thumb|The world in 250 __NOTOC__ Year 250 (CCL) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Traianus and Gratus (or, less f
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 0x6665c44eea3d2baac27cc78886d35c0dd6e13f3562d876cb747fdb0ff072fabe. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1935a0d8-4385-488c-bbe1-3160abaf412d.json and https://artists.proofprofile.net/proofs/artist/1935a0d8-4385-488c-bbe1-3160abaf412d.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 0xdf301465794d22914e752e0627d5c70ab8fc1182090e43bf5653782308134ec1. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QM4TX2213908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93db20aaa4a0127ad5daa56f10e64e53c52e941affbb1d9767ee85eb85bf767d. 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/QM4TX2213909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479539ac8bce29e627df3d1a0bb5c8aa2453c8aff2cd9e8eb289f2e763bee563. 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/QM4TX2213910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a45e6547f1a9ed322817e6003c8258355fc160696ad2331301a5de2b88fe34. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:18:41Z), 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/QM4TX2213911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7731a2db79d951fd71154377fc65bdb69d4f0e43e56d2957c1a7eef6c19463e7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:08Z), 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/QM4TX2213912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae101b4f7ce3ad4324252037258c68f61bd88165f58e06abc034a58fff07245e. 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/QM4TX2213913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419a614ee6f8f75722699f05d6962c82e3cc9ffefd0b8e712239d3636d7b6b97. 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/QM4TX2213914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aa0c89d50b1f5a8b70fa3ee79ebafa5b54682c0adaed9ef4f41391a76deebd. 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/QM4TX2213915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866a7be442bf291343bd89d1bc05a4e11ee978c76cc79ff225d4b15f379de83c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM4TX2213916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a2c538d7dc3cf8fd1dd0796fad6c222944c05c2889dd070ae77674ac786933. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM4TX2213917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d570ff20a2359a534da84023441b90f621993da967166c3bc5060773de68ef3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM4TX2213907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf301465794d22914e752e0627d5c70ab8fc1182090e43bf5653782308134ec1. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QM4TX2213908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93db20aaa4a0127ad5daa56f10e64e53c52e941affbb1d9767ee85eb85bf767d. 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/QM4TX2213909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479539ac8bce29e627df3d1a0bb5c8aa2453c8aff2cd9e8eb289f2e763bee563. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TX2213910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a45e6547f1a9ed322817e6003c8258355fc160696ad2331301a5de2b88fe34. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:42:25Z), 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/QM4TX2213911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7731a2db79d951fd71154377fc65bdb69d4f0e43e56d2957c1a7eef6c19463e7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM4TX2213912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae101b4f7ce3ad4324252037258c68f61bd88165f58e06abc034a58fff07245e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2213913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419a614ee6f8f75722699f05d6962c82e3cc9ffefd0b8e712239d3636d7b6b97. 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/QM4TX2213914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866a7be442bf291343bd89d1bc05a4e11ee978c76cc79ff225d4b15f379de83c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:44:43Z), 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/QM4TX2213916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a2c538d7dc3cf8fd1dd0796fad6c222944c05c2889dd070ae77674ac786933. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM4TX2213917.