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 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 0x733da66b788cf43d5e08fdae384c015113658ec19f89c3ede5acd1aea36490da. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77759090-4f2e-4610-99b0-e8162d681ecf.json and https://artists.proofprofile.net/proofs/artist/77759090-4f2e-4610-99b0-e8162d681ecf.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 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 0xc0fd5f01973895ca857979df75081517041f43c323286248c5f557466f22749b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6K2595985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a36bf6e92517fe5cbc9b416b12a4606b87dcd23122769170371037e97f8389. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6K2598022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9277fa64a0486a932f1bc3d272dd79ddca8006205cdca22afa44874722ecc53a. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZNWT2564328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003b7b7f89b402e216fdea1bae0978be07ec04a4277c96cc4f22e0b649c62b58. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6K2598034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47ba844ea63dc06bed3fe190275182aa9ecc4beefb0a2a27058332c596ad178. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6J2500478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eed2622a6ba1ba565df463e8a6224eea2bd2fb89090ab8392d2c3b2b246613. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZK6K2598025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7024ebfc6412e60b85dac2382f0384903b6cacf9e3653190b7bb06e7356a604b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZK6K2598012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95f0ff3eee8c9e1d7fd14500771ad42c8d923fd14d6745b4852c7bc04c776d7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEN2563308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ce9c069240c77887d9aaacf53852492032ad11818f6ab9fb99b26aac709a87. 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/QZMEN2561394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f5380debe7eecd017ead224069c5375432bcc68db94af9d1b194cc9877bdab. 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/QZMEQ2515698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5525a25c7e1cad7270c66c9102c9fe12a9754f77911dfc9927844895e96b3a1c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWT2566384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9dc9dca495e9c3b7f4c889f86cab507584c8fbcd2a3512cedd74e663df8b6a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZPLR2515396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0482ddf06c5b28ead9625d82e7b0e927d419b381fd72729b4a682a430991ef8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFK2575896.
Marie si Marioara Lelita Carciumareasa Vecina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15622993d1a99b9464541c6c1a4b2f12b6628fa9ef38b7d7e0a123c91b22e5e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7P2517408.