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 0x2146fbaddb4a04e7ad30df203e3758adb2f0e6adb3ee921d211c08702bb4489f. Chain 2 (Bitcoin): anchored in block 953820 (2026-06-15T18:35:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff3f393e-f66d-423c-945b-66052f08d4d9.json and https://artists.proofprofile.net/proofs/artist/ff3f393e-f66d-423c-945b-66052f08d4d9.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 0x8f2e3a2deb5678c66894d5abf410667ebfa1b97f18db896f1376b9c2f15f2a58. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:01Z), 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/QZDA42597719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9875d6986973ef52d681036544c9ae57ea9a823284fef2ff19dc6a8d768848. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA42597720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb2416b1e910c638598d3cc078b027555bfafa9533a715fc2cd73a4c7d6ec7b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDA42597721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d1ac7523e4f65b5d912e0a7f9848d9ffe561c13e76f54f89f97e353c3a8c97. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA42597722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c37ba298a7ca6145acdd178dc5cff56946895a010af6abdcda7ebc3c1992a7. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZDA42597723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd168c53e54259ce2bf85ef50bf8abbb8187f7dc8eb438012378aee7ba21efa. 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/QZDA42597724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe964545bcd759d1d1538045f16b63f07aa320c67224b702a4145ed86a6aeb197. 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/QZDA42597725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520f69bde9931417eecfdda8d3cc95d3149aa71dc6c2017b95223113d1a97291. 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/QZDA42597726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775cc0376e895b2d743c173be12bd7bde1293b10fbf4e4bbbaff1728ee187912. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:23:35Z), 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/QZDA42597727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b632b9e53107c1ea07820c496e577ecfbe6d74b8d7c14d63bdcb2e61096d3a. 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/QZDA42597728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc90a6d2828c513d996218b665a22fdbc667f83ddd1173619c4611eb128357f1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA42597729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d56adc006cd61eaa768e4ee8c1ccd047c6052f92524f9818e9c58111d198cfc. 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/QZDA42597730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9614f48437e1953ba1d84ada56c97b0183169cdd5dbb4b389eb9d5d1096a36. 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/QZDA42597731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f3bef190512792dc94bb40c596af599294e6a104230041ef660d8bfa5adb41. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZDA42597732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea89f8a1afd3716e909b93aa3d49eb3d8ed3ed34779c91b517617110f6de5055. 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/QZTB32523137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ed7010b775415f8f34e9b61042ff12b7b12efe831e9712eb1f4dcb800b21ff. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:27Z), 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/QZTB32523138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0075a305cd5d122e0ed01e03500b9a9c238aa2bc8b664a501ee22b74268b2ddf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB32523139.