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 0x54dd438faa74ab9e0f07fb560a38e2756a598f5a132aefa4684ea1eddc60b28d. 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/c644635d-8a4a-4c34-8fef-c8f373936e21.json and https://artists.proofprofile.net/proofs/artist/c644635d-8a4a-4c34-8fef-c8f373936e21.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 0xeb60f738e67dc86c7ddc5ae669c6b10a598d29bb2dbae2a6f395ae894a807b43. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CH6542427756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cad89753552ee64b29bc34bb2cadd022cf4bdb06a45e732e4088e1b537e139. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CH6542427757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb200245665531e7da8f37e2c1c226757ad75f5c4e61c4a641d64c49074e03769. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:13:41Z), 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/NLCK42419191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0ae4e882ea8b22fc8ef807867fef458823f98690adca13acc980efc548aab2. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:19Z), 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/FR10S2548047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe2237972d83f56e6a33e7f8108bac2a6f713354e0dc1555dc7ad78600d267a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR10S2548045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde643a6a3009bd37355c5be1c94402e5188cdd922250bbe49e6912eb0c387609. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR10S2548046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0ae4e882ea8b22fc8ef807867fef458823f98690adca13acc980efc548aab2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:42Z), 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/FR10S2548047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce083528d44856f01e7c5a37439fbf36d1c3fb196e277ee94e23d6912c95f7be. 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/FR2X42544299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8ae11d821f1f92254b27957a1b85e1d844c00b30fc430efe78de06decf79ce. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR2X42544300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0f6d05bf82f77028af39379e1defafe8fb796bc27c1853d3a7492f7c436247. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRR642400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfd002db2c4355d1d9444519653329a4222951c866ebb48f44e865c056d5826. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRR642400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf0e83119ca8a3fec80e4b5e8c29af71f227182cf7a5db30e1eaaec52c0888c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52256336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374c0e8ee3d8026c88e2315a7515d2a8d52cc062f9b71b804f00a0c36b86e5b3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEPI82326403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a4ce0d316351469ca7be6c46b19e091ce148acc44052687a89e0614a229f26. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:59Z), 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/QZFP52417070.
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