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 0xe75d354a79a212e7584a459a0e7f36c11831a0ac88f09a0754899b4caff193f0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f5e4bd5-34ab-45b0-ae6c-740f7c67b60d.json and https://artists.proofprofile.net/proofs/artist/4f5e4bd5-34ab-45b0-ae6c-740f7c67b60d.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 0x84ff15a31d9dfdd7666a6041fccb56994c768489621a59a13589bec6b9ccfdb7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:56Z), 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/QZZ8B2504468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1691c00efee4f528c97e1785263237c9e892f1637144d8fa2d686fcc97f7b9. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZZ8B2504450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18173da8dc9d0c478c3f6652958618981e703b021831ee6ac9a52d74fdbffe2. 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/QZZ8A2547432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82a647844d8b6a9256a7993dd7df99f9b3d2741b83b0571dd86b960576bd0cd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ8B2504516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a7f925236c4a8d248f49d228e4f61543fd03b390dba0e370a764afab4a51d. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZZ8A2529194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd924bdb60ba4be8cc9737ab4dc4a691131c6e2409a2ddd927ef0d33ef82a52b3. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZPJ32395093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd924bdb60ba4be8cc9737ab4dc4a691131c6e2409a2ddd927ef0d33ef82a52b3. 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/QZPJ32395093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560bdfc3fadb5e48dc976b7e09f673bb947321367b5e4a236884076505058b55. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ8B2559031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086a7db917b4503bbd79a8bf16305c75b22f753a21aa3bee828f346cda9bfe4f. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:23:43Z), 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/QZWV32541746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc987f9ea2bc51edd11282fddfe3e7c59cbb77054331eee09d1271aa751307c15. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:42Z), 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/QZZ8A2529109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc597d9aca99e71303a708acb57db7812746e2916210b9367122708a509a5f339. 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/QZWV32546950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4b63ec05db12fdaf7ededadc6f4ddea98a06274683996f333c2c42f71bacb. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZZ8A2529144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa18c2148f07da4f9ce7da7afbf660bae130db56057653eabab057efac77dae. 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/QZWV32562297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e86d60783fb5ecf8dd93ed65c39c6580d18e5960e82b1b974f55e0f1fc5716. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:42:57Z), 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/QZWV32559210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a195d67d8a0661824576ae34046ef5ea911bb5428578ee513577e41154c0a46. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ8A2529204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8017fffd4f5abe56bbbecb54f3bc188feab8e454c48447f542143b9ac16b95f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZWV32550698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489a074fa93e7ce2843b4c58f12f5445c5ba2e0f2d0c9390f696c10514ea7aa2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWV32503060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0963e31c15d07f17996b35f76f603aaee7ca3059b0337d2559ef3f8a0ee3900d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:53Z), 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/QZZ8A2532468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59070b002c06191f8602e5c75a48c8b58096fabf83daeed23b1e8d823da98fcf. 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/QZZ8A2532503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265235d51eed8dacff43116ab2fa563de83d2ebf739ade2e25a503450971b03. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWV32537591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40356ecf1d010370fa342c1b1f5d117f1a897b1485d69b9abecae5ed6881871. 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/QZWV32543150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44656dceb5aee95ffea544e99e55440d7fa09aee195da95b7e679c12ca358924. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ8B2509564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3440bf0a0a491a4bd8b998c5a7ae4fb5b44c19c41abe6ab00b237a61ef2fc98. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ8A2503586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13cb0c7f5452f0cb516b59d7ba5e1851036c927ec4428d6dddbf665eb147241. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8A2589831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ffa3ef04dcf41e6271c659ca105efff6b0590b767e69e16821dfe7a484be93. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8A2585844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015db6c6604531b922242ae5142bc0b1cc22328512a9ff5074f66bcb0f2cc03a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ8B2504487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3d1d472a2b51c358d01d8d035c9f2a1717c3039b91a3875fae163b5dc9c1f4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ8A2585155.