 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/QM6DC1528881.