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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf24504597817630730434d220823ba93b7bcd0c3eefca0720c871ba75c1e5d0. 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/b6f8e952-8ce1-4a8b-8bf8-34a326e62daa.json and https://artists.proofprofile.net/proofs/artist/b6f8e952-8ce1-4a8b-8bf8-34a326e62daa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd297efd01f33ef673c9c0ce025251df87e620a50c59f739fcf99bbfe959c6586. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZLL92343323.
KUMBIA DEL NINTENDO (SAN GREGORIO ATZOMPA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c8e4b29dd127b58af8bc7871e68f110f1536f9688589bd6a4f92217952f70e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEV2306880.
LA KUMBIA MACARENA (MANHATTAN, SAN JOSE HUAMANTLA)
EL PASO DEL PATITO JUAN CON EL MINI CHAVITO
LA CUMBIA DE LA MEDUSA (LA ALEGRIA PUEBLA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e2c30eb9876c733e978ed5a3f4885aac942a93cc317e5a5a890b3a9bc03e5a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:39:05Z), 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/QZMWW2343258.
EA, EA LA BUENA CUMBIA (San Pablo del Monte Tlax)
BAILA CONMIGO (EN METEPEC PASEO SAN ISIDRO LABRADOR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184aa5c60810eb3dbb9b1fa71642e8740915a85db04ccac72160152c62818c7c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNMT2371828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc509164ff393c0bf797d6c0f0885bb5368681a1ed3d5ebb5e28a679383e49d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNMT2391035.
El REGRESO DEL MEDIO METRO (Vamos A Comer Esta)
CUMBIA ROBOTICA (El Exterminador Sonido Astuto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0c3da351c7e93e557d11a0ad989325f9dd0ab86b2bd06d758f7280d8448209. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNB82468598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130e344fd98426aa33e3b82775f2b89949808f6cba7ea8d990feadd3f83dec45. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:27:09Z), 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/QZNMT2467576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41417f3b71ceb7e1e7c9e94a721b99fb10c27b799523e19f91eb44a0ca7ef50. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZNMU2491893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da1c525a9ef3d71475e9343e5ae580a3bcdc19bf6dc7132a40c13d9b9212b45. 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/QZTVM2473886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1164c1d8f1e74b73bd4dc8cbe3ade26ec9fcdedb5019d0726eafa4aa0de7e8. 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/QZTVM2488532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6208f1fe319aa5eb9472ef7208942af09a003776164746927e2cc92885d4c7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTVM2495446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94f50f40607ff62c864d1e8137610655ade5fa32ad7eb2e9e0a49c002d38138. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:11:13Z), 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/QZW9K2419635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6c5e26251805aaac7c1a3e221d89925ff0eb78497f739f2ef29b714dec0613. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZW9K2434335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287e9e706c4d925a0aedf02decc98dfb543723279d39a005410cedc4d8636e92. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZW9L2442408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52abec67cb726af71b5d97cd34c2c9ca3f28e73c340a50fae1f290a8c76bcf79. 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/QZW9L2469783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccca475c7b16ca23ce4a149af586b03e1f9c9d396c29fde3c01d1950f555f4ce. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/US7VG2556816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed649e8695df080aed68cacc7462eef8996e93a74d11eb4536cf197b1c30ce36. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/US7VG2553449.