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 0x96c639003e5e0894117162d5e2d1e7fb58a0b4732883af6a205ddbfc0e8b5392. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7672b4f8-414e-4e96-85c1-b998f1dea754.json and https://artists.proofprofile.net/proofs/artist/7672b4f8-414e-4e96-85c1-b998f1dea754.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 0x7e3f8cf0a909827a2702240e8facbd6058a9b5f05c70a81c25a5a30356383746. 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/QM6MZ1967625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48804743e06650b79377b73eff65ee58dddd8d25a1a17951c07bd420399ca83f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM4TW2045080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6553783512389462a2c30c346efd46d3aa2d7a1addcf76bf0bfd4e88a26c5c11. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6N22019389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28631856430072e00c55914d1d0874590a40b2414a4b32c11c3859b5a039e360. 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/QM6N22019392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1928fdd4d446567321ff2cc9b5ae9ee620f0be62398745561bc525ce8641817b. 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/QMDA72137335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffab24623a0d245e86d73182f11b9b1e1635e79265eac9a60c1dd48e82532f43. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6N22283518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1336f131a1b9ee0e6de685dc191c1b7e7f3a3ff17a614b6de3b596102627e2db. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QMBZ92268189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7742fbe00b3c6f4ecc4b9e71c527b19a3fe7efe5814aaf287100f8f7acfb5949. 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/QM4TW2345735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256a5db88c926039b52e86610ea526ff2cd4cffd03aaf5a599d2e00c90f1ac08. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR2X42489468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc40a3921b08e94f4e537bfac8b05ed56647a843d5797e3db74016924fb641. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:52Z), 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/USLZJ2176790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e321931fdb443473e165d5377d6359a4f2083349d69f52dd2ad32f357a2659a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USLZJ2176800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1050534dd2ae4e4c752d1369b2ef5c6b50ceb7eec42d4204815bf48832a70a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USLZJ2176804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0d2e7193346a36f3895a332c89ce5e459e52ba0f48cf4641a7a23dfcf9469b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USLZJ2176806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b70a29e9d01773f5ce38ebf0fa4e953e3e2086f2d92019d64a0dd2c0bc18936. 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/DGA072455918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8078dfeb364631e129d5520721f1862c9aa6ac2235105b9e73a88d6e69d11965. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA072487958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b70a29e9d01773f5ce38ebf0fa4e953e3e2086f2d92019d64a0dd2c0bc18936. 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/DGA072455918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f4c328e55cc23a71b2b81a075f65a6f5aa196b488e8f59daaee5fb09fc0cb4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:51Z), 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/DGA062490960.