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 0xbf173594a47460ff3986236b1cce51b3a1e97b0dd9f313d81307c9e58781cfb7. 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/1fa2cf30-7b5e-4152-a30f-9e1c33cc4a1e.json and https://artists.proofprofile.net/proofs/artist/1fa2cf30-7b5e-4152-a30f-9e1c33cc4a1e.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 0x0d6fe20c4b22477c24ba9c194175d052f8d13317c131d8f91e58212070e008ec. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:44Z), 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/QZHN52346245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6090188cdb51e7e0948da20b1b3df78ef74267a44a8ef4e953788f3889a84344. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:01Z), 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/QZHN72324391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c11483374af3354a25039d876d2091dabcfe97a92878fec35ec16c612142b47. 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/QZMEN2333462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6b05d5827c34592ed624884842d62df15a9f85393c54cba2d1713fa00d4bc1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNWT2355717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3274c443617d0f93ad19784e3ee86d982d02d6ac6a9fa80b59547650abd5e3. 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/ES31E2401668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a3fbeeea944a1b19b966c23302093cf0e434c313e72344d9257d397b1bd71a. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/ES31E2401355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05156a44d9d94b472a20de699defcc5122cb48bfc8fed08e5eeec400532554c. 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/ES31E2413627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf769f668e54fa92e40f48f384d692ce0117213f7e52ae336797c8809a067c36d. 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/ES31E2500797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe989d389742cfbca9210e77c743a8083bab513b4ba669e54f96e29e2c04c1e94. 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/ES31E2505030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5252c3e10300f4b9b67607e50ec727086a61b707465d2783df22e07233ba648. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES31E2512333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa530a0bab45814b318d37c13494504a7b58a1e68a471a93aef6359a3135c9a9c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES31E2513124.