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 0x4e808fcaeb8c038a3bf99a759693a905ed191214ca9080c0bc8eb2217643317f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0921dccd-54cd-48a2-81ad-81efc630e5fe.json and https://artists.proofprofile.net/proofs/artist/0921dccd-54cd-48a2-81ad-81efc630e5fe.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 0xfc8b7bfa06f615621d3a1a692ee5c67e9c6ede8398e6ff528e3aed50c4f9ed17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2304177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d0ee141d6d0c0ffc5a6eab10190371cd5c0ecf23189b32d99c10b11637ed9c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6I32416805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfbcd974efaec8f0b96e1c0349d17f2c3f5f7d53b5329296d45aa1683d7ac49. 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/UKZGC2406457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97e64c81cc6dca0e1535b2d952b79c7fa1d8685200f34f4208cfadadeac7930. 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/US3DF2477034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9186683eca7ac4120e107596c9d09fea909d5e9e5a21cf194ae22c8455397cbf. 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/SE6HN2425404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb2faa07cbe987f6db0dba4097cfa1f1abfc2432684602a34989f08cf92f47c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5752453901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936cb6be34f136c0926e409076beef47000bc3d1b7156cd37503fcbdb220b501. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2402539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8026b6a8dcde012185ccf70207676c6b37216eed6e98a4e583c2fd0fea30f21b. 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/SE6XX2382413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da750f454ca7a6bf083c1e410b56e17e9a11a551322f85ff12dfb5d876e339d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM3DF2250351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc299a8b10bdf6ccf4a157143bd15c27e9bf9f74f7b6c868e5cb0b4d4bb927e7e. 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/SE6XW2342097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ff27232532e7ff25c7035ca29dece4c3f4a8dc418f441fc63a8e2f3f44fb5e. 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/SE6QE2350764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf21b6f30c49066967eb559df4518e59c960e174c43341483517aaa4ce7731f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6QE2316436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99741262697ecd5c93d0cb976cd43d5d4916f33196fc8d4e53f509e06d535df0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6XY2294135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3931f3678e8a3bb48161310bfdc165c34f6b006bcf8ce2c0d2684160139a6239. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE6XX2268899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6ba2ebc03e5b0b4414fcec840baf5036f655dc22b5767f26156d83e7f5e7f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6XX2263107.