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 0x0ac0f03426fb4c1a229059819bfe082c626428bf1d0c8cbebf067e1bfbcedfe2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdf1539b-c5fd-4672-acfb-55f6476a29b5.json and https://artists.proofprofile.net/proofs/artist/fdf1539b-c5fd-4672-acfb-55f6476a29b5.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 0xf74de9a7abc6de9d175835c312d97a618fa58937b2787b1e73af36015901cf19. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:26:57Z), 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/BR3J31000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd784723c5666888b891367e9feba2a4e9c5f45e09b98c5ed5e235247ccb0da09. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:35:29Z), 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/BR3J31000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5536de9297e665406d365442255c08f8b2def3d819a136facc636768466eef9. 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/BR3J31000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9bc6350afe9edfc6a6384aa24f437d7dfa46f89ac98aaf32c17e2b87bba0a6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:01:48Z), 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/BR3J31000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc01c7a0b1ba4a27e9bce2598de227c801bab707057c0f23828087806325aff2. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:04:23Z), 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/BR3J31000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688da49e4f483accbe245128adc8070f6717fa8cf8270cd401db23cc5a386cfa. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:01:56Z), 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/BR3J31000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e078197c597739a52ac91f96dd191bce7cbaeb3f3ef84eb9017a207a0ed2fd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:11Z), 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/BR3J31000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c082205d1a4260b815c0bb30116d198fd582040c89016b585e167cde4b5cf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BR3J31000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24460bdd5318e204ebb738d7e87aa9718d396a54c981bb1a7154cea1cd2b3ed. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:45Z), 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/BR3J31000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef41046da97db90bae2ecfa3e0df5e073c17475a2f3f611b35bfafe0e3993854. 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/BR3SN1500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9c9fd2ea0bb2212aa0d08a7b4e3ef675316341d84654f1e287be2ec10106c8. 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/BR3SN1500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fef8293407f34a4dd408b147ecce07665027da88dae41ab565d043ca1afd36. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:25Z), 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/BR3SN1500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c8b5ac5a384d554c19e28c20b07dedf58f4cc75cda9d164fecaaaae7f0ea0e. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/BR3SN1500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8274e2538fa00eac0a302dfe7a7ebcea6bc9153ca7871de4a5153d8ee440ca9c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BR3SN1500045.