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 0xabd3eb9d29c7bf2fb55a63d93ace5f1c3edf77c407596895c811448e0d592734. 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/86947f4d-6515-4383-b877-f3da86967d66.json and https://artists.proofprofile.net/proofs/artist/86947f4d-6515-4383-b877-f3da86967d66.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 0x3a8118cd245f0822497d5532a2fcf1839bfa5933b0c1c6699a95e93b88b474fc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DE1A42140887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba3635a9c40f8a9b7e414745c782776b8bfda48e1c72a7cff20f270fd52e89b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DE1A42141721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9b80d6a00eed6f9753c506f4155c71ac0b52b36824461cb5d2dbf9f7bda1c2. 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/DE1A42140889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7f6879f0f6dc2eab28034b02fc093c8be44fef56ffff50a4adb2d391c3edc5. 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/DE1A42140891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fb22a3aa47b17a165ffc721959ba597e575ca763c8b830f2b0e21512ae3273. 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/DE1A42141725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044b251783c09aaf4e08e5cfb462947ba05e0af3551cb1e0e384d2f482a028c7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DE1A42140893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff44e42dfb077610438a036c9e83e3c9cfe7870c91d937c22cf0e3b0e419a68c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DE1A42140895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103f69fd3352906e5051af60ddf1215f475f4b85483db29df8a9ffbc5538f190. 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/DE1A42141729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b008ea510a13a0b70ca61943143dc51664170febbaab7c41a46bed04167bc45. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DE1A42141731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc33c9640f6a87424c1ba9ff00797dfaf2f84f252001c4314e2dc1cfca836f99. 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/DE1A42140899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ccc0309680e498c03cdd9a5e798aea418bf2a460f7cd37868ffb91df8d9661. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DE1A42140901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b80054b5427628df39830fff4db3b2a30a8059a06e950cf1c1b0e764e48e3db. 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/DE1A42141766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a39a2482f0847667dcc935bf1fa80e863ba87484cb552e81d61d165bb985ec. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DEZZ42149085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b85e7731a017e764502a1b9c291ad36442cfd7224bed2d8424d0ddb8ef6cb4. 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/DEZZ42149086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde968d61e235eea367a6109f5389fc93bd95ce766f89583a519d2af1ff3e8f51. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DE1A42141755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07613d6213710c50eb9c8443df35a54ecc6532d7564d2c8aad1aa3296368db8. 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/DE1A42141758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6f4250fdac632e8a96bdf0001ee65224c1a25b3933d84d43aaf0e3c3f93ed8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMFME1318130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5e350090292175a231a0bc168ac966cede64a6b62bb858fe96f850d7ab27ca. 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/QMFME1305531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0fd64adbb5b64082bdaa9b5f2d7547ff60555df66ab4c97e824991a5cbaa93. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QMFME1305532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa68f64c70944afd6d321f510f3b26e0fae5ec489569504c847de334c7e232d. 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/QMFME1305536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b26341f3f33b84e6e751ed41383d7f87d4d94ec7712c40f5923366d41f3b25. 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/QMFME1305538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799ebc03d891e9cfcb8e8027d6d8692df5906f5d8412e9d7ef12287bec8781d0. 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/QMFME1305539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bd6f4e3ed1e9b8bbb8d43a5b742b8bb118485097c5784bf8b8c5f0dccbaf64. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DE1A42141793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa961d235d70d0c37c518676069a9dfea8419924dadcbb5a629f504aa007b584. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DE1A32127733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f655432a3ceda8f4eccba1da5da1ca0fd542aa52ff0194b7d192a119ab71e0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DE1A42141806.
Coplas del Pajarito (The Little Bird's Complaint)
Cancion Protesta: Protest Songs of Latin America
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f12a6480b65b346b7f3d53d5f67ac442b7c607f10756eb49531d209cbeb6176. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USSF17000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa961d235d70d0c37c518676069a9dfea8419924dadcbb5a629f504aa007b584. 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/DE1A32127733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d45d5133bca7e7cd41daff2526df58ab18c2731f7fa61cd2e63423b992da296. 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/ITN731003343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bed2d180535c0889421ea647f196a94395a0623620a119a7dc02a8c62b4314c. 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/ITN731003346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52ad934aa735b612febf1d8d519edfdaacdfaec9caf1c793788a4c821e1e7f0. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/ITN731003347.
La Música de Chile, Chilean Music. For Export
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cebcc8cf16831dd524105dc34514a4b23aec774f9c0bd62afd4cdf747f0f97. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM6MZ1573898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe276e05f0defae94bf67e3f9566e4114893024b59c33c36cbdae28e0d4efa66c. 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/QM6MZ1573904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d1e1d3ab708c332d6afb56907023f4de560dc38c08923f9ea31af67be21459. 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/USA561359536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7138f4e7d2e3bb59a9322094bba96b3b031e4c2a1ce4937eb608fddd23f1a712. 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/USA561359542.
Geografía Musical de Chile (El Folklore de Chile, Vol. IX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b29aaf2298bb6278c6329618a4b4546c979cf8c3b3b69ba841e2ac80df8d77b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DE1A22107372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5542a88ac4d03b8910d22a94e407c0d8a7cda4c0998d79740b90337ce1b0af77. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DE1A22107383.
Folklore por el Conjunto Cuncumen (El Folklore de Chile, Vol. VII)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6293040cb4f943751abd4b039ca77469cb014b3837f9d89ae3dd3f44a490c429. 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/DE1A22107362.