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 0xf13dae1daa313549e5cb09be5f7ad95a196991e29ce0632bba0969ac4eb158b2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff4a2934-9471-4b75-9f85-386cefe6b058.json and https://artists.proofprofile.net/proofs/artist/ff4a2934-9471-4b75-9f85-386cefe6b058.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 0x6f7e9120e3369b3e33b7b84cdf00fdc86c8c5b18f0aec1a74a0429c82d8ce0f1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US2Y30605525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf18357790d6557b25cc720d589fa4c72a98b1e684c145fa7088f75b11d7392. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:35:45Z), 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/US2Y30605526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90d3d1c1fba43f95eda9bba7f443d2a4625cf3382e578feca8cfda4f566f263. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/US2Y30605528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a625bf471bc043085d68fb1fc59a8de149ee97e0cc71b612eb3713eb6776270. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/US2Y30605529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcf4d4e3880c3d11f0bc568cc6faf5c79be0e7b4127401c5d1b47db760276be. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:52Z), 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/US2Y30605530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d42fb77df89dc800f046ab367bba242828fc0d5cb7547ce4e544489a3b820e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US2Y30605531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6955d6e054135f675d6bef9d7416f9c8eb795bbd68e284d20d89ce2d636bfe. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US2Y30758512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f976a3f6cfbd6bd12cd4597b7b5169110d27fd6b9a35a48ba270148ec70072. 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/US2Y30758513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa823ff90ef9d6cc5480f6934b5c1a752fe2b8000b1156f1fa7ab16be796edf47. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:45:26Z), 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/US2Y30758514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba849d544dec376575c5e3a324b00c78183c25c836e98ef8dc9d536c02757e5. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/US2Y30758516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad0c096f161c2d16c5cc9048da095927a67d416e5dacba5bbd692000e50d6f1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:43Z), 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/US2Y30758518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf630b8a262ee716d6edbecbfd90f0e9420fc162900f43f3a2fccdcd864a6c77e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:09:46Z), 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/US2Y30758519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabf641e1c7720f2a121d519beb9c8d9d8c41540a87405d67fdc53fb44732757. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:41:26Z), 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/US2Y30758522.