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 0xe5efc7c28283f86c7ca3a15da56506854fcbb1bb5ee52d969d71de3c61df01da. 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/7db22058-b827-40eb-bea3-139e46a63d0f.json and https://artists.proofprofile.net/proofs/artist/7db22058-b827-40eb-bea3-139e46a63d0f.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 0x39a6944f295419eab756aacd741e39931cf5a4f38588e4aeb21f64ca50a0a576. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFZ61916061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4343ab16f6390def659c4596db13044f4e7706a46b73de51c8e8ea641bc322a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZFZ61916067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa444783c02e9126b06f3b1e6fd178ad0fdb1a68e00ede37e5b5891b8c88022cc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYZ1901635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8483b1ffbd9b4bb33b713c2f5242b86d8f5b3a34822b9c1a9498d4af8ea1aef6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA82032466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a772922817d0737bc79cc926d335d29cfe01460c357edfbc9211823ca04aa2. 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/QZ2J21507944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81ed456ce6676d198db9a96ae72991cc338ca70399e22bfc5f1069904976fcb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:37:41Z), 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/QZ2J21508057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398126dc99243ee42f82f7e37cd07f83b93326d605825fd2b76d217fc8808fb1. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:28:40Z), 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/QZ2J21508219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941f38c1d472e94f01a64bfb1efd1411d631984d5933b790f50c90de6abcdb03. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ2J21508220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd973784476ee725fe47c9a3d2de022d58cb047be25e1f0f27e2ac4f10f7e9813. 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/QZ2J21508805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d5bf2cf06a6c9ea57519e7593dd4843493bccc25d9adddf9d5a2074f525952. 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/QZ2J21508294.