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 0xf7e01e27c80411b190ffd9e2ab950ca25b0cd3b5f4cfae2df022ff4749b83e1b. 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/442dbfb7-261d-4e13-a380-c8816a8855e3.json and https://artists.proofprofile.net/proofs/artist/442dbfb7-261d-4e13-a380-c8816a8855e3.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 0xd34d3541502ac422eb4ac7e7a587c3aad8c1f83bdde1fb72e6d7c4938d0ec319. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAEC1955341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccaef83e8e174d8421bebf9ae3e46cab352fad9774af823b985bf25c0bd9ec8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAEC1955348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257981b9f469a4cdc2a4d5ea84fe0953c0955ae60f6a7b0d7f80dc3e2e28ff64. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAEC1955354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde68918c4c0abeac2575af8b1023e242479b592758e20562bf85bc1692745154. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCAEK1957812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65b38bbd689974b2964c9bc86a5e31c359fdab8080bf6cc2f021281944f041e. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAEK1957816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdffecfce01d80d5ed89dd311a64de1ff304dd4ea88ee7ba2fc3ecfd4b1a836. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEK1957826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e6205e5e03370b8285e434a5e3be33e224974c370fd4744b0750e5ff8fe635. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAEK1957839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc996546e27a82d0ac8f6029ffc7697886071df47229041450cc8bbd7f4f03fff. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/TCAEK1957841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072ee6bb9dd23af9b399bcd218a764dbf9181afee768851b9040192fe53af677. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAEK1957844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244be5bff28fc68c41daa93d85b3581f5224be3c4aa6c897157a0bd69a7ab9d7. 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/TCAEK1957851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622c4d036eea197a6c51fb1e4fcbf3c0b152749162d48f319045aea52e14d8e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAEP1917053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a383b580a286ca8910c3ecafb7ba26308f9104616e82031917667f257c942a0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:56Z), 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/TCAEU2075131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7dd73e4ac999f23e92cc0c034140011cf2a87926155053afa3c7d0f2d27e12. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAFU2121571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fd105304a4c8c7379983cb126bc1220e6aff9a606ea8471a8744bc125c6ab6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAFF2020470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea46211dce0174b2692651c6a7e37b771cc8e23a1959c8bb6c2a1318ae68eff. 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/TCAFL2114971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5e3d295ca87cd1968ac5bd1decdca2bb395f58fa33f6708654be4166eabce3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:02Z), 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/TCAGE2278117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fd105304a4c8c7379983cb126bc1220e6aff9a606ea8471a8744bc125c6ab6. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/TCAFF2020470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fe1b5841bfaa18f3aefa15fc0e9648a4769e2bbb0dcdadf737ace7356ef9d9. 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/TCAGE2278161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4465e03ac0fe2880248bfc1b942224394dc72433005ce64b055da0ceb641843f. 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/TCAGE2278163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5384b3537a0d623dfa5def4de6a2ba0991a1fb1fb2694335c0059631439c41ca. 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/TCAGE2278166.
Y'a Assez D'Drogues Pour Tout L'Monde Pourquoi Tu Noye?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe138823448beb56ab4613c35bcb4107b7aba5edc2efffeb0c6ff95c7621478d6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGE2278171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620aa29ebdbcb13d48c85e208b489c4c85a51394fe71c6c62b1a64869a339253. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAGE2278173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8db09fa8e58d603b3ce1bfa9dfe3123024d6df41fae696986b9b0c5acb4fbe. 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/TCAGE2278175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16446f56273eaf2667966cf7f5c46702cf2f130362494ea2b6319371931dd518. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAGE2278179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d9215ef837850b44fe3901e242e0b118fba8f6438cd1037963b9b3c0d86f6c. 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/TCAGE2278183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea46211dce0174b2692651c6a7e37b771cc8e23a1959c8bb6c2a1318ae68eff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFL2114971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eecd2c2675f703c3719cf99396c3b07142fd53a98634a3c0b8791a1bd67af9. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAFG2093672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b66c4fc7224cf929dd3c140ce63868c344f151280df2f3d5e5659d56169ead3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAGE2278205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c89a4b2c50d3f5c0ddddfdb2e2376efbf3a246e09523e3cc3dd0c96e031fc1f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:25Z), 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/TCAGE2278208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e84f35b67c5a5930a105b956b180f4323e85f5dc40b8df73151019eb92e746. 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/QM24S1846166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb9bdab90be2446333893974ff4e2a4de65039c9c74ed0794a9443379449d7a. 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/QZHNA2273225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0566f227ed8ec41e78b767f3333cd630d7de29b2bcdfdd672ca59fbbc4e30ae. 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/QM24S2003359.
La Cassette Vol. 2 : BIENVENUE DANS LE TRAIN FANTÔME
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b26539c19f9bf830d5ececa4763dabe71c81b210e1e75d8453f0beb0c1ec3c1. 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/QT3F22499498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c9ca0abe2b4f50e88054ee1cecc03512d3d43dbf9ce870e24e00a52681a669. 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/QZK6N1961635.