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 0x8daa702f4a53633cf82fcb5449555b122f68a44f84a6f1915ab987e382900217. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7e011f0-88c8-4f42-88ba-6966b4112535.json and https://artists.proofprofile.net/proofs/artist/e7e011f0-88c8-4f42-88ba-6966b4112535.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 0x57e68d2d784ff206515f6d6ebf20437035c2b655b3de35d20c6345f866bcd9af. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZDQH2417612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db5a6f834c2d2e180bdaaa92bb5fa0ce66efe9eece91c3f5c910fe5e7e24233. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:57Z), 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/QZDQH2439144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1db8c1aec4b7107920168174ed9a9422f787ecb9dca34568e668bd5c38ce18. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:04:15Z), 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/QZDQH2439146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5df281426214781b1ff1bed38c3adf1b245ac10e1d200def6a9e5da68a31e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDQH2439147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4681b44b599fdebdd087f888c233e9885fa04de2956ef10046315d4e02aac62. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDQH2439148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ebf9d8972073e7da4b213ae9856c79c5a9af6c3d664c0db55281028331bf7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:06Z), 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/QZDQH2439149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4eaecf02c6e925a74c71915e9adc1bc836956cfc06e8f11f1f39679780802. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZDQH2439150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fd5875110869cebdea2f48080ed9881dec665c8f56d0ed9276d199a420815a. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:42Z), 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/QZDQH2439151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a7dafcfafadf08aaecdbcc1d47296940649645d732935bb5bd2a574043c3ed. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:19:52Z), 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/QZDQH2439152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7a3d698646248071cc9383e827d0351f675c23080418faff8759a5b82e18c8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZDQH2439153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5948e28aea0456fcabc7b6d6acb6117455c9d0b1ffbf301e945603d24065fbc3. 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/QZDQH2439154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d03dc403b19eff10097e71702205099cde31dbbf1a05790708eec976d904b5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:44Z), 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/QZDQH2439155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4616bfda5d1d01703e30c20c7648b060fbaf7626dffb0ca484408cc2e3c5dc66. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:56Z), 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/QZDQH2507296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c89783d23d5ec83e8928c895cebdf91a0e4ba1951b0b78dd86c0b60bcfd6c6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDQH2533413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879d78872ecb4f5d084f01c3857019844fb5843f1ebcc0615fce2989eda83559. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZDQH2533414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d203dee828c0b1693e9dc5508d341cd55f7e853843f53eeafc914ec726d7f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDQH2533415.