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 0xc03794a2a1f28dc096a827b74fbf97f5328a5cd99b83cb3a2b37ece655cb829d. 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/b60f8fec-c55c-4744-ae59-880b59dc34c9.json and https://artists.proofprofile.net/proofs/artist/b60f8fec-c55c-4744-ae59-880b59dc34c9.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 0x289eb84fe5d21e02f6ffdf6145f07170bafe1943d71a0ee173c2e4dbc6d20cdf. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:17:53Z), 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/QZK6H2438676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a29526fc82a8eb3335145d4972570c98de2843820f2d9609a1afff0cfa38ed4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:11Z), 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/QZK6H2468332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98051a398d5fedee4eede67c6210dcc893b2d85cd4ca2109d305e4677e72557. 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/QZK6F2470882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7ff4129ace5b95d3cd3a322149c1f13fc3d76ae2eb6fb0959ba99690356ab4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:22Z), 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/QZMEM2412013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64acc22e237c5d0ebe9e35fb17ba7b9f8cfb5f9762becfcb59c44d35d48d0b14. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:22Z), 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/QZK6J2404678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c870ab0719287538c7efe3d3e989916e238c9589b4da3cb41b7446c23b653. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:31:47Z), 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/QZK6K2416306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134359b92ac2f22ab85daa28a9c1c41c8cb5866c2bf5e215264c88e73998bd8b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:06Z), 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/QZK6G2443314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9cb85c43344ee83f1a3f589cb9801ae9a554fd21cf5df46cdf4898bbf4c7ed. 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/QZK6J2444979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87f4a7d688bd9ea8ef9012df1d6f215e542a74bc1370bbd44ce0ae83a16be9a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:00:11Z), 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/QZK6J2464126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4b186d548a971eb98dad869e7b0ade183ebfb70fbf839f624f5893c25e5039. 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/QZK6K2491550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086d91f834ba8a8e674949b296814c59cf825053386376dc43b413c7821fc64f. 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/QZK6H2494335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f5440f6869a1023412d14e30126f8cf129382e333463e4291db8e05d26c8c7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6G2447568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122b4d911c0ffc49f8de174aaf3b0b4c47c7478c043c1a6d2428d37b291bd47. 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/QZMEM2434477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa097436fa0338c6a1f539fe215f2435fa5ca4e53486aeaf5f234f600655d2c8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:34Z), 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/QZK6J2478815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc320b43095f46a6198504f06d42fda54e769eba14b1148756c9c83bd5b99ceee. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:39Z), 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/QZK6K2476688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4cde4d86d243817b7e1d288dbc486668031e0c9826bde40d255c0870510481. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:31Z), 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/QZK6K2433969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ca2df10d4d087df90e10566c984efa254a5c03a9a3052ad49117816c6f50f. 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/QZK6G2420945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f6fb479fce7e41f704511b84ae5fea8d151da827a8213d13e2572900156fd3. 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/QZK6G2495329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2dbdd629f96c9834978d004a880414750ef4ac94305cbde4b22b1042064bb6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:21Z), 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/QZMEM2406059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeb6b81e625a619713017d70af427c2c525c2f71183b91c8a36781653dca7f8. 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/QZK6J2484267.