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 0x27222f33c42a2a219f5d370a9b0fc686610c417cb426638f410d1c8155f950eb. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09d291b1-093e-4e5c-871e-395ed3b5b970.json and https://artists.proofprofile.net/proofs/artist/09d291b1-093e-4e5c-871e-395ed3b5b970.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 0x102d12c227c1471846d07bceb7b7990298143e1d06c9c2b38ebed21d15435a6d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USL4Q2060243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7f108fc25993761474b7b6e576dbee80c6f0edec8873324ad49214dd899c66. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USCGH2146028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6fc83e8b3c5dcf8de90145cb4d95c7108cbd46ef880aa3cd51ee0ee209d982. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:54:23Z), 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/USCGH2146030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79c2b524dc129794d665d5eb3ce2e031ffec2dd558e67f079248102c5ddee1b. 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/TCAHB2315243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd337cfc4bbde519bc0371ba5eaf46b7bfed2130fa8a3515344add2ae6291e9a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAHE2303456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c388283e0b8a78473bb193b416e89004ef1f37bc61a63538f0082aa3ec1bbf6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:38:43Z), 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/TCAHK2371843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6bfdbd0d4c1b5f6dbbc4cfb0b8712ebed5eb70a45737da02212be30715251f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHK2371862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661c267a5aae36ecde63f159be3972ba31499a009d8177ca019369a173e88bd. 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/TCAHR2301992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8890ec7f4c528677842fda890b92febc357f336de5d38998fa5c07285f553b3. 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/CAM372400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5edbc016a0b28df4412391f9f4c6a7a505a3c2da2fc7df5ff71c72cef1d20e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:41:07Z), 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/CAM372400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530047c27a7a54e20004c75eac774c4e11fdb21b706191c206b468c8ed50dbcf. 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/CAM372400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c2d820a18f9d445918667d9172ab4f2c335042e2ca70d44a6dc5eabf01a57c. 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/CAM372500130.