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 0x08ac07d8788edd8d42cef14ee40c9b404f0c92fdba91dc02679a603116e57b29. 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/3e51e26c-a2dd-4e94-9aae-35105fbebf35.json and https://artists.proofprofile.net/proofs/artist/3e51e26c-a2dd-4e94-9aae-35105fbebf35.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 0x4a7c150738b1b01864e908836e089579b194d9b1f64ea53e79860d3427f90d4c. 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/ESA012405690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffed93a23f8212afd3a0d30d8701b776f5d5c021022984c7dd2d13394808ca1. 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/DGA092375651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ee167668164004a25e748a14763496caf60b73f6c20393e89f1a774abb30b0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA0H2415095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2688517d1e7e36249d13aebaa6bd3cef902f5b44528a08dff5eaa50e916b1. 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/DGA0H2493548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed15238d3748d0a637e02092a19aed772081c77af7e7f1e705ef3db6e2047f6a. 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/DGA092473081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb805aff877408af45712308c01afec646eadbaaeaa4148fd47ee6997207513ed. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX762467025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90691a09a8e469e153d9960aa81328235b68d04a7d768a8fd7360922be661d41. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX762435753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ad0d795961968c80257f0c88680ec7aa8ad7c5dc8378065b1a38b2a5cb33ca. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FRX202454731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53393656aa397fa7d441a41cf5f893126dd2344811d0298d11e639ec8d91d1b3. 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/FR96X2476650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d73a886f960fb01da54beb4fe060424ba3676e9338a7925220f1cf1de2643. 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/FR59R2479443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ee64bf69206b88975db5e02446691585d3699bb380ae21be16a11c1861c68. 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/DGA0P2383635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9275a86c54d139fe4ec5465a89c972efc63ef13a5279804c0baa64148a87bc0. 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/DGA082377648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3816a32b527927b15edc164dfa6210b2d132b61dc4984a4af2c4b63f8e566cef. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA062303896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87fea2b5e9b45ebc88615e96d5616a6a6b017758df9eefa215c9bb5e8dec0ad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR10S2588390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06281e11ee80880d2a416954c97be675121608a5dc2caedc4650422ae229ebd2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR10S2588391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dbe7491ef4e1443fe3f2a28e6c9316bb6bb401c8dec6a91e6fa22f7fc57c72. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA0R2476920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8b307ed128747f22005791cc82a6ae8abc0594deb91879285ac5f14d8a2de8. 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/DGA0R2485684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194a99c12c1a1f9fa80748be4ee1d8a4ef424db4db813d2644036db94013806f. 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/DGA0P2467765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3202b57e0d096402c7f77eb4aadd0fc4fe68266c05858240f164c3b9d22e73a. 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/DGA0P2467768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55a171f1515776511ee0498f929fb71cc6a8add3050e6993adf8f550fa7bcd3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA0P2467766.
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 0xf13adfff75cb244599e7a90e002d9455b96353ebdc703594c2ed05f068e71780. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DGA0P2467767.