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 0xe6d0b151433ee05c784c6eaa9d16b314b26305a1faf08ddee2662a782862a272. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fb21570-92c1-47da-bd48-8ee3665669b4.json and https://artists.proofprofile.net/proofs/artist/1fb21570-92c1-47da-bd48-8ee3665669b4.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 0xe6e9c7a517ea7d0accdcce7bb9dd07843bf37883fa8bd42dfc91f79b0a190d9a. 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/NLT2H2400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7d5d57be2e2af1137c76e11782fc449345c6caf26785e54a1df6811adf6287. 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/NLT2H2400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88827d38de513f731f467cad248faf7778f5d5632968dc7904b3746f43be1021. 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/NLT2H2400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9358b2496bf991c469f853d87895487936ed7323b720693cb05df928c3bd76. 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/NLT2H2400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dea75f0dadfb2494ea074e6bebe59779b27a0af2607e682639261bbaf887a0f. 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/NLT2H2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ee1ac418826db7ea372792ae569ea422e49b3d7afc663ad3368f4dd6da6a37. 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/NLT2H2401523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d62511265f792757598be9a3bf8d6e1fa3f6867d6d9e7cf484255babaf23300. 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/NLT2H2500309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acf1a1eb5da5eaab30a6a3f1f33c6306dd2b4543eb23290e510814a61d5be19. 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/NLT2H2500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb7398d8114ca79c5ed0585683823dd480789f60103092a9ab3075bfa03e75a. 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/NLT2H2401271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ad216ca31969d8158216c320b6455780e9055613bcf2a76129b29beb7c35d6. 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/NLT2H2401156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac7955596d6da3484b142fb4e30f7140cb785adf50eb1fc0a021f6640022ef6. 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/NLT2H2401142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b5c2adca707847121bfe29b50d19fedf061dd80fcb42460601c5aa4cc42db1. 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/NLT2H2401026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734455eee33ede06a3188a40d1162835b00669ea0259cddc7cf02007ec68b056. 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/NLT2H2400959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e75d26c6e6f0a5675603930420491666802dcd0dec204807bc31f417299261. 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/NLT2H2400899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf357c6c1bd4be4fa30e03b16cae5860fe0b08a962cd96ab66ed259b6bce6f3fd. 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/NLT2H2400818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf594833862dbda11473bf8226c2cffec6d46d843d91726b31ec80f71f92c49b5. 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/NLT2H2400749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a5c6709e10e070305fa5b7dabcb7a4f228ad89e067413e245c8d2494664e62. 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/NLT2H2500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd07698acd783e1af80007321471b6d9f3e890005b2478c0b244cc8a413c2d6c. 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/NLT2H2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df22bd5dac9a508c8f1ce6bce36ababc5b4efe23c413d9c36aef030e74a8cad. 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/NLT2H2401731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890d281a8e300fab84fb1f9f2ac4ed8f8adc6a88f4f3759860b2d0cc87e26d9. 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/NLT2H2401230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9d168609049f4a386c410c42a20ee47422e736a70e4307c22114732e668c40. 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/NLT2H2401076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265ae5f2df99bf7de3656f2253b1b26946e27ed34fb6c2782eb9de88e1d366c2. 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/NLT2H2400995.