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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a31c4842575a80d89561b7961ed0c33d76861b633abd688abe370a640ced70d. 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/ce637243-4124-4ebd-aaa1-a9140697b48e.json and https://artists.proofprofile.net/proofs/artist/ce637243-4124-4ebd-aaa1-a9140697b48e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf58fa4bf6b30753c2c5f564cc9db6f7391db25ec572d718dd1d24b1cedbb746. 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/QZTAX2391108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f6b2a837260f1f7bc23fc8aefe76a884db07efd01c04856f9b229eaa1e85c8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZES82491842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68edb03c1871b6c7b644c5e0bbfc07de7ddfbe09e28efe3eefe68d2169122687. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHNC2404153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde56a50744dc7468b45b04c8f90e8b4a6b97be4ea1ce0c36376f99e115684c07. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZPLS2498338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eecec7a5ea378cd4821d7de4e869786027684f894bd1f662a4499f0b33765d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZPLS2498339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586e1bc5522e254624401338ef7e4dce18eb4c02fdffb53c3f7f5af191b269ef. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZPLS2498340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eff134eabbb0d24f6c666d9ed331cec59ba133c91cef283d903d4ce8d98aa4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLS2498341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84a7670142cc8fa9e7422f5296dc087cac0304dc0f32648750e63eeee63bc37. 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/QZPLS2498342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e3fe4d76b3563773e142330ae60f00cab8a7bc76d8b9717244c70184f1c758. 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/QZPLS2498343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fca41317f3432b2e42b7f082ecb49570b738895f4d4696254550a00bf94b79c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZMEN2545305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0162cc9e72e586fea831c9eda02bdca50670e50f6d33fb4098ff46963f66c836. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEN2545306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e095d75554c7aabc34c475d970e7d25125529d99d6bec2876267c1b2dbfe7f0. 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/QZES62582612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a0ccbd756040f643f5d8f79527a95cb06515cb4f2814d94997a696019661fc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZMEN2545307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0109b1676ab024728e179f3a4bdfe43587699753882d0eb941043b897383e883. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZMEN2545308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34d73ce26a452855468e38617c84fd1ce94df9fa052ef4bcfecc81a9ac627cd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEN2545309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035a4f19e4d1bd192e353b7025f0ece7421cc54dfc690ce3faa61aaa3d545eee. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZMEN2545310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d4e91725959e0038cbcdb054e8c1ac0a9bda7b37093f7ac0a46bedb42ff3d5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEN2545312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a888ec6c98c4d857ff23814b0b52e894795a1954791952078315546b5cf2eb7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFK2588002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb2e0d69e83039215edf74502150189d8d90bec3240e704bba825ccff451037. 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/QZWFK2588003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba82f5414cd34b5eb43a2e35761a0d2f696fe7e64aa8df73b1cc5db38ddc959b. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFK2588004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a60cdf77ad569e9097140d472d9c5e0fd0db27f8a0245220fb256bb70c1cec. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZWFK2588005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ab51ab018a0a07b329272f448047f125a591b8f1fb06a8abb20319610f2a9b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3EZ2508740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87113e71d89fbbe32e907ce6f5b00fbdbd2a83c746a83a1e600e88c43a6bc263. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB92470598.