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 0x32609d384c0b2d586c2883e95fc88c5292cfc785bb5ab632ff5819d3fcf098c3. 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/92c4c5b1-d618-45eb-b760-039e9c84ce5e.json and https://artists.proofprofile.net/proofs/artist/92c4c5b1-d618-45eb-b760-039e9c84ce5e.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 0x103d9d15bb54de4546060c450f13abbcd1aff82b902adbf5495866bbad91e06d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:29:07Z), 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/TCACZ1730518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07a1711cba6a358531c5f3f0c5a9bbd838223ad23f62d739599b6cf7b811b93. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZ8LD1910111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ba091d2539dbd4d4be6310a8918d7d2fb27db600333a926e48a8611af269e5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:32Z), 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/QZES51947757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb976d46c85103e5f841eca1f7797ff2846f3dee77b1035a9f505130976083cc. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/QZFYW1961149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666d6657c776627cc2ac3ee3ec778844ce2098248759c395adda813785585fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ31946096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e573dbc00b0b68953a8b837fd2d8d6b01f016e382bef018a4cf82a0299916. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN41978954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc928f56197b1c4e5f039ab583761bb40a350509b92eeb2049b3ae745043a5845. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ62090238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed597b6318a4c7f51056d88bcd89da45e9b0b144536b589b2ffd7dc976e6ad8d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM42K2078960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ab2038091b4432c932cd109effca5360c45472a80bf42bebe833472430aba0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNB2033454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6927411e3cfade80c1b582febd842ece3747a64e0b5ec5ce261edc21886b7bbf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:56:25Z), 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/QZHN32140203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05df99654cbcfaeec319674e2f61d04ece72bbae1cd364df162905a166fec0bc. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZTB72239938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7a72315d62cdfd43626823347213a09416e63805b257995ce5642fd3f2a23c. 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/QZNWU2375636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe936413c7095e6d729a45ccc8c50510f3fa66cf0dc976d4799ae78434a64cbc1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:57:19Z), 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/QZNWV2384701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4cd59196a3786f61a5f6a41cbe822d86f0e8ae0571de8086671c7986c6fbfb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:05Z), 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/QZFZ42443479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8948a03ed1227b5df7b800d8b922833b33b899f3c482f1dad7195249ffa345dc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFW2486694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277360231dbcbd5a713f7f3f7f19d5a1c66890e48afc7f1a6c426458d4cafa4. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZWFW2486696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf566ab93efd54422797a8bbf33655ea19403b7884be43594a79d4f7d261bf2. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZWFW2486699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d99e3eee6890f32720546c5ab2f685e53cc9e71a2d1aed5220fae762723fed. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7R2581092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69ddcd0036b6993302fa3f3a22f8a6f3699a05d02637287d593db433904b865. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ7R2581094.