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 0xf414a315246fef264c666811c5f0c24394d7bd73801369e08b236c95cba73ccb. 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/6fea5fa6-c139-4702-aede-875c55281087.json and https://artists.proofprofile.net/proofs/artist/6fea5fa6-c139-4702-aede-875c55281087.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 0x39fd8da674185de2c1f1abd3645ffe740a36cf93a627871ce9e67ec38fa2977f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR9W11923370.
David Bowie in Jazz (A Jazz Tribute to David Bowie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece48932fec6a24700520279d8f7589080b3a7adeb7584b7bafe07493a5a85c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA31S1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26556779c7596cc34b9568e9f73a123e08d455ae1c9e3b0d139b82ae41ede131. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITB551513758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c2b16be8614092a8ee3e43d63e260160d8ea6ee3a052dd0b083ba9a38f5eda. 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/FR1F30500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa229d93532aba87cea32edca5348bc9c5aa9078ac2404dad8ea7efa4b142aa59. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEA891300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60c1f975ccd0e2b5d3d95bbd34d1e8fa637624b1a6b99c5c63fa194d073abee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRY671910106.
Life on Mars (feat. Paul Lay, Sylvain Romano & Donald Kontomanou)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4afeeaa6a93ca75453caeef05e053daafd51ed7d7123c2c0b56506d2574920. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11508140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f62609b3c1b271d164f15132c327bb076d2cbb3922f8d0749678ff55d41b1b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEXBV1800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddca7839b67b632b3eff1357c42e99fd9a8a78ad7db8fe78a70dcb0f00d0f99d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR9W11820560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac24fcf64361988ab80e3679adafa4c4f1dc70501db2981819fc55d6256c74f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEBL60948193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfc1cb3224885f9e747329cbfd4a8b240a6074077e54af75a702ed0fd2a4428. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGH0853545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb835e0e3b569bbcabe829b92c637dd28324fe718202831b7a9d4789043f70cd4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKN2F1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffea1e2a343f59c71a6bb11a9e9343886883fc7599e01051f84884ccbaf822a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRY671910107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473448628998575d9bf254440a6688bc6e82fdf6d0b46b15356e797ded87911b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11923372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d875a9e4fc12fca2d11027d828647e5a172bacc2e560340eec1407436b2de31. 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/CH6541902602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8826f266737cd711dc1e704e81d1d646da04ecddc7f69978a62d89c2e58e4bea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6541902603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4479f1c393cc93de5f2b22a67916d2b7687f36162118b3c86b6008efce8fe442. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FRX191403755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e0685fa6a0813542936cd8a38c3588f666f4807c4673aafba10557555f3be7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX191403757.
Demain dès l'aube - Live in Uhrwiller 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73192e1316faed5f79d90c053d210a5316415b512104154b23911352dca0fea. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR9W11716594.