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 0xd30a7430b3861c1941b9b056eaa2b3d6b7e6d6e8bb0c0e4c49a66c716b8125dd. 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/5f364c23-947f-4a18-b8ad-04af2ded1275.json and https://artists.proofprofile.net/proofs/artist/5f364c23-947f-4a18-b8ad-04af2ded1275.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 0x6cc547ea07a1220ed9d21507d80f75b51cb41f07c092feca12b8296e028724ae. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/MXA3V2414323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf5068d45a0ac623de7ee7979d020ec2c5901d4ec582a5c47ee95df81211a63. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GXFHP2433205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f667aeda11a2cc9735dd2cb1aa24d885631d32379c04679f507acba89dc9472. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GXFHP2482183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92935ea72ec5be26ce7586984f33e8dbf15f15bd449b4c73e71d32d82e98484. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:49:24Z), 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/GXFHP2436910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4974d674c2fc0bd7188176071419cfdd0a5566e1de401d6056ea06e944ab7ad6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/MXA3V2421885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14fdb9c5fc96466d467dc698a5563d593a1708be11cf7b4cb90ebc003c3e22. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/MXA3V2421886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248380e64920fd32834169d858ece226d1e48eaa605c5526d0640427655a2064. 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/MXA3V2421911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67e008730d724d3f2fc2c228b84c0c985bb6919a9fc856ba7e1c0c99fb60558. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/MXA3V2421914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ab6a0c02ddbc0d73a8017288a30af58439f31003eefd67da52e5e7bf784d4c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:12:30Z), 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/MXA3V2421916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe777983ae8fce0ee9323fa8ee9096d7c9135511dfce3b4e6926c3cf1d420d5d7. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/MXA3V2421877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230ee5dbcef887d3d068a35089832976e3e838af4e3b24562f37dea37ce68b61. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:22:37Z), 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/MXA3V2421890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c4d2935629696a3aea42e9870bd29b1273308fbd890d67ce539a234c02e800. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:34Z), 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/MXA3V2421802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5e07780d7cfe9349816752f34dec60b2a509f0d0d491b3c2739f0584fcf64f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/MXA3V2421883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2560a170de8d55597ab36f708995eb00f3a0391ec1f3e0347095f0815f4f3c85. 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/MXA3V2421868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2e592ccdc35a2192108d51c59c57a5c4ab02787db48ac33df6a69b684c2664. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:34Z), 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/MXA3V2450912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27388fafdf7a5c14dbb1fde944a0fab5a092129c9a035477f15141692a52de2f. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/MXA3V2450910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e4846ef932345b7ec9408a321d05944fcd2d2e2289dfaf2ba2a72b89591ee6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/MXA3V2450894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe568d377fcbdbbeefb76b304de0869758a99bc82da681a4b804f63a2edc5420a. 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/MXA3V2450915.