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 0x97772d837f3336d78d93442cf01e3f02754c477d2690122e6a6dcd3ec58c8de0. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/969f9c44-79e2-411f-b733-663cf48b180f.json and https://artists.proofprofile.net/proofs/artist/969f9c44-79e2-411f-b733-663cf48b180f.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 0xcfc999b49a6d0bbac2086d373dc400e4c141598d4a3dc2989065920b67ed8b29. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZDQH2356260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aad0bddfc7e283861cf05494642b122a1c90504aa9d29303502036c6abeb9d. 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/QZDQH2356270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcddd3ef08304e43544e7cfd0595e02fad4f4484cd0eb48fc43c468039c1f2c2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCACU1622329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39509a4477666dd08cb5a299a307248ca5ed5b653fd61780b4e5dd8b22772210. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAEI1947456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48394e9d5bd47c5e8ddab02edbfaae88ee89bbbca52cd1f66e5cad0ffd1d4a77. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCADT1853279.
Puros Corridos Perrones Somos Cocodrilos y Que, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d65f79d7eb251e3a8b2574426d785c36c90a6e7f483a10a0b36c432843f86e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMDA71817704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268d401a9ce2feebb75f30aaf6dbf55461433ea0fa9bd83accac9bf8da85b509. 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/QMDA71817705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2653a3026bc0b318c43138a677a7095de3d9ec1964bc457dcf06fa93044f961a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMDA71817706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c38839dc4c06c6b3a0c9d7cd63e3da7fafe7dbe58cd7f36f924c5b4a68ef9b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QMDA71817707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62646a02f70731da5a6f6b96acf16a6e65e6e07d68415f84b42de97aeabbc0d. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QMDA71817708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916cf59b18efba1b20b9fc15e0a9e4e04540b34305ceb052fe5562e48ce06ea0. 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/QMDA71817709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d30f2aca2cefa1e0d0da5c8b76bd989fcea21dbdbde936f801f3daf5bcbfc49. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QMDA71817710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78ce76a4d376141dadcb8b3b5ca5f581a6c45df6140ed8d0575d7a6ee688e1b. 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/QMDA71817711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0262b0787fdde89c1a276ef803d8be8b5cdc704e15e66b080219476b9d1b09. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMDA71817712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfad78723d9a6901813c3d12ecab01f16a9f312a671833e471fa30b2996f8348. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMDA71817713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2587a4d96fe33a9f7332345659870909173fa8d067aeb03ca8132d82e8e22abf. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QMDA71817714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690aed2a5dad3aa16441d9e70c33ef0c2659bf7345a6a74a8624eeffe9a7d97c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMDA71817715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbbcd8e01477917d708432ffd7b5837929b3d947bf4ce120174e586c476752c. 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/USJTQ0901104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be4419e1f0cd45eb31db52f75a51da76b69ad3f0a7fdc307c831426e891460. 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/USJTQ0901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6fb9464bdff8f43bcef07243857647d6584917942d3e1e85e10d5303203bea. 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/USJTQ0901106.
Isidro Hernandez "El Chacal de La Sierra"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d2972e4e4514fddd63e3a570896798d42c93ea52dc77591a012b46055ceef3. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USJTQ0901108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc836fdb9a0bcad3f5fb54f07e602d7da0f3a6d1240cfb5b909c0ce9a7824176c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USJTQ0901110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce41a72125672b22fe6231561ea1e50627271694983a5768c10d658251b3830d. 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/USJTQ0901111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8069bce689b82dd988e0cfe63740dd5eb29b1b327d36393263b51b90e175540e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJTQ0901113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76dba2160e32f64766d8217300c10bb7b941e2c4df3ff6bafe8824b693808d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USJTQ0901117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fb99764eb7661f5b83e65ffe6b05de1510151c84321044c2334c56c9659237. 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/USJTQ0901125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d95138f0b3dd753e214c77fe8a768978662e125f746b2d8cf829ab6539056bc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USJTQ0901127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be7d214920468adba15dbd7a8bcde0693f7c9f42b33a81b468fba7dfe3ce707. 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/USJTQ0901130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc575627804ab7f65282877a9362f17b0c4906796401622c7f107c95f7dd84ebc. 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/QM6N21810865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8550d0261e07c7e30197e544dfa2320a828a498e4650089d08357702e438d6. 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/QM6N21810871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc1ce887855be86cd425f731ab06233e77e0c00d85916a875c4c099ebc0db19. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QM6N21810872.
Puros Estados Malandrines Con Tuba y Acordeon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974a4c06651d7bbd0f77e723e48a771fe8f6744111759529cae121ed9e398143. 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/USJTQ0900866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e6591a6abd3cde2f7a2be786af57f65c7e9203a46c08a300db7ab54a044d27. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USZZR1013138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85082cef2f7c18f357042e3d028ca5f8ea862e865e23c23ce7d419736dcd0e69. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USZZR1013142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994910e09f297f7ccd70c9300589306f0ab515e5a11163f8a1a22bbad930df26. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USZZR1013143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822f8c69091c188b480b433abde8d2fdbf15e01b483bab357edec5a29b86fbfb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USZZR1207584.