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 0x6aa581ae7e51c113a90fb14986f78dd53a9911944cf13470bbb5dc7b8432ccee. 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/0376d396-68b4-40e2-b20d-f2595b8da261.json and https://artists.proofprofile.net/proofs/artist/0376d396-68b4-40e2-b20d-f2595b8da261.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 0x186c53d5d132cb8dd7125015adb6883fd96708178d78bc557eef819d3e25717e. 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/IDA921905715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca28c25b0b2e36de68ed95cbcb159c4f59f389d40248687aa69b117cea3cc2f. 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/IDC302110970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055c24f78fdf26726f60e0c40c3e52dec20011bec7cf3537c93dbbbf9222d927. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:33:45Z), 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/IDA632205000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5f16755dd7f59bc59e7824d1df5d5c6e8b93e288a7e96f52a2ffedee7924ee. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:08Z), 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/UKRKJ2309276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ce3406409cc7753981d41be632025232f042f6c55fa99cf41675c8fff90323. 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/UKRKJ2309278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400d0cd0f86deefe3812ccc09ff47f77f279e31edcbb63408931099f7b2606d7. 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/UKRKJ2309279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2e48c88550e53ed2497dc770d6d8232fd8232ab951a102ce762bda04f07801. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/UKRKJ2309280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32e60544687cf774036c1705f9a5b74f4943b0f7fb7b49474b55131037cc171. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKRKJ2309281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c3a58274726c966430b7d528285a8b479503670aecdead1942b23013ef57bb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:06:17Z), 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/UKRKJ2309282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb96837273ab67d615dc6ba75bf3beaeef0f1d2526ad72acb46f157558251f. 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/UKRKJ2309283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5218f77651b6051f7a60dbe05593ea28118aea2cbc8bc4702bd882bcf9ee682. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKRKJ2309285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31df267779ee78cef16ee1c817cd5d61a282e317c840565edc2c421f6a2225a8. 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/UKRKJ2309287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1885f2b6f30cddbcecf499f596f38318763f8a9c84bfaeb340fb96b1a4ee3d9. 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/UKRKJ2309288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74199a87dd62a427fd886b1c88914ddef427438849c49b0f23bb62e73c3f823e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:32:32Z), 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/UKRKJ2309289.