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 0xa0865b8dc6c8ff05543579e67006ad9376376ff2a70d58aaf975e9327ce2a3a4. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/812f9c3e-9e5c-4961-895d-fd87ea6b9122.json and https://artists.proofprofile.net/proofs/artist/812f9c3e-9e5c-4961-895d-fd87ea6b9122.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 0x3748af44b94cdd5ac7bd97c8c62db4eb18205a54ad0b8a1e796c697efc223164. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEZN82317083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba883a24e278f43977cb77bc9ab91054694fb4c124fb1ce1cf8d8db21291184b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QM42K2468707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9992707f43b97e77dbb4e6d57614240756387641ad254816f9f205a1def9e0b4. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZMHM2497596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d22a8c30be0a12e719914977837a67c969551677dd967e29ebbce56d7cf37. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UK6822412439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4073e5a41b58deff5b9f18b46121354574d2cb7a2180f7651225bda1cb4b9849. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/UK6822412440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14187f8ab45b812e38c81438b9a8db4203fea584409bf50ed3fc4f10a64b4652. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/DEPI82417235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ff9c6d4570bfc0a02515899041d5674b7f8924955ede15c566b20fcdd75d52. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/CA5KR2477026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2ad60b9a8b6341d53bfdee091bd536b1fa57e644afdcd3d45dc4d19910ee28. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMHP2410894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00fa9f83c1bb5a8491b274c608eac7ff2ef0171e75ca21d2396876d4a4f1d20. 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/QZS662406546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c6982209b77f9b73b8a59f9bc2d001bc21b3ed0f2ee9624f8587be111fc5bb. 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/CAQOI2412071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd2299b9de7f0409c27c015dcb035c52782c3f552fce3f13050e0f7c816e75a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/MXA3V2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a7cd21e0f522a9ae1413af3f2d24f3ee04f426ac6b00d9c96b80d5a91a0f21. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/MXA3V2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b92a87cf2e923689421515857fb15f3821cb92da91a19a3c8f9da8fc5ae0134. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/CAQOI2413303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f94645694be2b3fcb9098ee319f99fa5e0096d179330f9ed0eee7370c1b25cf. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/MXA3V2409667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f4ecf0fa0dee27d764bb8bb06cf831d4cea8ed8d5aaab52e43972c3b66498. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXA3V2409668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd12a2a09c8cbe9b82bfdb6fd7eb73f9e041de3f3a5b48b003e5a496cddce441. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/MXA3V2409760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8fe17da6615f931cdd1c3f22b967f53111b8a05143616bccda42f75eb3a46f. 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/MXA3V2410053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fc09e32a1becae4ccadb07f2050e71fa09d9b8acc253c9037c251ba70e0774. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/MXA3V2410054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fd0c3fb4c4ed2466e97fd2e5e4fd7b15b89d3e759d5144d0776dc5b6636078. 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/UK6822419815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ea447dd008721e8b56ba8d6c7fe22f5e6bd2271de685cb4673610d4ea68bd8. 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/UK6822419816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275608d5f948ca4fab0c3414f6bd9086746117e06209a795cf1e21f960c380b4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/MXA3V2435156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c590cde7f8d1a6d20937945d562d7e64ccf3902e246639dcafdba2ca748ee66. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/MXA3V2436409.