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 0x3c5c5e0d8ce6713aad994c548a2e118dd2775f6dba8ab5499a1c28c4830f6c5e. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24325c6f-29ac-4329-88dd-e0b7fba14422.json and https://artists.proofprofile.net/proofs/artist/24325c6f-29ac-4329-88dd-e0b7fba14422.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 0x118360ef310ea71db829a480e606cd164739194d0fe93292635dd22903f3bce1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2253386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd8245fe71c235f56fdff3c9188491b0f956762aedb91232316460fdb18393f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:19:51Z), 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/QM3DF2253375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217f1c1459726240de80e22b2c33446cabffc4c887d20f5f0b14273f1c56ad17. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:18:34Z), 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/QM7281437534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd46946d0037e467ddcefbe36841042c3c3d8ddcaf45e0b05461b00a5f262f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7281437537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3b9359e01394f7006de73db164001bc6a0ace14d1168b8ef67097ca05510f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM7281437541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc721b2c5be8a9bd379ad0254c11e31b725eddd059747500ca501a94429f1f09. 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/QM7281437542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e6d85625d667c9af58a65ffb8b30962b76ed2964ca7c0240ef7a9aec2083ee. 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/QM7281437545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf54f62391f4b93ed95cc78038057c6b8da89d9e14e81b54497d9d98478b613. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281437546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe349d8f3164bd151c45fd5869733bd48b879f14dc10d2afd6167b789988c7c03. 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/QM7281437547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f876e58bac784fbe55ff27ce1a2722b088d2c0fd9d4d2c7a179774225251677. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:37Z), 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/QM7281437536.
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 0x686681decf23232b9a017c8620b8331d8617cd2c1bf2306d422b055e75855316. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:49Z), 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/QM7281437540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dba41ddda3ab2e93d4401ff1f549c18edf194c7d5577c4be0fe471f7aee68c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM7281437535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eef3c82244ef797f36e6aa444b58e6bd3f735204b884fd3c3f318ced2534f8b. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QM7281437538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10abeac627e3b6537af5ebdc253da1848c9c6e34d50509440fdaed3326d7fa62. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM7281437539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e9fdddd7d9ce61f3da6a57df4940db523230f7403d68f72e16e684bdeb876a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM7281437543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad20d7def370a4943a12e0cbd859d70ea4bf5255a1f71562bf033671f80546a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM7281437544.