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 0x52a6b89790794fc5d564b322f32617dc853dbb00580169081b5fd140fc19f46b. 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/f6b569ab-fa80-41a4-a35d-3ea8f4e8a1e1.json and https://artists.proofprofile.net/proofs/artist/f6b569ab-fa80-41a4-a35d-3ea8f4e8a1e1.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 0x932a4a7b13853b367e3049bfa920acf0a5fce31a3d360bb0729f119ce577a52d. 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/USLZJ2016155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180aa61d8d36c7fcc4e9a101fdae9adf50c47358fcfb91c5d7b9cfb7d2d278d4. 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/USLZJ2016158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f086fd3dca7b3a4faaa5ba500349eba905b1111ae6e22d0cbf1e19b97a1a9a. 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/USLZJ2016160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edc941a24d3cd3913705e426fe2aa7a5c893c49983364f994ec79b3f2d0e50f. 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/USLZJ2016163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035f27f1bcb5f8d3587636687fb5a403bd6c9a5d224fa3e4e14f509973aad8b6. 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/USLZJ2016164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136a45ef466ed9a1b71f8dca79d97cdf94cd0192562d4cb3b56f00cf984471ed. 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/USLZJ2016166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a289bbd0cc25105f399219e808c234da3de520897d1b34c620e11800760e80. 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/USLZJ2016169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd093ac50a0e070995d04d52f71a88378d0c3aae165e562b4fd2fc6e2e540145d. 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/USLZJ2016190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b10457f2a6bd2f119de98e9d08851b14e9ddf082da2100f12f9b83f726c5f5d. 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/USLZJ2016193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ed6d3ab0b715a32c0a127f5fe497b9f9331a04f94471bfd25be8129b2d706e. 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/USLZJ2016195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7891f526073f450ec66ab8c42c44904510646ebaea50f9a6efad67173911d5c8. 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/USLZJ2016198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975752086b46bbf211878376683825adc8da999acc259a4f35bda4643b8b3ab1. 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/USLZJ2016199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac62944340a028e50a884cfe813f7c73e60510dc1c378eb6f2e8c9d9ea9b953f. 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/USLZJ2016201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a25d890ee342ba925bd905452ca4da2a4f4b105c2d54f8935fa2e11fc90475. 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/USLZJ2016202.