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 0x54ee1dc9cbb8fcfd10b581b5e5aa643333183be7421552d5bbd900f768cd56d3. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70027c52-e75a-4753-bc15-57244ff7b147.json and https://artists.proofprofile.net/proofs/artist/70027c52-e75a-4753-bc15-57244ff7b147.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 0xe4b67d9fb81cbbf3b42d1cb5d0db36d6447e90e35258647b74e6124f514a2a6d. 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/GXD7V2264541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1d1c3d76323384d0f0ba90d4d8d8948cfc92f4c046ef4eb641413dc2d61cde. 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/GXD7V2273367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8da56be91fb9df0d7dcf31109feeb286f3d6856e028ba535e41c9f49f30f37. 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/GXD7V2259656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d74f4cf24b3bf801dd3a7e34722b1dce72c46fd3a35da965665f6f01eea1d67. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:29Z), 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/GXD7V2217573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc25bfaf8c63bc630b90b51263ead559b026e802eaeb5dc940676d0b82a131f. 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/GXD7V2246075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bfcaed041baee8edf0855a4fa3d85cbfc388a7b635f44da6821f63d487c39f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GXD7V2206528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c55d90fe490931ad931cc81f583ac2dd09002428f58925bece2e406aa7c411. 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/GXD7V2247409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b46144fcf74c7bad060f2a6b86545142aebc19ac9242ea44d9138ae7ab742d8. 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/GXD7V2284759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b91c9db3a4f22f8d2471713197ed793b0c69da43aa2366886af6c9c6be803ea. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXD7V2208221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817c10c8ab93745e523b3e01c6d0095704bcd92bb4a098a231156ed475e57652. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GXD7V2230963.