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 0x01881c89fff2ee9b71f1041d9819c531289cdec8a3c12af538cc19d07f8f9056. 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/98e0482a-673f-4925-90d0-c1433c9560a8.json and https://artists.proofprofile.net/proofs/artist/98e0482a-673f-4925-90d0-c1433c9560a8.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 0x1de6ac0b6907f8ab5bbfd41cc54dded76998e00b928e23c0dcc7dc39647686b8. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/HUA612021906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4437d94e3022e1ec8de1fce8815fff970f0fbd554acc97ec94b8aaae41b62210. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:55:23Z), 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/HUA612023221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07281b14ce44bbda9c528dfff3d6be81d7216d2b7cfa4601d5fc5978d37cff8b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HUA612201009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721be03cff6f3a9efddd26eb06cd0718aee7ab391f9a8bfd4b044e2d934164e4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/HUA612201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc239fc8d369ff56c930e86e0f4b0c1f56dc1d14ba473043083a913bc1b497ab9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HUA612201008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930352e9e141481347f77968581a3533af09c22a252f8cd87135bbd862823c6c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HUA612202267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e60e33489c2699046df03f5d24d255688801fcf9a40902f2046e8426709636f. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/HUA612202268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5355739feabcc05354c3affee82fb413bddecdbd4ea1eee6e55dde011dca78f. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/HUA612301785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda8f6f99df64297a9c28723c9bfdd49c903ef38a0d71d3078fb67c9de05d61b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/HUA612400842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b0e03bd4815ce46de80c73fd3c0dd256c7a97cdf425dbcfc5b1442048cb572. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/HUA612400844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7895977ee6f9b565efee0707917b6f5c6b347c4fed0a878cab780155cf0da24. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:25:02Z), 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/HUA612400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e264a7f8b8c7c3f9fd0c8bd907acf320764f8223459f0411102bc2bfe592e6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/HUA612402520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacd0dca9ad1773486279e3f0ff432c97dbb1180f8ed382c1e46c4a5b8e454b9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/HUA612404443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c83c18127be919f3389d7bd439df94ddc34d5598ba599016a2482d0bb93b3d9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/HUA612501777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4de0ebf4f2c568d295826540a981c9d20ef16e1c4f7f5c4010c73d897045078. 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/HUA612501686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1bb19d24a57f8055b4afcff0657f0b5c70569bbc53cf5dda7f6e4e200f7bd0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/HUA612501782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f385a3e5857fe0eebf6ff47db7b9b58fc86cea66e28157c298d211f06c19475. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/HUA612501783.