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 0x30faef8199631380a2f1c9b93ec6c8e8b13013b62e64f5d753b521ae3c018a2d. 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/e5c5462f-cf8a-4813-8124-dc887c189d1f.json and https://artists.proofprofile.net/proofs/artist/e5c5462f-cf8a-4813-8124-dc887c189d1f.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 0x62cf61de0829c3fe7d87888bbc06ee716fe43813d63f06fd8e9e7b29606c57b6. 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/BRM3E1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412788018ba8ae4541ef39c5c83fda5e2a626916b0a5eef2262b242c068bed53. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:03Z), 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/BR3442000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae3a505d5a93de116d135bd314900b4891fde8d681f2b84864924198c1af601. 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/BR3442000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f1b9924af7e8bc384142f9f18bd5758d43a32ff5dfb0b06c8120c264d5f480. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:35:13Z), 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/GBZG92400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0e91110ce2c71f9db8d1601516b2469781009d48d70cacc1bac869f8c4061c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBZG92400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1057ee6e584a4e69e96edc1109571794580121ef841ca8b944377b48015216. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBZG92400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9446594909fe0a7d713cf19f3c51dc26f0c734bdec1fb684410a0e0889539f8e. 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/GBZG92400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f1b9924af7e8bc384142f9f18bd5758d43a32ff5dfb0b06c8120c264d5f480. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/GBZG92400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89253a328f391a6fcab0866e3e78d9b82068872b9a700dd6dc52ca4ec5525baa. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBZG92400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f75681f8b617003bf3d5e5209e7b586c9ee16ced651aba8a855bc9092f5442. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBZG92400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150b79eb92bac002a31e30e3b862f3d139b2a8582f3c8fbe075c1294592a3804. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBZG92400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8596dbc8c8708ebb0748fe9362f524f49decc7d34c7ce0730df7f1a612f00036. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/JPW462563768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056d8aa0a243769acdad37f53d46318c65527b8f8ed80e6235c1f957b0cf277. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRUM71200893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c16cf55c0e4c71bfd7d5968df3cd7a647d4c54f8cacb6e6a51bdabd77b5e9af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRTRB1743604.