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 0x6cd5d0c4e7032243f1a2ef4a11784c9e12adedabe69c61aa8c0f1b09cc8b1bf6. 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/28dc26f7-37ba-4fcd-986e-91e01f7218e4.json and https://artists.proofprofile.net/proofs/artist/28dc26f7-37ba-4fcd-986e-91e01f7218e4.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 0x7f8bda94ce78a33507cd20681a85690393203d5c2a04e8a1c5a2fba4677a09e8. 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/DEF067200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ce2cd542d324eb98df64a9954b3b14049c975eb37157bd0ad1de0518d8ca1. 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/DEF067605430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab730648907d220067c131a52ec0782a455f5dc8920b1b19e712408edac18d10. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEF067605440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece493fcb59659afc49c365553b8b4db952e31a24059a19104b12d47d380311. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:23:59Z), 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/DEF067605450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513c288bc0b53f520b9eddb0c91e23ed8f33f45389508b837c1c1ccebc0f9844. 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/DEF067605460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c5357eb81b151283b4a3954fa7e3d38a514b67c2981671bdfdf23d2665d9d4. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:16Z), 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/DEF067404390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb469073adb0658a93ff01bada260a43e488d1c947b28ef49db11425e234237a1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEF067605500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b9d9948aee597eb4d42dd1aad6823d486fb856e38aec44e8b1eb58af073791. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEF067404650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bfd87c87ebdb38484fac4091f12b415915bdef76fb2dfae2ea59f32212859d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DEF067507400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365243ada4ddfd8b7de9baa06742a4547e4b626b8dda119e0ff36493c5717ea8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:47Z), 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/DEF068000540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2397e2c55d5831eb1bd44dcd3ef57c6cc88f646d4cbb1faf84743f26d01086fc. 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/DEF067106200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2aa8c1f5b3941115751557e289006f6e93df5bb03c5a15f5b7159afdefa083. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEF458716524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac0738ecda46c36220cbd272ec80d5f89cff552148e8f03117ba444d514f4c6. 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/DEF459615422.
Gotthilf Fischer und seine Chöre - Lasst uns singen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd555b93d87c9c32afe1eb474832ab36240888528421387e2bcfc82774ca4264. 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/DEC959902025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff3bd7bb12a63366a7b829fd340b186660edfea01770a2c3f01e655b6ebf0d. 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/DEC959902028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b8cc0c9af5398224b33ccfe5d995883783faf82c6cf8ead8362e5e69699219. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEC959902023.