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 0x4438403fdf298dc34a1243c74b0711668ccc0a48dfd5925ad395c627154887ea. 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/f146c86a-b52e-46ad-a1c5-04ec8d219a33.json and https://artists.proofprofile.net/proofs/artist/f146c86a-b52e-46ad-a1c5-04ec8d219a33.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 0xd11170249c9736eaa76cbff390aa2b1ada07a1c2d04b9f428862e8d5fa0d041b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB1973686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da7da6c0f4c468716a152d67328944318c017c2311c5b3f6121629185e0bdb6. 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/QZHZ42271871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf492d03355b709a1ca4d18a27fb6af1b581aa162154dd3d131eb5120c575b07e. 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/QZHZ42271872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76009ca733cd51bc88aa4e8c460cafe80c7acdbdab1ea99ec385f1f641583f43. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZHZ42271873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce80cfeea126b51c74932c1f48af8f7a8706bf37516ecd19d4a3a68acc5b92f. 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/QZHZ42271875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808a1cc97cc6ec78b979c896d3e663a318eaa259b44c963d72854e754d3b180e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHZ42271876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf586b67e15d9ff74c2830db61818b82d0ddbefb0a271301aef65e05628a0475b. 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/QZHZ42271877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca44c4e4281545ae8162fd3700803d1b406646d4a25f70305f55b251795ef19e. 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/QZHZ42271878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce53a55da553114e47bf6b087de4e015cf3287748d2c4ec87a69bfcfceb399b. 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/QZHZ42271879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab780a8f000a6b1f39d94ada36caab43c98451fa19f7570c4ffcef63f9cf1d8. 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/QZHZ42271880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aea39fb8bb018195dac8b5a49bd136a8d943e8c8743789194a3085ae60c39c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHZ42271881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8782e8d27f0c1d4446ba9d74b8e336b1f3801399aa51104b8859b7b86a55362. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:35Z), 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/BCE7P2401348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0eaee984a76e68a8815e60d6c229bbfec5758b5bbd0716d3943345ee6d6bc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHN2063592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea6c378086fac9897cfedd146842ba2a8477c38c37c0e156614e49a684d8224. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRLRE1000036.