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 0x2299fbcd45853611d1295a51e5797448db00e372bce1dc88633352ccc9608052. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3207db11-d8f3-4b57-aba7-1bf8ec98fc0b.json and https://artists.proofprofile.net/proofs/artist/3207db11-d8f3-4b57-aba7-1bf8ec98fc0b.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 0x8ebfe875af457f6daf8063417dd8dc38b1bd613bbdd6f322b64eb5811f4fdde0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGJ1760354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebfe875af457f6daf8063417dd8dc38b1bd613bbdd6f322b64eb5811f4fdde0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USCGJ1760354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af1fb06e9f654204a6d0872ec5cd1e733283c88cdb1acf93fcb31fb353e1f60. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P1963781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf1ce2f41b7d215091433ea3942df674fc0b711217eeb39d4e5c8a9ee09f15. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2210898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240ef0fc34aab62fd42af3f50596f7437e5c841a1fe4970cb0adc1ebd23e14a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USQY51516640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d803a24d87686627e3fa31d6c663a5e67053055084816030c2aad00b5865eed. 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/DEGT81200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8a1626d0f26271af85a1ab57c90036e050f61d5b25a3c9bda83e769939375e. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GBW8L1400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb99293de37e4a21c579ac5810ec86f320faadade63a84da6549c73812d27747. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBW8L1400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28af39220f3698fc9249e6ae2bc6c1c8a0afc022162a4fdb97337c5200eba4db. 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/GBW8L1400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91790a3eaaf12ae6a91d789f999b0374672d9e419d3104934e778c48ee728f18. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBW8L1400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071aa2591bd5553b9de362835ea72f1535326b5ffe82728c99be2fd544b0c09d. 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/GBW8L1400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7ff05b3a83b21669cb90562beed2013737dcf1309a8e951ea41970cad2e58. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBW8L1400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8679eb60156f5864c34aaf25ca444f2085616057a546404b70faa95e5c6d0494. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBW8L1400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7095dcc1511f4c3c78bc5908a84c36ab517b6b9f0fb0f908195e5958b5519e19. 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/GBW8L1400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb87143b5b087a2480c25c992b62c595da3500859630421ab99bfd4bc4c8fe08. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBW8L1400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc058899a7120b8887862dc4a7f91147dcf4ebf9a782a4419e71341b556df24c3. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBW8L1400028.