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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c461311dd7a9f7369066d11daef32c350e430dd355503313cf56c2b65a640f4. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03423cce-bb81-4276-881f-4a5bb9f61b7d.json and https://artists.proofprofile.net/proofs/artist/03423cce-bb81-4276-881f-4a5bb9f61b7d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6bfd22c9ebe01f1fa895638cddd18ff9bdc87b403ee1adf009f6f76301e01a. 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/QMFMF1403849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c7358704082daf3b42e4fc436699abb4cd248152402ab10ec47df8399c481. 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/QMFMF1403852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3531b3eb640c7167a73d89f5b10b58b6cd9edccf365e5432d5635a668b72766a. 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/QMFMF1403859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8165ac89e93917a55079a05fec1ef65bf23e0857a93f68a19037de30ca10bd3. 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/QMFMF1403861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75829794ed3f67443d2e40d6947c967600b83769bab730486d79b0c16eebf31. 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/QMFMF1403863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31612f246922ed3e18d6f4b2ebfa2a009801c842f7e19826084ac25d1459484. 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/LVC100800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257421d42ba702b702c74a302988e03603bf53aba74b34e7990057c4fc616d57. 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/LVC100800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19c692a72f15e0904724c9aa3fd7f7a4286e52563101de689274f544df254ca. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/LVC100800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad7c2607e9e4cc07781ff89308c523dde6bc67580f7924eea567e96ba6e2b09. 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/LVA109600098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fef74be68296ec2466c4880730e8857f6e9adc2860751dac958c9b44d08ee41. 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/LVA100200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d474392aed8791ba9dd184be740a68366a83bacbe3852e111b5abed36019b8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVA100200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2addddb0530df127dda5bf5b116e79a1a04b888681ebb65d5f7c53c5ab0a03. 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/LVA100200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee18946ebb7351bbcdfa0a96c0bf2d77c50294acbdecfae20f787b1c81d46f3. 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/LVA100200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298f1b097a38e9c44aca6585d45da5f20705e9de62d002919101fca6a4eaa535. 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/QM7281496550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00a3ccefe77d9386f282b7e2386e5c4035c608977b619e828af8d80d9b2c514. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM7281496551.
Dzīvīte, dzīvīte - Mans draugs nenopietns cilvēks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf8cdc2bea96c682a21c20a0981d5af09e2ffd3c35ad65abe0563cfff93e978. 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/QM6P41710138.