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 0x633b08a97fce9ebe3e92967e771e453d487da9413e6e75edc181f765884634f3. 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/311532c0-0df2-472f-92cf-ad0e14668f39.json and https://artists.proofprofile.net/proofs/artist/311532c0-0df2-472f-92cf-ad0e14668f39.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 0x32728c20bf4d4986664581324e4fba90bc35736a209db0b05181e1056897ee44. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:50:04Z), 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/MXF010000977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6ec4f21f9902c76e6ca50649c4d6b61b23b601e89f565bc9318f5fb64fe649. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:02Z), 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/MXF010100508.
15 Grandes Éxitos De Amalia Mendoza "La Tariacuri"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7456e60b8e975338364f14e15939980ff7cd91076e42e0a4544c9183121345. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:08:57Z), 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/MXF010000975.
El Silencio De La Noche (with José Alfredo Jiménez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82531fd5bc7ba564522be71c4eef5aa7089eb8dd1f4d2f7ed2c7206e5536d191. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:01:03Z), 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/MXF016400337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6c28961d789202fbb6ca0ffaf35c8d6384be0da24c35857a5a68cb37792081. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:31Z), 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/MXF019100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6cb06439737fe6279cfb7905de8ca82c5f9913b72e06096343c9d9b4cbe285. 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/MXF016800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0848f32deb7c0f42dd6a14015a022fa68bab3b266785130d5cb04138ce539dc. 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/MXF016000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d78a027395991ad0d1df9e55ae045018e71640e683d5657e106e3eaf38516c. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/MXF016400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64af44c3f087d3eff4d6b30c83cf84f31b892b0f42820409626a494100bd7532. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/MXF019100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8456767e6b333434cb53690560e22fe22765380e1a2b606ab3fb753b96e0172. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/MXF019100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bf51b086fd663081324c262fdc52aa05d2335137da598ab0519dde9193012e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:01Z), 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/MXF019100415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32f0c75d548cfac58c62c3e48991c99c61fc9751379666e9802b369a08a25f2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:53Z), 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/MXF019100369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c245d80585be85c91d9f9ab2bb686073779f5efbfe46e3e611129dde60cc772. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/MXF018501292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38be779de79b3d7a1953e77269bd411c575873f0b47e8a901343d3786082bfe. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/MXF019701087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20718d2062daf2124d50fc2e73ce0b231d8b6e7bbbd9f977d69d365045d5a311. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES6601402495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf150cf818d20ae3f7e76cb1cd6efd3ab56b4d4c57c2385c9980b7e42d661a834. 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/ES6601402498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2931100b4fab3de32538ecb8821b7865550cab8f15f18b44eb3906194d4880a7. 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/ES6601402500.