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 0xeb10f63fc176abaf638b5910d6cf6ec6097172c4453012e32f3451e6f62b728d. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c6b3cd7-89f9-472a-aef6-71f2b84c30fb.json and https://artists.proofprofile.net/proofs/artist/1c6b3cd7-89f9-472a-aef6-71f2b84c30fb.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 0x2678bfb471c79c990d2373e93ad9bd4b74cbad5973840b524cb7d0599a10d429. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAJS2540028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983c30a80891056018b350bc6f0e78db7df04bc7f30a136e2065ade858359027. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAJS2546051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34b9893a9e0503b9d34093b33ec4999dcb2b41ae20b108f70202244e0be70e4. 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/TCAJS2550748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce31a664a3d8a4a13b686ae6c460bacdb64fd778961e128daed312fbc9961b56. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:55Z), 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/TCAJS2555961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac440a2e55f463f037153c380af67e6ab76579f9cc72bf6fca313e091ca2866. 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/TCAJU2536082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c59147c37aa79e336f509437aa2f5dc4af9b3e68607c718cb0e9f106864cee. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:24Z), 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/TCAJU2536315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf86022da9d668de4a45d70b18dbb3b5092aad7785276ce91f8c24a49c02989c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJW2536265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770abc6b4e841e5bd08bd2268debbef061ed393aa8c7ad78c34f59e6ddd941c5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJV2557454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc120c1f173fbdc704a69bd1a5e92cf0ef2d47f03bd0cd355b204bdceca9320. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:13:02Z), 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/TCAJV2536450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac555bf38e15006e0dd42582d30e34ff1efd045fdebd17c769bbccbd9b7209e3. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:05:10Z), 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/TCAJU2536582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f19857779c85b30e04b2d87b66be533fe9e7edde565305f1bf0b8a902ce7bd3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:34:34Z), 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/TCAJU2536531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b1a5b4fe696fb3d3a02e078278df98fa28aacd9458aa02a073854c0b148b81. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJW2557526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97217c749596fccc9c26ba86695db85a97f17c155e62cfbc83601aa82cd6e6dc. 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/TCAJV2557722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bacf71a366bb2a7f0003945a1f2b970fb6d9faa32f60bc6b7e0f9c8a588b29. 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/TCAJV2557648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5628a32841161b9d7e32f90b81a3e45f3eac3dd2615664fcd920e182e6641e2b. 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/TCAJV2557875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e69b07ea85ba8f87723c300557af44691f2c96c3a6d68e645c8f9787849544. 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/TCAJU2557501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7ddd694734263fc7eda6dd57bf0472848e60abfaecdce0c66c340878685bbd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:21:43Z), 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/TCAJU2557785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e0f960753cf4b392f220da015d8267cc766e3d0cbefc6a3e899b6f37c7202e. 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/TCAJV2557686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5472eedc5fa2acab6cb37187e6f8f66846c3659811ecc3440cea78cbc8baae. 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/TCAJV2557372.