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 0x7d54753a399b96c688d7098bf2921aa7efd06bf695c7980a6e43373b37816a4a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73ef069e-7876-4258-b684-da0bd186ea1b.json and https://artists.proofprofile.net/proofs/artist/73ef069e-7876-4258-b684-da0bd186ea1b.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 0x693f70120f1161cb556d26c9278570eda140e6e8f38d707b804d70bea83fa37c. 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/BRAPD0300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874f89552ffd317705ae0de322e8815c14791ecc455b994c096e45a6f09a02af. 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/BRAPD0300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0166b320afa71aba2b43449032e58cbcf8ac9c43b0326371fff31fd0861d0317. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRAPD0300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eb310226066a92d73b37eae31b5a332a3cf158b8c183ceb26928631cd71d64. 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/BRAPD0300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721d916dce0f7c4a376743d2981c5c10c3e5ab561ef2c3e7a967ac0e8b0c35d2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BRAPD0300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc500f3564ff497cceb54d1abdef29ccf34690611a5c966c5a49cef8980952b6d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRAPD0300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9610783fcd325ba7f799fa984aecdc24f56a6a08c837c9a107237d06df324caf. 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/BRAPD0300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc553ba42950e238385cdd64570703f32e7875629bf5d25af6471951f1f972f5f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRAPD0300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce4aac4f7ed625174aed05b650d442207c1d82f1512b0ece7a769039a974e0c. 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/BRAPD0300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54fb81fde6e9cbfa6e376ecb0c4e9b5c9d2d7bcc4e5ee3fb72f6d9b10d8a7f8. 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/BRAPD0300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4209cb01e33627414b1022d54e884dc02a5d61b92b847344d433cf6c7663f7c8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRAPD0300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa64878446062d2b2d81f9daf3d2328a28f5cc40b19e793d95f8710750c585d2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRAPD0300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ce9487e6a2f60dd566addec0bcb0b98c5269715ae0d161c5e370442f60ab97. 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/BRAPD0300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63054892901e7df2328c38978db6954552f587849a195905322248097a955ab. 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/BRAPD0300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162b5c49b83812612c3251aa391ed2883b5df02407067edc50e382261004ce6c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BRAPD0300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6f57f18b52ed46c21e126f7f11394fcc49a83badda7595cdf6be48ac9184da. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/BRAPD0300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6321a66556d906b8327e5f283b0c2ef3900ad6861aa6e0e757ac3e66e6303e0. 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/BRAPD0300127.