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 0xf686bd29915176ff6a63c8a6632b0279bfcaa4afa1b6e6ba90f9d0e958a71f65. 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/38ad17f3-764d-46a1-b391-e715e26da4a3.json and https://artists.proofprofile.net/proofs/artist/38ad17f3-764d-46a1-b391-e715e26da4a3.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 0x06159d13cb25590a97f15827acf7d99d6c4511c8ebc8d4ca723b6d73add02094. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/CH6542045912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed27649e261fbe7acbb5d6dc7e342b90114c9c03785c8f4b922111bb7e9a503. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:43:52Z), 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/CH6542045911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85216af4c48d685567e86925848ff307a40402c177276e44da68df8602477fcb. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:09:46Z), 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/CH6541675770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758951d3a00b2feb52399b689356cfbc2922a98c827a1c850dbe722a89c9087e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX762360452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0307a943f7eb7769738f803c248d73f6833c386042c7924f368483748cabfdcc. 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/FRX762360454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30589ece38daba9d4436a718e49e6073e14f93e3bd19ad927949a9c5aa7d0e7. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FRX762360456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2743f182a484c975bb8fb876622d02c32d6586430ac4849ba1e1da842efd218. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FRX762360460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ad2418f1dcddc7a96721d046ded091b13c8e659642e03e4d8ae5310b94f830. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:37:38Z), 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/FRX762360461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4056fc8c9e4eb743b28cb4c7ef38a7e9b74fdceb94a57613c3cb48c4599a5d62. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/FRX762360462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5971ce70cecef0ff9563ff84943e426e6e0f1c150c67cc30813a40222139ebb9. 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/FRX762360463.