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 0x468ac48a51784f69187e8f22eadbe9702055eb8829576c1259349c498dc417b5. 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/6be31ae8-3b5a-47cc-9a38-303b753dac6a.json and https://artists.proofprofile.net/proofs/artist/6be31ae8-3b5a-47cc-9a38-303b753dac6a.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 0xd640a59dc305b0e403fe1c72f8a45d8015b61ad7bfbfb1447e61c32d9c9ddc1c. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/QZHN32307598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7639ca8dd8eb700e3db511d99c3f697f8239dd596e22b5a2dfc986c9ab7540b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DEXN82431953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4f8ecd339f1e1f6277521dd2d6377a15450c1ab520aecb31a7b7b29e55845. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEXN92439218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6698f98017d10425ef798f72ac6be0852b2fb45f504cf66fed5bb21113cd24. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEXO32404910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffb8bfd39a8857abca4cb470b8ccf025cbd51d22fa69a782ed10652b2d1c84f. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/DEXO12449436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4f8ecd339f1e1f6277521dd2d6377a15450c1ab520aecb31a7b7b29e55845. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEXN92439218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7639ca8dd8eb700e3db511d99c3f697f8239dd596e22b5a2dfc986c9ab7540b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEXN82431953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7639ca8dd8eb700e3db511d99c3f697f8239dd596e22b5a2dfc986c9ab7540b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEXN82431953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffb8bfd39a8857abca4cb470b8ccf025cbd51d22fa69a782ed10652b2d1c84f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEXO12449436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6e5b1941e5e2dc1ec46de89741c4de3c4884f1dcd1dd633bd7e8cc99692853. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/DEXO32431499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6698f98017d10425ef798f72ac6be0852b2fb45f504cf66fed5bb21113cd24. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEXO32404910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599de909d26e12b655cd7a66c0447ebb9786cb57133c3461a7bd07a161af1604. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEUE22532480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df6df677e354a6b0c014032740e9f871a88a230a1ab49d90254e9fcd5809d47. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEUD92525704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599de909d26e12b655cd7a66c0447ebb9786cb57133c3461a7bd07a161af1604. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/DEUE22532480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df6df677e354a6b0c014032740e9f871a88a230a1ab49d90254e9fcd5809d47. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEUD92525704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599de909d26e12b655cd7a66c0447ebb9786cb57133c3461a7bd07a161af1604. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEUE22532480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599de909d26e12b655cd7a66c0447ebb9786cb57133c3461a7bd07a161af1604. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEUE22532480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36c9739f0de0a4584a16430fd6125d0da06ac49665e0106ee392b28c95b89e7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEVU52576236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef1df15a931704d718db9d29b3c5403d87d73fe3a4fbb1b7657f92598cdaf6b. 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/DEVU52505904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df6df677e354a6b0c014032740e9f871a88a230a1ab49d90254e9fcd5809d47. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DEUD92525704.