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 0xec8c38d3b070a9043aefc68dc8ddd0a5589fa3a7d42bd74b650e8dbe03ea805e. 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/1a9e80af-df9f-4eb4-8c5d-81b690d15c5b.json and https://artists.proofprofile.net/proofs/artist/1a9e80af-df9f-4eb4-8c5d-81b690d15c5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Underground (From "Super Mario World") [Cover]
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 0x0db12f4fdeda9f0ecd2fa4e3537b6e1c85e7acdf8f493e11a27f10adac805448. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UK9AV2301858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89e6bc7b2446f6b57b92dfaae1a63d5f65c181824fc4ac7c50e89dd43bff1c7. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/UK9AV2301859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fce861b3caf31c11a6640f572fb3a2212f1f0e18e62379aa8d79d45cc4d0a7a. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/UK9AV2301860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb63971ac1de0712fded3c4f871409c6b3b71c0fb62a1e454de07f51478398b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK9AV2301861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01bd961c31c7b846df6416ac3e2e694a546d0139d3b5fdc854732eff2d9dc53. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/UK9AV2301862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f619c27bcf874973e761d2e5dfae209ce61505ab9e1147b74edf7a2844a27c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UK9AV2301863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8dbcb7d1faf656c90d8ea25e504c3c8f90bff7177662f0b22de38bbcb82a62. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/UK9AV2301864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268cc1fbac356ac640e1650625403d74c12b3153daeb145aa8fc491997eb88b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK9AV2301865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3bd7eef2a7f2fdd07281c9d8d2652172e05d1bdd128559fe97f3093eb5aca9. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/UK9AV2301866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de8d298f5173e26a4ecd4c27c798c77350047251aeb47235e756a7147a41931. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UK9AV2301867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f8a83b3b8d82184cf8f3ca3861f789ef818836cfb18c087533ae28a77e702d. 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/UK9AV2301868.