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 0x1e4b2a8f232c081d0c214e29ca7373a182841e8d073ec9ada21ac7cc64786f81. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58609256-872d-49f3-87dd-ea71155d827e.json and https://artists.proofprofile.net/proofs/artist/58609256-872d-49f3-87dd-ea71155d827e.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 0x326d702e70c4be5dd2ee3f1390a52865d08a040cbac6675ce7d055428cc7a94b. 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/QZNWZ2129042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe152163f91cd59e2e23725d2071c9fed594df0e45612b5691b2a6a480879f41b. 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/QZNWZ2129043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27990989c09c4b7f5d9b6e018bdcd8c898b5da5db32f820be7da19d85ccbe2b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:52Z), 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/QZNWZ2129044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bad55e15243ff8061e271600648810d92aa97ed51b731ed07184210b7c2290b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWZ2129045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35ed47f7e96c433431ee0a3e1d5ff9220ec7ba6a165a7955f5d2006e8b90e24. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:55Z), 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/QZNWZ2129046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb560ed8e1eb677eff99b8dd8ed6b423ba215415dede6de0a0d4a2e9589415ea0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWZ2129047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951ac93f0259a8c13fbcb8fd481a7937644b346ba5c96f35824b7a6ee95b4c06. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNWZ2129049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf714fa9585d73c7d65dab9a272e54bef43872d5c6020afa0113058420439535. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWZ2129050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9133b88cc71efb2ad5a070d89017ccfce6b8cfb707c6b00165eac9f019895. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:26:08Z), 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/QZNWZ2129051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c12408492163766ecb57683fbaa95e7a4abc98f4f8fb5a8829fdc4163c978f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWZ2129041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ef18370c8071bdf66f7a7462ac62f5bf57ff7a356a0e488cab93aae2c4030d. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZPLR2113126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f6854962cdc4033252604868f52f2d07b4cc882f7e690acad724ccceca34e0. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZES82221720.