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 0xdbcf168d43fd24a1bdf822414f09ead5158548f70aedd6f1e8d11c4b664b7573. 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/cd97cbd5-5d95-487c-bf37-303817b59216.json and https://artists.proofprofile.net/proofs/artist/cd97cbd5-5d95-487c-bf37-303817b59216.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 0x5db3a01cb0ca754241f972ab2af0a2eacad147212e627d2b9017613f1c9f7fdf. 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/GBLPF0217560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb50422340bd0509d061ad0e8cb45ef3b1548c66ac92baf7bf18278e795a22ac. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/GBLPF0217561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9d0b4a22b14dd29c6b6d00e9c489b7adb1c297a061d848a80bca11b4567793. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/GBLPF0225167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd9c938fa2ec8de675b4fffa0a355e1e764685ef55a63da1a765914198e2efc. 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/GBLPF0241740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7466f301b9d58a9b5bd1c39c7c8eb2160b59470f7758f61b0186d68b17493e22. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBLPF0247410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b263094632e3f444b20c43144e98dea23081b7ffd5ef958d3cd97ed88d4b329. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBLPF0255462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ddbb073348147dbc2da3e033fd47f0923d55bf6701f34142e10c10eb033175. 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/GBLPF0297221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ead50f47b898d40cfe461e86e708087782e66f711b3ce53d91e0dd9bf19139. 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/GBLPF0277195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dff7eada880d121081f9b0a298778b1015445675a5251cc86df4296364054d. 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/GBLPF0297225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd78e29f04f455e64900a7adc3e3ae74fdb25d77daabfbe9803ecbf689151801. 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/GBLPF0260826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4418a1ba0add55b83630b9836d53bc7201219bbca650db6761b773abd7a6cd4a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBLPF6693792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b122e359d2dfbae06a199ba0fd5416225b941469c3a90808f0f36cb4478fe7c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLPF6706530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3268135e81b2d17fb1659fe5527c8af51af3e523bba8e1452e194c2cc43d64e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBLPF6731309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe323eb973e98e013ec202b404c0d40ff215da8dff59ed6891ba2cf4cd3f93b62. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZC62344215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e3497b770e5f31838d0e73afd5cd7e7fef87f8a13f4af9e76771da55187efe. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEZC62413843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bcde59ccf31a230c0bb1b29b881c30e2233408a56b935d5530986348d34bf0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEZC62437688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728134f15ffec89086f2dbff22c9b21eeb719a11c40b31f1f6d961cc5ede3fb9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEZC62462371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5078749cf2f80161a576a7035f2a25182e55e266a04669197d58d962c7b9d93e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZC62573901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee01120ee96aa7c0a2502f56b9dc081615e74ba6cb78923463fe93254074fac. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEZC62590576.