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 0xdd0a9e89af0bf2d833de7b072a65bdb08f1d0942a597b1b23ed14b962f02d53e. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/280594d5-1c09-42d2-8b5b-f8dd51cdebf2.json and https://artists.proofprofile.net/proofs/artist/280594d5-1c09-42d2-8b5b-f8dd51cdebf2.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 0xf411c98baf9a78c3a49ccc4b0aaad60d2e95e60518d9304bb679ae3d0f9092f0. 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/QM6N21466980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4054ef3b46ae3b11a0ae7b4a5c1635b1f6ab1c1f32a2837b8ce51fe67763c24f. 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/QM6N21466981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e640056ad904f526e2dff40a6457f9b7034f20d7cbd649894b091e7162924d9. 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/QM6N21466982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99be845d2f866ef468bdcdde94bdf5796cf33062cd2d0821581e3a02b476d658. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6N21466979.
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 0xc7dadf720b529b36bb58bdb39c6153ca1ff93ddf678b9eaf829aa0a3455379f4. 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/QZHZ52133764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd56ec8dc09baa987ea6605182bb48240a62c3deca8d97df58fb34eeb0f46f2. 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/QZHZ52133772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec976f2c5df01b2d8c8307b2f494758849de8b99685aaec75e80dc12e9887afc. 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/QZHZ52133756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9ba196d001b89823250011f512307fec1813b8ecfc68c90828665df00650df. 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/QZHZ52133769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a05a42c8c11520e25cc0540e8772ef07aca4981189c671fe37961d35e6532b. 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/BRQC01400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292eaf39719d3366ba6e7fa106807d251b6a44f5da74a54b59e0b88b260a3d0d. 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/BRQC01400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b82b04d2b3ddfd8616b492ccf8090d12f0c46f4b3f015097971720d3be1a88. 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/BRQC01400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eaf0821c53d9a3a3d92645cc25dddc245e8ac806e1ce7499c557430725aaf0. 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/BRQC01400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc658f75288d60373b150ffd464ba1d5d1554b6f453426e614e3640bbad3bb9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRQC01400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f173dfc8fa1655e9f8b782e200fc0364f0fabc070e29d1c153923a21acdf89f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BRQC01400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe927d5d147f6c2180b694ee9de98d549cfdd2e2250f1112c83696203caea37b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRQC01400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1789ff630671d97ee2119c804cc79a0f6a8116e5a9d1614b0487a987f242c35e. 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/BRQC01400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0d6aaa41d8761487b9252c93ddef51aa6c3acbede7f3bb0bb25b00e7f736ab. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/BRQC01400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa691d61bb83a539236f546e866675ab20c24efacf22f8c64278535ab44103714. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/BRQC01400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80302d389bc49ae63abaa01c8930552db2981b4571d384487be43594bc7217f2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BRQC01400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9e885c1de687b6bc6b0b09de113614d80d63f103524017bf9251f7de8d71e9. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/BRQC01400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae9046af7c409d94f7f0527a8e7651ede7d2f66e28f3aa75ee48e9b096ac5fd. 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/QZHZ42195224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada63d71b9d5c3496f037292bdb8d0357b033d837bc673e202595d847a6bffb3. 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/QZHZ42195228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade66dafd330abaae595f739d62481af2ceee86a265281fb127496a4c903ade4. 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/QZHZ42195234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6306aec42fc67f38ed97ff05f6da664a011d086e7ad8d97ea06d022e868a73e0. 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/BX8WO2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e5f5da0fbd089e05483079d03574edcfaf4ffa855af61b5eb9b5958a811d7b. 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/BX8WO2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240bd1a131faafbb7db7b18de1f56047a4e5791a2127a06058105f42f5eca77b. 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/BX8WO2200007.