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 0xae3ce13fa229a2c2863f96aef6a581537a0e7836adf996f1639637863461016d. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e3f7961-6edf-4b86-a777-26907e3ca5cc.json and https://artists.proofprofile.net/proofs/artist/1e3f7961-6edf-4b86-a777-26907e3ca5cc.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 0x56ebfdf57befe010b6ea81ff3202c1aa76a3fe65ea52de08149425ffc531ecf9. 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/ES71G1922825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdc98483a245094dca237c9bdfa0ebc740dcead09d90f763888216a9658a42a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ART161304901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a527a6dd16fc3923d10c59fb12b3b0c0dc8bcb539dc4015e52dd1cd00f9254a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ART161304902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36135eb732781e85f43ba81ffd0d773e5bb0202d7e6a5c942709f98e2ffc45b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ART161304903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd377a589bdb19be94b8df0366b5aa85d2fd9a7dae499ecf7b6a23d390ea44f31. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ART161304904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51792ab18625c70d6f9ee5981615ace3bb4b4935c4fca426c6485b8078617945. 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/ART161304905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2b190713971335f5296b81c1cefef595ee526c8f48f152a261eef47c981bb0. 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/ART161304906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daa6b6647b7027db597c079584458afad56541cddd81a8973b03a433eef0876. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ART161304907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda314f628c4e036c787b59a2c6f1a7526b36a42c9ac757f47f8f3479a5d8fddc. 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/ART161304908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0c0c1c8b78b8758edbc51137edd65f912cb86e65ac5c1d68eb4af1daddf7af. 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/ART161304909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6738144bd96ed3bfd016bf2cd3c4e308b5b98f994a0a460c5926ff85b927f77. 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/ART161304910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a910d5d70954ca8f2192dca3f7d903d9a6443e5b88159d580554ffd6ce7af4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARC171030001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0134ab2ab72bce903da3c466d39b31abbb8a9de580f6f74a60d2f2cb6452d3f9. 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/ARC171030002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af170b2c6e13bc1336169eccc4f6bd199a90a8f2a31a162c5502fe02095cdc. 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/ARC171030003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8a4ed76c9c0de5ccca557b80180d66f0298cb86b8a0b4db7e17bc894085b2e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARC171030004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae29110ced3010eebaa6c596a54393edffb17ddf0c0cda6c435808e68fcad64d. 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/ARC171030005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5137aa08fe9c0817d6349dc15a003c0f43f2c0ed2941d319d9c5ec26d3f050c9. 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/ARC171030006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120dc6b91c72bcd60cd35cb2b2e1202226fd5141463b53546599ba5ca7d9bf36. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ARC171030007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bece41299b91db218a95bc480fdbc59b229f77db120a28af7c2607416d37074. 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/ARC171030008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea773886b63f4bc1a41876a4b74319e4def929933dc2ff8aa2c2355ee7a1ff7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ARC171030009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa82aa6699367bbf19c72a89a05aec54df1b7638e117efebda19275e372593c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ARC171030010.
Pelea Navideña Presenta: Mamá Llegó Borracha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64440e2d510fa4a4ec562e353656010b91de3fbfa643b59a1c958d100bf44620. 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/AR7021700735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d92979a5d4a1c80e65fe17890d10cb628967a81c25242148a78ce8846e1c814. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/AR7021700737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8d998f77c20c4856b6ea283181c3cbff1bd80b9fd848674ecdedadf9bae9a5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/AR7021700736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e951be6149e05556fa1b29aa6db9ef6bcd8e938580796f56b57dc910b2e3879. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/AR7021700738.