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 0xe433af6e8c52bdaa279a88c26df520da5a52f6cabbc414a134027f3767bcc479. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0285c348-0aa1-450c-a7d1-144d7d1f9a81.json and https://artists.proofprofile.net/proofs/artist/0285c348-0aa1-450c-a7d1-144d7d1f9a81.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 0x3e946340957a098eda00f7681bd6d32c8d6569f1898513d95098d433026b2df3. 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/USHM22125914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4585282abba35fd810cb4dd8cc2a3859f843ac311fc1dbe14313e85f358f427. 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/USHM22125922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dbb60676da860b2cac2e9b0130125e9d91783efad9e79ef5923b259698762e. 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/USHM22125927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30677dc9a32e1748ac817d978503cef411f41b0c13b870ec0887ae2f2c03a4e4. 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/QM6MZ1824505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22368df40b8cdc2ea33d22cec262e53c68eac4af5c215221c77326dbec666025. 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/QM6MZ1824506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b57ac45f38deff4254bc77196be402a222f28a6eb745e4a54f30d180d2f640. 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/QM6MZ1824507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f36e0f04fd8242591df8e802439a296a9842e6c471917513ae8a0df8468d07. 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/QM6MZ1824508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a97e44928ca4cc6313e481691744fb8f1e64ca193c97ca3dbb289a43483951. 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/QM6MZ1824511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f5718e693d3792130cdcd68b4c6717d7387021e450fba9577d4f92f0be5002. 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/QM6MZ1824513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb40ba96a3ec4823b43e9b91a1cf161726558cccfdf02045964ffe5bd19c897. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM6MZ1824514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b0e69fed231f338aa0c493fdffba9e922ba740d097d8bf465fcb41fd7f1b12. 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/QM6MZ1824515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511b977c2c2f4c5f003cc93f39284641265a41e07d4abd7700848bbe84f9048a. 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/QM6MZ1824518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28508a6af30d35e53cc8fe295fe2c0fe8acf8bbafca70643f6e2f365063df188. 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/USHM22173387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8180f989b0142146684a703849453f11181252ecc1538fa9341b4e07de4c46ef. 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/USCGH1911206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2b7858c3f8de288228483038195a61a05eed8509a3d72fb1f9b27154903c0e. 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/USCGH1911207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19e5c21c302ba9012baa6ef360a6350f5227296df28a2b470d7a1f646ceb669. 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/USCGH1911208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccbfb466652637ab7364ec45f04d2045702a6decbb8bd9e7828e5621a5f217c. 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/USCGH1911209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb95efbf9e58dcc81994022075144a8222ad89c6465b784d5175487cde8ed5c5. 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/USCGH1911212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe993e67dadddce204e0131019cc7f6df2969f3955c3c141fefd45c2f5af600c. 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/USCGH1911213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2add137602678a4c708d980067bdb388de17bd7eeb11098167521f432f2d06. 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/USCGH1911214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3eaf5cc9fc4a02cc30cf72348f1f584f4e4b99f2e08a8f196990ee8e686a01. 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/USCGH1911216.
Rap Chileno el Sur Es Hardcore Godlevel Enfermos del Rap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa70bca49ca8df551f4475103564998c621168e8b34fc655fb68344e07a27d96. 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/TCACH1535376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6e3e8f6266d1812b153b85a129c554b95de4bd23a8f128fa99b69bb8fd3826. 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/TCACH1535379.
El Sur Es Hardcore la Venganza de los Mcs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea217c0a75ff5f5fea89e014c7b495b69935b8671b96f3d588b0764b42232dd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACH1535383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e6339e5f9aba52922d4ee07f792a4137eed2544e12257406ee1df3ad553381. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACH1535407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fc0954599c19e57a7fdca7c9a99c242be8eb222f5368256700bfdd98d70720. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCACH1535386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3a48d6cd1daf145413175fbc599bfe61b68851ae1e0204520beebf8709e0b9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACH1535389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba09c629c0e34df66c16c378e47ffae7963cfe1698a0df87349d51a3f320cfe. 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/TCACH1535390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636b5518e2165848e3488700598a98f3bfe7b26412aa5d99dc6098eb36738586. 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/TCACH1535406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fb45f634e8ddc27eee601a9a7ce8e98c934714f7a1c9109659aa33e482a8d2. 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/TCACH1535409.
Enfermos del Rap la Enfermedad Se Propaga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f1c0a1a7df50aed863285472b5d3095c10c9503b0067e7351c361efe8d0bcc. 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/TCACH1535411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2f6d22821d3c416a900dc231a712447797b67dd0b18b8a1109e7ee1b3b837d. 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/TCACH1535412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393478cfd9c92e5d940d901fb723932e31a950ea4755b85aa0ffd51400bf2e4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACH1536596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f39981cac7b7cbe03e81a5a208f0a16035072117cf619aefd4157ccdfc00fd. 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/QZNJX2383467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81964697b9454a7cf8d714a893c614b29da2c59d2b0572243f4ec4ffd15df28b. 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/QZNJZ2337439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043b07181ec8811203170d2ac889989a8b427e0ad7a9f03e687fcd711cf42325. 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/QZNJZ2337444.