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 0x39ae8e7134222419cb26a3c4a3453e3a717e06c5f5fa35ee4a1f237c606c23d9. 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/e22b5cb2-b757-4f9b-9b45-a5a85a7779dc.json and https://artists.proofprofile.net/proofs/artist/e22b5cb2-b757-4f9b-9b45-a5a85a7779dc.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 0xf76a727c7600aeb8e4065316ce837eba23ddf26c2ba3388c3d44f4adbf27e25e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/IL5841830934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eb5791ddafe7d077948d90249b0542e5b86ced684df767cb1776bd68615e91. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL5841830939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e13dcfa071dd2faca990c9f8c84cb138f73a7835261bd2479a29680e2e701c2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IL5841930940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9def6cfc4af0952ec8ac52b96f7832ec28473261510d83419176cc53f7c3108e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/IL5842028489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5601434662d5c60f4dba989a6dec0a362ae9013950b00a3e2951415e720d3ae3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:32:26Z), 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/IL5842028871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434425df9c7d6c5d1b028aabfe8dcfa112dc033500c75ddb408ca9161616ec53. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IL5842030685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe043ea6ed8949949d87b59b53cb1257e2c25496adbf1327ea95ceb2f0a4e2612. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IL5842030330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d3950c9ca6191f12e0ac426ac544043eac412f51d694aabc38c1edd7c3a032. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IL5842131361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf792beb924be0fdf6d1fee1f692983acb92e32b8afe5ee50766eef0bf3324a69. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:53Z), 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/IL5842131364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5751b0d7742351b633ff8660b597a11286ddae0f8797dd1af62b4e27be7c2af1. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/IL5842131368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5851c965f3623b57e69f76682f1913fb9adf06ae2e887a05c0ff7ea253c3f04d. 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/IL5842131370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fc4bf71f496b1aeda75cc7cfb9183768fd824973a5f8e27ecaf8ef14765732. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/IL5842028490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cccb79f58c9d7f984ce1e707b0bfe56040837aeae6cc21c702e7fd858c9e141. 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/IL5842133131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2588d5a1261f0ba0540d2e1410b886ae6712a78ee641e83d144af72e6014100. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/IL5842134642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436ff27627ca5a70c402baed01f824034397e3e6331597f988664ccd8c442f6b. 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/FR26V2006288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e818ce9bf09248f7da86cf1828f4fe0bb4ef8ccfe533ed0810ac1ba5149fb4. 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/IL1471902257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fa248f860e6bfe3b1bc8f2f51c38838eb4a38cbccebbaf07e2500ea7b46732. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR26V2006284.
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 0x13ad3b31a8302d5822a0df086c37ee681f86da808a92837271a59bcf2e1dfcd4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR26V2006294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac81db8bc1eb0753ee6ab3a4455ff0c48bd4538171173440f9b81f331fa19d22. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/IL1471902449.