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 0x2f8f728085a42cd5600102672f3051cec77033806c8e0a27ed29cf37b403b955. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b16e487-9dde-4923-bfde-8a18f20a6b0f.json and https://artists.proofprofile.net/proofs/artist/4b16e487-9dde-4923-bfde-8a18f20a6b0f.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 0xea3eb5b41a52b73cb9e2972b51ba2538a74ffa5c48d72fe2d17abe7e41b588b8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBSMU2021657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973cc92cc61833a99646a0a21cb93bb6acde63c1bead5901d54ad41772b11bca. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:02:50Z), 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/GBSMU2021658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f9841fa0b8866dcf8f875b05dbd53fcc4878e3ff420a0fe25d3ad31fe596be. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBSMU2021659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad03418ee6ec4abef95ff900ace6cd0329f94ccb659071490e322246925a1666. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU2021661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3220ba7a338664819b1048aea0b8b18fd939ca38f62a98acd745fba2a097622f. 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/GBSMU2021664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc47098d8fb3dcfc010eed6ce3fa5a5b30d26ce094fae52d94369ee65e40336. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GBSMU2021665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac46e7ccb101b7ebf13b32e4a414d17215090854ad026684c73371d4a5a7b8. 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/USL4R2579759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4b0a9757e530be48688f7389ed68c6a2a0e93351b5d586642e8016f5a7bdfa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USL4R2579760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26757b251a14fdb3a44b40520b40dc648f4035d162c0762b0307aecf7a0be6bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4R2579761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4027cfe7921254f46c7aff839adb52b7518c5803200f10b3011ad014e982cfc9. 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/USL4R2579762.