thumb|Chico Trujillo at Rudolstadt-Festival 2018 Chico Trujillo are a Chilean New cumbia band merging cumbia, ska, reggae and rock, among other styles. The band formed in 1999 in Villa Alemana, Zona
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 0x3a70316a87b2e734f864bf706ad63cae9afc5bf8466b0d7e3d79ee5b503bd691. 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/6832e071-d632-4848-bbfb-aa5183425fb5.json and https://artists.proofprofile.net/proofs/artist/6832e071-d632-4848-bbfb-aa5183425fb5.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 0x2ce69c2eb1c7c912f193070d2d4e95ffc72387d17dd226eda077a0e1a077cf08. 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/QZNJZ2332155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c8eb7362ec4a968a1bd2b3fa29d113ed255c8df1a36f3c3d1da54f10ae6725. 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/ES71G2142514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5d6397b8e16372325fdbde05ff131869522314b245d29de0b9809c6840d32f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2142515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7333e5de606f2c296182ae48953de22c8668caa85cd4020403dc39313a7b09b. 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/ES71G2142516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedb74ebed8d267130268bc9380d8bcaaa20a1aa2c90cb98cd21307fedb13712. 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/ES71G2142517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40afe95ebde891f68125dc3b034402cf31651f8d1c26fb43f00ac752b0a5d9d. 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/ES71G2142520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a31ee756d44b7b433ed95a29f2aa6b082f8ec151766f84ad1b6f28aabd8135c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES71G2142518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbe40cbf1ba607083d2b03c0482d9dd0f27980f7a3163e164019ce6391e79dd. 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/ES71G2142519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2082a0a42f29c4a3984cd7dbbb7d6679e807ded4ef93cc66016536537b11c9d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2142521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65c4c5dc1ee4bf7644008b3c8057c6a390b8adba821edd8437952745eef5de8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2142522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89730c1d5ccf055382f26db64b462b3f56cc524717709365cb6ca997caa205f3. 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/ES71G2142523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2032ccfb41b3e108c81eb75428ff2c23e1bc0b3d22564643c5d1800b45203440. 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/ES71G2411146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248c341e48e0ce39899013c9d472f6f46f42ba0d4c9502a835b486739fd0d70a. 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/ES71G2325910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2048431091ad3eaa1a6550a680ed63be36bb7ba09c105b037b55c7d35ba7f8. 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/ES71G2225291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c614cde385a656753a73a72e4ba9fe24b72fa0796065d0d4311491a6a5e4d0c. 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/ES71G2134261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7475480df5fd3e3d6c528366865a8d4aa1887c1bb84ca07e43c0352984399acf. 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/ES71G2049184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27864024c488e0f3ae989ca440c270cd6d8a34fc4306e8e9595c11a52127cc53. 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/MX1722301722.