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 0x1d7e3dd9d890329ef54ede0376d19f2f597aafa07a1ffacb7ccad44661eba690. 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/7d5ee93e-2367-46fb-bac1-216fb18ed298.json and https://artists.proofprofile.net/proofs/artist/7d5ee93e-2367-46fb-bac1-216fb18ed298.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 0xd3eac5601d52f14718eddf6d34b9e207638abd532edf33ad120e6aad90f9ea15. 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/USHM82082827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fdc513f0c49ecc4e939a30a77a6311043e2b0ca0b18c61abbefa2fb26362cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1382357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b1643373a10429979b4224e988eabeb657607624f8b126af74c747eeef2f8b. 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/USUYG1394708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581c5429cfe744b2152ea82e814bc2b418f7452f9e2d754b6cad1dda7022ea12. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1412678.
Jingle Bells (His Girl went All the Way)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42809d2e659a245198b3821954715339816eb4d029e15eab0688c93c4a646c7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB82289135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d0ad2a0008cd6cdc242fa149109cceca70fd886e782f0c6ea43d1d64d2e7d1. 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/QZTB82289136.
We Wish you a Merry Christmas (Not Really)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c71db693e9edccc447fc821ba994e799187a505cb7b9d7af261e119fc34d7c. 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/QZTB82289137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6749fa46f3e7c07568ee93b784eb0bc7c4328a19af4fc5a60de58f14e0256a32. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7819500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0948efca68b75d58bfcf352b08aff978ed68a48af8a49f9b000ac39f772c4ab. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH7819500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbd114bc74752c6991f83a406e6bcb63b5bb40a68b2c57d2b05f94f66e16665. 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/QZTB82289133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e8d4b3964f5694d421bf162599a79058573ce204af63217f2cb843c60fd0af. 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/QZTB82289134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42809d2e659a245198b3821954715339816eb4d029e15eab0688c93c4a646c7. 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/QZTB82289135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40145baca1c6bc56b207676556597373070f3a8ed9fd3ddf73f2aa5997ea60da. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CH7819577277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93722835b126f841602958dffdd39170de430868096007db96ede4c9e1b5bde6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/CH7819577267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc74ab4b66e30cc8f5cff8e4e26303377bb0a07784503c09034f2511985f296. 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/CH7819577274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b52da21a3b24668761d3b540fbedb94d61c345699bab1de20d5d14595b3643. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CH7812533155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12b9614f1b461c556b98ee07c9d903d8576e8c26a460b560f5d403a170e96b9. 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/CH7812539436.