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 0x0198a8189f4cdb50cccf1966670ded0cf64856059e29f762dd8ee39dce739e20. 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/fc5f7ff2-76d4-490f-88eb-5457f0728aeb.json and https://artists.proofprofile.net/proofs/artist/fc5f7ff2-76d4-490f-88eb-5457f0728aeb.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 0xe5a25beb1defbe3ac710f315d9a3747f07864b397a02a1d600f573141dfa06b8. 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/FIHZP1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d33ce7b8d098a81788123ad4f69b2a4c27751c5e13f120b2a22daeaef700f82. 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/FIHZP1200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88638053ebc8dc256f398c53fdede22cdd987217aec3503e2948d0aebc76ff8d. 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/FIHZP1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8ece073f07ecdaa0b23233cca672dfef39fc65f412cbeaae424ea513e77a60. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FIHZP1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb0b5be9e9b93c4c27bc6263f5f02649f07b24aa312e1bcad45776ae0b83fec. 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/FIHZP1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa40f5a7764c4375eabd9088fa696cde2f72000b0ba414f3875454ad16e87bf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FISFS0600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1872b0bed7b01613827647b63fc9e9e402357cda0b5b821c493a270295509db. 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/FISFS0600121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a7ac0b27522caa71e773d23a425dd9571195b0a24c65653b024424ff1e6f6c. 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/FISFS0600122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73eb0483b6d6b4dc50be6e3d06eebb68501ad5f9c5921649ba992c5f70dbcacf. 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/FISFS0600123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd2339cf3dd69ba6f3a5f615f882b50e1915cebe0d521b80c9502c46d6ab369. 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/FISFS0600124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6829c806bda233f49f470d7b7ad4d5ab11fe379cf03675f239f84ffe7584f97. 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/FISFS0600125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f5e120f359ebd836e9a5467c223048ee23173166550e8a7f73c6a570ceb464. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FISFS0600126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae7aff3f09f33a03c535a7a7096da0c58fffaae27210e88e3549527538b9a23. 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/FISFS0600127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967bb0facc634d12bb2aae68f589c5d1b61dab445b180be79c7bbfc78ad553cf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FISFS0600128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fec5ba7c0b2dc7f5397f653e148090de31326de3d8f7a94ad90d7b2c82738a. 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/FIUM71301149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885d7a99ac3dc346b95bf384eaf54a79a3d137debe7ec56edc4f7432435e0ed7. 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/FIUM71301144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448156519ae6f48f60f2b784e12f4aa60b193cf5c0895cb35785230f7ce8857f. 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/FIUM71301150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb77ebdad31a5124755f433615a12889dbb1323cd6c538e4436995d871157878. 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/FIUM71301147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a1a9d740f55c0645f8087dbe872ed33fb88481fe2f40f3730db1be79aab4b9. 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/FIUM71301152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6508e41a944647b63f784e6777c1c656210fa1757eda65e80dc2ae23a013ee. 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/FIUM71301146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8e1d78e14c37c432d0fc6882ca612a910c112841fb6fc06e0f9dab0d6d5efb. 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/FIHZP1200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf27b5fa8f6c1996c714ef6c40fc2b63b7ce925e4aa41a3b5f0c57060a6b0b6. 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/FIHZP1200036.