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 0xb76cb4cee4c668b3cc40f2e345226c80c5ce10d4f4ab7033065b70d4e70af09c. 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/61d8c7b1-e4ba-46a9-90de-5db49aae011f.json and https://artists.proofprofile.net/proofs/artist/61d8c7b1-e4ba-46a9-90de-5db49aae011f.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 0x105f352b632efd079e7b09b71cc99144304fb1bd400e96804b9d44c244d5743a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/IDA832302793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7722a0528f833d32c0299d112d2d96fba12b95ac07a6db318d5eff7dfbca0a56. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IDA832302845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9180b411b7f2717a5b3378501467487368173da61f008258eeaa62b36f64fb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:28:33Z), 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/IDA832302889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcccde3211fb56c6f6c0f8fe0c40c0f6f8a82c2a0378e7d86d9135786c6ff263. 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/IDA832302920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb943ecf2237115761bd8c8e0058cfa252967e26b51e46d63e64e4065a00dfe. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/IDA832303123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b74cbe9f50a847e54e4345451dc95bb686362f9131491f91c387a5767526d09. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:33Z), 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/IDA832303258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e6275dc2baedefd6b48bc63c93d6c6a6a23156f4a02d13830c3798b3953270. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IDA832303446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8551dbf9d17dd0d42290f61dce28c612b815b3e9a06ea2d539175e132febb450. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/IDA832400858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200c96aa5b1f9b6608ce5ba537e0f9b5afa9b599960f8f7775a4531ccb9d1264. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IDA832401872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd89460be83022ae8d589715dd240266ed65c62aecff77c2c305bc92ba6222dc. 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/IDA832402459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72315327a7de4463f99d9c4050ae9797620b3b2cbe7ee42429fb54e8fe959892. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/IDA832403786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c991e1ed813c66602f6fd9841f7eb317ea50a06a5306793d5b2e339c24f234. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V2432728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd9f73011b81b23ba27caceea49498ee0fba630f0786a6d8e2dd23657288ad5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:31Z), 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/IDA832501700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a86caa5fdc9a6105380e9214bd77101963b63eec711c69ab9ff558ee8d5795c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IDA832501762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d83c32a25299e36e251e24ba50f2e62e25d28901dc31735baddd412bfe0795. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IDA832502305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195d8fbf9b08bf0f22a5bb9a98fbef095ac451557af30ed64e995a0384f063d4. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/IDA832402465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397a2c0e763dcd3779789e68e2d9de5901461d873f9509715becce3affa180ed. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IDA832503911.