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 0x4a555bd2b141e7d3db09102d9bdb85f9c12e94e3d12dc00faae497f8cc6b1a3d. 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/ed6ef5e6-2027-48a2-8939-3729a0b1faac.json and https://artists.proofprofile.net/proofs/artist/ed6ef5e6-2027-48a2-8939-3729a0b1faac.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 0x775795f0b3b845f1a334982296e90d5b9cfcb02cba5ff2d377db133e858167e3. 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/TCADH1714775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf111707c8533a58ff7e6ccfe38c25322e1566d11f657434e282e99636192e3ab. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADH1714782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d075b9df8cf5fdc8a19a76d82a0d178b4c48b757453ab35ee78dfb878eedc9a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCADH1714783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a4bbadb965cd9b35747e625377890bea6d35ee02ca72918fc72ad58354280. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADH1714785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa714a50bfa53cdc1dc79b7de323eb4a819555e4fc7a7d09b761294bcdfd02bca. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAFK2167682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30787633583e05de15019954df4111e4bfc23070d5500ed678934ef083f63a15. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAFK2167634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b865eb76432c9283582a7760664b58d8459439f31e887cfc839573db5f5bc1. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:00Z), 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/TCAFK2167749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eda0c8538b82001df55d9dc31fe417a59bc84312c62420dba7ca239fae5bcbe. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:57Z), 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/TCAFK2167652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c4993669b87630cdf0b295b1d5a24768bc27c509f3fcba231ff3dbbcd297f4. 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/TCAFK2167653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3e47092aaebdfb001a99f2331c49dd8c63743d844d0d18e1cdd1349a040260. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:58Z), 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/TCAFK2167657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94268f9b38929b3d5259b384cb9ca0896d9bf6917801b09badddba840ee960d3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:53:09Z), 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/TCAFK2167659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af86ef684dc28cd52a023f322244de82dd8a68255a9eac4e647995576367095. 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/TCAFM2109873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918142e5b116f78b0344879b4dfd3d9749b2314082350d0414a2ed603d3732db. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFM2110181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4254ddec86287a397ef228d7e4cbf68c8a855e01402c454c03b6f94c2db8bb4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:49:42Z), 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/TCAFU2113910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa569c650882745159dcb5ba6ee43e8c8f98ed901b8a365ea3629c81977b5fc. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:37:55Z), 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/TCAFU2113926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c63ac1ff365c4c4305c7f5e048255e99ef6b8b4a9e989b50a2bf4fcb576b00. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAFU2114085.