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 0xcedcb637d857b471084bffbbd05dbfd631cea12a80f358b96cca6def9d0e3921. 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/aa433dd2-d3e9-4156-ad67-44e5f0538391.json and https://artists.proofprofile.net/proofs/artist/aa433dd2-d3e9-4156-ad67-44e5f0538391.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 0xd0db38c835727d10d18e361aa33fa913f4065f7277026f155ee0db114383e7af. 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/FRX872037903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8771f77b1ec6d825abd3d2757a11377a5ebd76f94bb2c1c9e08987fa291e875. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DGA072149580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7172bb9ab063605965f4c9f9c394f2de7b002fa695d021f8407dddda1272f6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR2X42214700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fc9eb1ffb4f8490428e17ab3cb90ac24acde5a5b1a85b02c76383512ea7bb2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR2X42280583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac50c62233e58a8abee06244d0ecb617a978e677e5948a95c78ed16339397f95. 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/FRX282218800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7fb3eac134b2e5b5bdd4d6165e0b6f1665a6cc622940d1a9cba149021c2481. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DGA0S2423114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc7e6f5e02e75c7808c0aab3486c2b418086fd022d8d283d288f3fca91f35c7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0T2416896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e25ed1f630c3a118db7f5676717e7c735e70027fddbf6ebe4bdfa885c4efc7a. 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/FR10S2561322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e25ed1f630c3a118db7f5676717e7c735e70027fddbf6ebe4bdfa885c4efc7a. 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/FR10S2561322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1791b898934949bb045ab132e86d99636df7e6957b82bcd0575b460e73f46bbb. 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/FR2X42535331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc7e6f5e02e75c7808c0aab3486c2b418086fd022d8d283d288f3fca91f35c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0T2416896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a92b9c1e39f5cc1f295d086867d939bb4dfc6ae17854fa037663c3873c66876. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR2X42535332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbdcdd646af2ac7954463df793a48f99ba9784f7cc9e05e1da6b8ae3b435ced. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X42535333.
Nếu Biết Đó Là Lần Cuối (The PROfile Live Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb889253a37c746f2988719fc05afdf672ed66be8212f831d7f9513e82e2885ec. 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/QMFMF2540117.