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 0x4da1800de3b881098fe5eb724244378a08a5dea5aba88ad86cc9a742f77fec6c. 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/820a598f-a8f8-44a3-b1b1-6f3065fb6510.json and https://artists.proofprofile.net/proofs/artist/820a598f-a8f8-44a3-b1b1-6f3065fb6510.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 0x299186fb4b9bfc9f0d27c85f9b114a6c26735bff28ec365cf430a7ed1f9f8161. 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/FRP7S1100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e711fb38f1d12a2e24396b945fa6407bf82c390014f4b9b02ff365c9bfd298. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRP7S1100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d43af70cfaa89cdc1c39b217f0023bc598ed3363034d49b8231e65fb83e264. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRP7S1900520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5ca781afb30b71277acbcf7ab8d50372c64aca60c52563fea79bbfb912dea9. 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/FRP7S1900530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0b9db9f16c964ecbbbb04de8db1662bc3f7ec03a03ca8d7d4b8db077466e73. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRP7S1900540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395a52d32f4e93a0d6cae61094362ee06741b781bc0c4c51db910f95596dd278. 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/FRP7S1900550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233e1645cdad880d259a765e7a8fb27991014dcec9616843648a0f799cd9e6e6. 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/FRP7S1900560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8440edddc48f8546a8f4efa2c6bb0e171c9a16957caf2fefca49444d2bdfdf. 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/FRP7S1900570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f5b171d8c94f338b1ee6d0b04784b80eb851ac98d3cde4e40b2f2e7d4aed9. 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/FRP7S1900580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895637a2be2cbeb8cd50f6dc7b097b353e44b566ee791a22dcadcaed8e5c1b17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRP7S1900590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd49299120c364826ba6a4f0b8c1cd8425512f2e7004f99ff41b3ff46574117a. 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/FRP7S1900600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009793fa385bff862eec1b2381be8151d8d200ede49db074fb9791cac7a469c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRP7S1900610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01464771487af0d6e236f8790640c0f4fbf92245b788b24c56f0c41d12e77ca. 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/FRP7S1900620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2dc79c77f177455fa61101e3d4009236d0b43c8010af8d11c28c561f238fa0. 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/FRP7S1900630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063bdf3882500456f9aaffaa15a55241d3b6b7d6096fe0c4c84defe7c6f7d13f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRP7S1900640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe102c461b983bd79f2fd78d58fc6535d9d14b725656ebf0d275f2f1b2a26846c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRP7S1900650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadfd0be96059f72f3eb56d9df22678f13e38d7af88a821e3afef5db91a02710. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRP7S1900660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f41113f41f035a6fb0def82de05c9b34ed0e47bda4c1636379bbfe3b11de7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRP7S1800040.