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 0x6a9d4e1c4074afeef3f5dcc168dac9031faf059b466587140f4a350dc3401156. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70c876a7-a69b-4beb-bfee-9dcbb71f225d.json and https://artists.proofprofile.net/proofs/artist/70c876a7-a69b-4beb-bfee-9dcbb71f225d.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 0x2d74771bb1a90ab54ce144c2018da1680cd3cf6a87fe291c0a0c40eb5bb99cd3. 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/UYB142018303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f60a9723c591409f57a32e461e728b8902b5117d3cdee87b965d48d083e21. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UYB142018307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f5fa4ba862ffd5d15b3601202143efa9e1fb8269e7d86bfe3b9b42d7c9c844. 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/UYB142018308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddcabb1be937f058c3e6a0d2f5700b8f5c22406e14c79adbfbb18771fa4c468. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UYB140707203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57005f22c311fd20bbe7a250890fbb0d91523cc0fdfcc1cd802533a273a6f564. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UYB140707204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf94945239d5449988f9f466be52a811323558c443e4ae28b5495a32914a4396. 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/UYB140707206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfb0b4d17fe19e42f2f6b739763571425b08d2104115982f1df585c167a38e9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/UYB140707218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582d2d3a83666a2e8686caeb7a7bc24d3c62d7b8132ea2f7d78638330edd6491. 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/UYB142016401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f6c3527ee7ee078fdf262a00316e6945f0511b6fff77f3b6d81c6c7e7bbf4f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UYB142016402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9cec191a405ce72c8d0962f29f9f5e47bda558033fbe653092e07a5d32748a. 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/UYB142016403.
Presentación 1993 - Curtidores de Hongos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382065f161b22a8368a159ddced96d2259b32f68a32c1f30a751e8d53abb8d0d. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/UYB142016404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8773433ab7d4332d1f6f21bf1ed7c62a6b0881adbb221edac7ec276fd1279268. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UYB142016405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2db63d0ef91bda93a8fd12e4616af8e13cf6633a65c52fc2bcb599bbf899fb. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UYB142016406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88d1a102c5537818b72def33d72cafefbaabce66ade24b28bbcd8ae748b60e2. 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/UYB142016408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6536070e3466ca713ea1d54bb9a29e0b6224974fe8bb525608d536a3afc77d4. 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/UYB142016409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900da90b288d72ec85af779075c9503808252e2f9e5490cbd4172cd84123a699. 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/UYB142016410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa487dd48751781d688b1351ad618538b2f840a65568f0236f58a0de9b46e72. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/UYB142016412.