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 0x202b8c94424a58833b21d001282159662213aa6ef5a113ebfa86729e3eb09d38. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e83aa0df-48fa-46c4-b583-d56923a6a352.json and https://artists.proofprofile.net/proofs/artist/e83aa0df-48fa-46c4-b583-d56923a6a352.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 0x340b591f7d79b4d29e65a70c68a4ce3f863110dcb56d06d567b7c0d36e3c9efd. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:05:07Z), 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/QZNWW2219666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b81ee85498df4d5d1b1b2f10f5587e917ebf7245d75358fe30cebca562f6077. 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/QZK6H2384284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2e18afde2978ac7870176b93327725f655aa90ac13feb4406ef97f22aab3ac. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6K2397915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb95741262aae07cb1c3244515e3d0ba0388aba41694e2b3066d33782c2834f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:49Z), 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/QZK6K2397916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c7f1fe7a75902ed99a1bd4dfe57ae9086e02652ef76bd858a9021bda5eae81. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6K2397919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dac8ca3d7306e2a7cf548470133e1a16bd02b4f2e4a80bc7eb99c25e18efb0d. 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/QZTB62303656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c577dc77693a05771a87ea8cf2ad1a5ce4cda12d14d0a8526ffff31da1160f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBD2388758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb426b73350bf63c04b8100088de6c8f61b42d1776b39fe1309e2c223680197c1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFE2341831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf93db7664d66d3850591950469c70838d329b74f74bed68747aa0fec62edefa. 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/QZTBD2388763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b17ff78049167a47bfdaefd0ce6f1035de166c26f127a764647cf099681d345. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:26:15Z), 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/QZES72422890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670d665f98738662cd6ad97e9928f40ebd80b1cbb91ed423cb67ffe89d9e76a0. 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/QZHNA2404149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db2000f2b5f25f1a12dc31b3f22708f343fbfb42376356e9c693323c1dfea7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:31Z), 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/QZWFN2475070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02fae8a9754d0fd3d669d1d1c34e391d34f1b3fcd633dd74685315a3a1f38fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFN2475071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e2d563e323eeb8ed9f8ec3855610dcb0ee5e9fe3e073c01d29f1684db0368a. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZWFN2475074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d340d02c253ece3a46f594e280f76dac9ff8db114e0d477523bbcabbbfc3df. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFN2475075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2519cd22c196689e83844f22a9a0043e4e9dedbfd8634ccdca362e55cbd0367e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:05:24Z), 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/QZWFN2475076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ecd3834be5bc44bb8bca0e27e5e302505f42705129de41616adf12632a50b7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZVEM2542207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0bfa7d1310b5e2cef30e3eabc4064913799175ac25e2b011f0ceb05f13a3fb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZVEM2542208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1500513e9844c8612e6be9744b83c69f731acbf735ae1c76f78df6218a4cdaa1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZVEM2542210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee8437283f4c2afce6fe663be492892976f2234646304590877b140ec01b979. 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/QZNWU2541924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c73737bab245cc63fc9631a6a84f065c1d65391af31bd1f36872c416d00398. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZQAY2529607.