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 0x44c3001c76e68140a8c54d5cff4ed31d4f2e5e45afdb10b00d50fd8024eeaca2. 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/d37b44c3-24d0-40a2-8ff3-47a2b7642bd5.json and https://artists.proofprofile.net/proofs/artist/d37b44c3-24d0-40a2-8ff3-47a2b7642bd5.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 0x897b1a1e2f6f5eca52f64bbb26060bf97a17cf7818e2d767d4036c7ffd2f1c3d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:33:02Z), 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/TWAN78800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfd243c54bc28c416cea2db1df027bc86a464eb25998c91bd635b41cc43c328. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TWAN78800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432055b91e4b04c7cab1f20480d134002f555d041087d4f437245b44dd3854b5. 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/TWAN78800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5643705edb6e014cd64925e3b13c613744d983f757b0c2d1cd596734d7137091. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:22:35Z), 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/TWAN78800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cddaa8fbfba94939cd914cc963f8bedb8147931708dad125f307f7e6c8b96ee. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TWAN78800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fb40b84bb6e6e9cd918606015de5de830fb6681b296b1e595f516db0a17eaa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TWAN78800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050effe63808336607e3e931442a159d4c2c8afc4e28f357a09650a84ed7228c. 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/TWAN78800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ca672c7310941975c6e7d9d70161125135c3f68395e6ce87f7bd6d09d87e62. 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/TWCC38800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326626cda174ec73757762ad708d9c635d228d946aab562a42106a87ad866037. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TWCC38800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64eb3195aa092af5a58873c383cd81a10e4bdbfeeefc2f9b750fe256af0ad3c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:40Z), 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/TWCC38800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a28da13fa79fc3d012ee6b4fe07792ee3a3e4d251927fee291f05a4879226b4. 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/TWCC38800128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76455da315e2112003413634ceae9b84c257cf447973b86170277c9e31e43d9. 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/TWAN78900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54697baecab202271a25c1cf5e7384add86a49d95099d7a784b32ea1a0b09e8. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:25Z), 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/TWAN78900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2786ff3ea379a0764f8d45c22dad4870d4c24de9c7b84db04de0f3a123a4751c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:36:54Z), 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/TWAN78900010.