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 0xd678e451238436bcbb97fcb283a50a0220705e6ff972c5b5bbd2076b570f1301. 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/ea5fdff3-935a-4bbd-aa53-2799effbdae8.json and https://artists.proofprofile.net/proofs/artist/ea5fdff3-935a-4bbd-aa53-2799effbdae8.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 0x184f512725206bde037b7b026fd3944ae55417c4b6dfef0e7c9e21eb323c2f0b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:07Z), 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/DEKV21612773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427eb24200238d98b5c0ea1788cd13915e03412bca0d8fae4c4f1edd39366c78. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEKV21612777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b633ced6a0f17c3a27c6eef7a4463d7259b563610509b1e3f3f95ffd25e3bf1. 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/DEZ901800923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff5ce95da44bcdcc7c244ca75a09f381524550aa37e22bf62f911b8faf43938. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ901800926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24312798b3926352232c74eff6218875cacebd5469a34c937d9e4c5990d1a1c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZ901800927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131eecabfc5490f6fee005f9c1ef4cde37da6079edab0ec52329e16ce4c64f85. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DEZ901800924.
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 0x07d122715896c67210acebe6deb6e6869d203f6ad13dd7038194431398b54d48. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEZ901800925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20739fb748fc63fa4f82a1d5020f641d3fa8bdace35e022a39949d7b0641475f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR96X2268685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b3834d8398c47459901c9007440b71c5f92f09da1768691b6fe71a32d49ae3. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:38Z), 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/DGA0P2467335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ca131dee0f52e55d774511baef2fc46d21316cf637b0e666ee12279e952451. 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/DEZ902400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57b13f64b7a16bba35f9c98c7b0f864c4d885722fcded2d0f411ee416018317. 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/DGA082442698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb52778462d234bea96151deb36f20c928b71f75020aff1e56354412426a4ca. 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/DEZ902400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d5a7cd36b5d4d196bede4c2bc144047ee8c65349751204a792328a5bdf4d9. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:58Z), 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/DEZ902400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9849fc406409d41839c310cbf7c2d85d5b754eb48a06b466ddae19580845c9b8. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEZ902400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e669f555dbea2676457d58a6f768908cb5c5607c76e0cf515c5936ef472d8a0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/DEZ902400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5304b760db2a9fc68f8ae30678851f313c8455be0a86ddcfe7b742c8a3484d1. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DEZ902400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9595143d68e613392b639a2c6575cfa89e95f745040c1099baa60a9d45ca2b7f. 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/FR96X2545277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b83f4dca6577b65b16302364bcc1c2e662d9b5489caaad047d63aab29aa0f80. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:42Z), 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/FR96X2545278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d5a7cd36b5d4d196bede4c2bc144047ee8c65349751204a792328a5bdf4d9. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/DEZ902400216.