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 0x5e67b8585e7f71177cabe99e1d7cce00ee4b676b46c000cc30291320b0f68185. 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/925ea8b2-93fe-4105-a3e3-93bb75d724d0.json and https://artists.proofprofile.net/proofs/artist/925ea8b2-93fe-4105-a3e3-93bb75d724d0.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 0xe6feb848b3ffd7191b29628b350a502ac3c2b2368fcdcc8dfb6920b4fabc6dc5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USUL10401513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa399adac466c5d64f900879d4227501a41359ca32d2ec30b2be24ea0d1d6fec4. 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/USUL10401515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5863c6b4aa74520827fab2e12e3c65578007ceec3b3163cb843c07938048982. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USUL10401523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbfa6a507ae7f96dc3cbe21dcd0dd9cbc586909127e7452f6f4ea4322312f42. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USUL10401516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6e31ce4df664b40b7c5b83052991981d306a271a0cabbec5e2b78bed46e4eb. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USUL10401521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1211bcd02094e70700bb7af5b37176a2fea0360bbc93306140d321f11e909ab. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USUL10401518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f29fbbdb152befe91509b0fe68a6f690ffbfd3f3883532c378529c1cd78a189. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/USUL10401507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f86f7249bf2eda89b257e2f9d2e6c4f8505f6d320ff4511343da7b56f359843. 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/USUL10401509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec16d89049cf1cd163b696455f915d74b74d89d01a1a5b99af38e763cbc38fba. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUL10401524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3703c321c0ce64403b24b90b16cab33ce105ce87143093715bf9a5d0f63f225b. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USUL10401519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1733dcdd7bcbe1fa1a00abea629d6d0c84a22ef894b047f8270f09eefe969b65. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF1603119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5ba247b58a07cb365ca64ad39ebe81ee411a0b30453bd38379370876e947ad. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/US3DF1603121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e7b87bf1ccf0310b82111e8e3db26aa7566a55a184b0c95d94ce5324e9ceac. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/US3DF1603122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c73361f94c996b6f34d3654232a54430510cfaae9e9118c0e7b3de6162d75e2. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/US3DF1603127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa6fd922eb75e18afaa5a9c5f6a9474a8d3abd4d466303f54997d5e361baaf9. 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/ESA011774321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d2da63dc86db9f61d1d4e00e561083a2fd22ec6b1673237cb74133ac5cef2. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/ESA011519559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d3d2e0613faa86d8a816554890c6134f7cb583a1f6e48fc74243794f18b2f0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ESA012254749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1224645a40febaec1292bc810981a6f0ec1e02a87a0b253578a04072c656dbb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZXLZ2315838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a670ef874e0042027e9159f8d8a11558efe1f23324f59e4e9ff0755c03ffdaa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZXLZ2315839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b1787ddce302846fbb07fa44720b9e7d3536dd02c35d089ec2a3668d1616e1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZXLZ2315845.
El Alto Funcionario / Entre Hierva Polvo y Plomo / El Gallo de Sinaloa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf86129f858b5c6aa21f9f99dac34731c9d6b2be49b3275bd47c303f307a61c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZXLZ2510788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889d8c216ae3be4c4660d2eeb51d237fd7c80c26c9ec2116f57d361a709f7ccc. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZXLZ2524247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc47a8bf20ef2af7e77efa6348e9c1b5a04efbf3c65aa90a0a0e0d29517a246. 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/QZXLZ2524096.
20 Mas Buscadas de Tierra Caliente, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fd917508eae0ccc2ef6c044902d36ca7f7987c6b73e40d56974c79b1266c7e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZDQH2362083.
20 Exitos Con Lo Mejor de las Bandas Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382ea08d002ba3c2a09a08c0865805043bde33fc078d49b351f9cd2223ab0a36. 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/QZDQH2358234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6ce0c28e5b40dc7f44e5b728bdbbc3b005f7f8c7172cfb22d27887cf3eadd9. 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/ESA011540319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88fbab171c2c0051eec540b414e3aeaa56fb20995f06ebcaa9f7859e589a5d2. 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/QZDQH2353005.