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 0x0a761e24fcdf7639fab318ed7ba661ac55acd7855fee1583e992c48c8682c28d. 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/6b92faee-c943-4d28-8b7a-afb3d26a4ba9.json and https://artists.proofprofile.net/proofs/artist/6b92faee-c943-4d28-8b7a-afb3d26a4ba9.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 0x98f2b941c98181501960d6cc748020757d3d30093319aba6e89ed45ddea0de48. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZFYZ2237611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e95c3113943b813088750330c528a84a3bc33035a002c4dfd73c877ebe3028. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:04:46Z), 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/QZTB82395283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e1f4fa2ae66d1921567ce8a5f95a10248493adda6858ebe56ac6364fc6128c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB82395285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2181525205a6fb4d0387c636457f2030f26d6f9bf5b2e168206e9836c81e2d. 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/QZTBE2371707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98aefeeee9d4b7c068ef1bad1742fe38e284dee9d999deb7c1fb39d399e8f07. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFN2301580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe3a975750a15f9923c8bab3888373e93fed824b2c48024532792045654bdc3. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZWFN2301582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9630f98170da1fc890ef4a7cc33585c5795e5391ef1ee9e1165a8acfd8972ae7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWFN2301585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924d5948de43dfd5e14e4a9a463be727a8bd7720a08a47e49e1ca9a0cdafe269. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFN2301589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4959c732f0c695b07209e99ebefa20dd49926cb9fd321cf8bd4f2dad0e18a9d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6H2466979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b80599e9d186da353a9a4972ee4d5776d9e92e2b9ddd67cb9539fab9af975f9. 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/QZWFE2414797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce5292f964e226ed29f7336b09b03b87cd9fe9007081a9124a1ec647a9181f. 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/QZZ7K2487307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe877bcd0cf8808035ddf72b48b9e1a501a9faa7a39deb49834ec569e7fcc105b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZZ762496838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072a5fb67747c053b59557f7bb0031685315cdc1254d0523eb673b615e93a120. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR10S2542640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb07fdcc00fec2c58e4610f45690c86d51b1509a5c88737403ade3e72ad801c1. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FR10S2542642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e752e7c94ca7a23175119ca7835e5174551680bfcff362d42e26499b97ce5e5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR10S2542644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915024aa8657cb3b18d47ffdfefccf8fa90ab778d49fc33b9fa93368ef3562b1. 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/USANG2464587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5bffadf5c8ae388cbd2bffa2e0b1f46172615807db207b10f11d9ba81cc8a1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USANG2464597.