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 0xd7274d952284f4ea8e45eddd9a5f47e1e0146bc9bd1e87c479208e4bee39fcdd. 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/97a6f8f8-725b-408f-b0b5-06df2f74cdf6.json and https://artists.proofprofile.net/proofs/artist/97a6f8f8-725b-408f-b0b5-06df2f74cdf6.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 0x2953b55eb0c436317a1e088412f7bcbc01fb693527b8d23535ea8d8e492bd010. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM82J1400000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccfe7dfbc43b00523d9592c7fd5f18d505a928c381a893ca5eef5187ca0b5e5. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QM82J1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0ad0071b60a9b5b3f542cf074290c65a116cd8f484403a277e843f0cfa7c83. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM82J1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d28251a7880bbe026bc9ef3bdcfdcd59b4eeb69fce13deebc7043e7aff6ab39. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM82J1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d2c5c1dc520fe42b3c747ad6d1b0c222ba6b406793715acebb1b1626d52cb6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM82J1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b1ccdd2f478e1725dfe75261a2f3a540d96f388295ce5ae03cca05a2f25c68. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM82J1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa509173e48e680dd1ddd2a653a83a9c3f450318be23e73182744cbd4059e9e73. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM82J1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e2ba72c001d583b8d08701e6485686c649887c3759a6170813a64273ce1228. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM82J1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad76a80e451fa55cac88b5be8fa45269ae8b63ca28371bbc24f68769832fea8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM82J1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee88b05284feada526ee01d4317bc0c9206e68e25ef286cc6f28b464748a7f7. 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/QM82J1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ea33263a785b7aaa537b7b528a269c05e8a3ebdda4d495e531dc47e1d9bd0e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM82J1900000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80eaec97df479b88a46197546037abdb7f4cbd5e85e232bb7530a337f73bf51. 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/CAN112301160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbfc7f20dae594ca7254fec3a7a09223e12af3b223e653ce595ad0616a3c2cf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAN112300955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c69eace72652a290160ffa1eb89e99affc4df815ce29f31326f3913a57c246. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAN112301161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb8f8f134ef5ac3cb4012b41f1ca3992ef9d704255fe011241ac0e999d6076. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/CAN112301162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43608063c6e98a016a6105e383bb5ed1fde06ac8bc77886df452fc79df3f897. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAN112300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5803dccf2627252b3b66b990b7f3c18f134763758190d11000c127152eaa3710. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/CAN112301088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220bcc8f5f281f29d95ca586bb3a3a93da66145aee492f010baf6a1b3263d4d1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAN112301163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda383b63a4e6e64b0d95e8e06203aabb3d95157fa110f4bb784da0ec4b2ac2d7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CAN112300689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909d91335cbecf671698399390bef3d1ab0e094d2eb81f0bbec9e1cf39961c2b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CAN112301165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af6b1c94b951aa1bad4dd913d1b2b7e79bfd671f401efb1accf91b740ed82dc. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CAN112301166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b5146d3fbe9e72cf31d76893b20187bd0dd6536ce2bb070a8ea44503fdd363. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CAN112400433.