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 0x60691970309d303ee5bdba8fe0a269b4a47579066384b4cb60ae577f92149d44. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c388448-0ee1-4dc0-8573-6047d9176e3f.json and https://artists.proofprofile.net/proofs/artist/0c388448-0ee1-4dc0-8573-6047d9176e3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Privada Desde la Cuadra 3 Amigos (En vivo)
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 0x0a0f9227d24bd946455c1f2683ac6b7d805c8da3a705c93bfcb0102499ddd861. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ32115829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3239a9aaffb480160bc754b7888b8a411242fa68ac3477bb86579d85a1ceb511. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFZ32115830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53314ba94d0b707109dead6f5eab9b4290bc34a7b1079627d602cdd737f6f2b2. 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/QZFZ32115834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4518292587fdf40111dc4f534ae0af2882e516dc956c8f095adae47eae12b0da. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZNWS2106634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f61986f372ea5eeae4ecdc23feccc6306180705a20794f421b37458235c40ba. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USCGH2016201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b97ec5d0553981ebdd67f1ac60ff475fc7fc682a87c36bf7539fc9ff9c9bd8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6N2166861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913c13845d6398bb391fdea2dec0092fbcb58f9fe6f244efa34d829a7e8a1494. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEP2162929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca22399d827419b3d5d43f2741347e1e16b7f5fe7e5c1351c61ddf228cde17e. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZPLS2240390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f8b77c12ededd94def3947060b3857ff996f75827571e50a627db0b6e8e4c4. 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/QZPLS2374472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88419ab3d3bbdc9559e83cf0687a35c45b1113ba0963ca68593cf1908354a92c. 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/QZTBC2315761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c18a7d50d4c7723e5c09b30b7c98c526d70c3bcfcc1d86dff27e9b7984e791f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWR2456768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f10ca3d06d1c33bb59a3c32391d00d38df74077941e9446220bdfeb3bdbf9b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZPLS2412455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c8678016006d3d5fffbd85191102b0a76ae22860a91dc8b2f047f5cdf39897. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFN2495969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb937ede10021c1ea8369fa6aa1e621296ac5a441a44db3e9c1d92ac72d2925c3. 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/QZZ7W2416843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070de011f8755ff5be41bb46c88d12e199255e5839b6412d88026cfe096632cf. 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/QMSAV1105717.