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 0xb850c8b1de7329a51be275953920ebdffe7368e49facb19741e4ee78fa72e859. 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/91959774-eb73-4abe-9606-ded17779a8a3.json and https://artists.proofprofile.net/proofs/artist/91959774-eb73-4abe-9606-ded17779a8a3.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 0x45d6f3c6a00ed598aacd48098eb2b8498efb6a5b6dcebec4600a00d8eba65926. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM91330117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac016f8df9163a3b2bfd4d9face680bbbe3920bb71572e7e71ef490578a87f0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USX9P1157730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55979bee0efc380112facb4fba9a16450ca6beb41768b3d57470da039722a9ad. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:57Z), 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/USX9P1157733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8de1f7685191e934f51fd4f011afc3719b33a41398cd901e71fcf92e74290d7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:43:41Z), 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/USHM21256793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b2e614d125b6932997ae4d7cb0a1be4bbe0fa2c1655210ca50c9f7284ef463. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM21256797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87fccd0df18c947a1a93587b19f3469ddc113bd4b93e13447fe1827b876fdd8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM21256802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd085527617a2e84a46a2d9c61412b8e326230e870f3d8d4972c323204bdb2c4e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCACH1562796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2c3a846880641c383212a4c7aec6db42c8b9ec4e310639202a20d73956a851. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:09Z), 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/QM3KC1500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f940b2883d0d44e7d8f3327430dc83e33b8b6b3fa8759ce06638eb49912fe79. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM3KC1500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe081ef6da4f1e6f00bac3081bc0d9a0ddac99be20f866d9231e5530e3d2c7271. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:53:10Z), 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/QM3KC1500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb100ee16da996778b5ac1ba7d4e29218886a18ab2b43d1b931370e0f95dd180. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM3KC1500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1d95e950acd8b23a2567844a7ff959c08fe39b0c144af2ec3aefc8a20b5856. 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/QM3KC1500167.