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 0xe59d5d5b01bd3455e90e79b05280f786142b6f90a8e430ea7c8ac119d2fbfc0b. 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/606f05d4-6645-423e-8dbb-ee9d37818629.json and https://artists.proofprofile.net/proofs/artist/606f05d4-6645-423e-8dbb-ee9d37818629.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 0xa22fd261ae1a3782063bd708f8a05741e3ec58c3379780277ead851883064c52. 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/QZWFQ2335672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41269bd2f132f3c82abdb7fa9efa93a07b19a169772bdb144f3e5a1acaa0c0bc. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:00:31Z), 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/QZWFQ2335671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50e9b7d9654b2a0bd1744966015e694cabd81c7982ccb073c10d0def0f6d8f0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32402341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea923fb15fac4959ce29b3820e880e50f21624234c0519fbbbfc32e4ea514b04. 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/QZFZ32490053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cadcfef8208b3548d6fecb3a67c9f4576f10167142ad0d76119047137cd890. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA62420538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309887c5a42f820b343e7c599bbf4580a44a9f373a6b1408f25a273a6bb4bf21. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZDA62428865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f89111daee09f50ce28bc11cdec563a4890cafafb25b64935cfe59ceaf4bf3b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62417175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a48d93db0241c9d34f7abc8db31ca50ed2449c8fc47e130e459619dc0d6fa8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:00:33Z), 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/QZDA62420558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dd2ab48b20fde114145146a7a118acb2458e6b31e4e50f14bf5bf789377198. 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/QZDA62420212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d040481b18a8a5f40f9bcaf321035785f89922e60d7cb64f82ede699ee12ba4. 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/QZDA62420546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cadcfef8208b3548d6fecb3a67c9f4576f10167142ad0d76119047137cd890. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA62420538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b856e5e8c7359640dc484f12b3751da634a3987140b2df1ee118c34a731f1. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZDA62445744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85dd59577219e83fa0f53f887600e717dd1f90592ec07ba95487e7e185dc20. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZDA62445746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8364fe16996bc1b823811b856afe431a8bebaf7adc3da66debb96479d16f4efd. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZES62414599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dc0c2f64e6a6d850c2f962bf0b04f64fd81dd23653118e831b0ffc33c4ab6e. 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/QZES62419963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae5fec259a847381ca298c2a426bf2c265749f8faf37149420ab1181fdb7311. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZES62416911.