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 0x8de5eea7eba27e27568723b192b29cdb77b66270aa13f60aaf43fb19c0409c96. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52897ea4-1851-4b19-aac8-f622fba75492.json and https://artists.proofprofile.net/proofs/artist/52897ea4-1851-4b19-aac8-f622fba75492.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 0x80e93a32e7bb86cf67108bc06ee4d91a1bd547412d4b3c52125eb952f29410ac. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHAF2519122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f728b804b2bfc57e124b9867e621b3f692cdb23dce7cc5dd2cc2d1cc593f7b4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GXHAF2519124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adc42a3f6f7ff8aa713ea2481e7fd51bdaefb4c5a32f2f11469c9264f5f6216. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHAF2519125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c850f4471224321e116bae6cbf15a385a688c22d36f544c0a342fbd59c2507e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHAF2553299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fa88e662a210659ee9c989cda142a91a9bc148ba5e0fc376a856b3235bd018. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/GXHG92511332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4794982747e05b084c3ec7ebb66ee55fb64eaf35a644cdf3ff0847266a208ef. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GXHG92511336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80044396cf7471e453cc7ac6007bb717b562809996509073859181ec6c1c818f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHG92581735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24fd70b449845d240f3c88d0ff3d446c757acdab7f2989289a5ac74e93bcb9d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GXHG92581736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be59fed68e1982fc4669ac3725dcb1bb9a24ae73a87134f8d1a75aa55fd5318. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHG92581737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e50e592cb915d4ee798dabc716754dd2eadf80eae15890a19642e51375ce37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHG92581745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b41a9eb298eac265891d6a02aebd880c3f62c0435532d4a00f66c8d2c5a6764. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GXHG92581746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced6967276be98e5c13c034285e418de64475e80091ccae71d2ebcbc2be8b9f2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXHG92581747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c167e6f9841413a4a7e7ebc44638f1012838794fa285e494c0c5f4eaf97e1ea. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GXHG92581748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffbf8289e0852227af4e6b6c41e328eed32bb4379dbb7498a4dcc1b9f3b5128. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GXHND2531025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d42eea4e79efe3e27a7d5fe97514a0c18ad35cab610890512b910761abdbf2. 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/GXHND2531026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6d740aeacef258478d8680677078fb26aa02d2d3854bbf7d566901d76b3189. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXHND2531027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc82bd869323bc10ae363f9bff6c4fe74be6acc3842ab836111c273dc30fd97. 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/GXHND2531028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0359dc6a2d0fd8953b0308fc77b34ef023d4063e34013569814fd2d7b3fef4c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXHND2531030.