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 0x2a08faacf437c85748f66537fffa5a32260a0b14b6cbb2442af3596b29b3ec43. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7d76226-81e7-49bb-82eb-6a962a5c7560.json and https://artists.proofprofile.net/proofs/artist/e7d76226-81e7-49bb-82eb-6a962a5c7560.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 0x7c4c8bada2f006bf06cdc927028747ff183b2bd933eff2ad79a9b899136d36d3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:35Z), 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/USCGJ2581699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7472128054026bb6182fbe62d08bd1732ccdd37dfc59b5a61835da07667174e7. 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/USCGJ2581700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3583b206530e737fee516994e085520cddcf9aef731f06118fcd6b19fa96d5a5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ2581701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b41fe4972df07c6f3f73a27304ecc014306c44155f1369e6d14af5cdcebe6a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:21Z), 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/USCGJ2545060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c76a7072e85a8907e72e5e5db4886e2e41cfddcf8b4061b96a33272b0563a26. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USCGJ2581702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c80cfbdbfdf33febd05ffff3a5fa4e131683849ede53cf285fb41fc1e2684c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGJ2581703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a1880d735b79f744d1b2aa62df889958596ad96f98ece2af99c550ed10f154. 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/USCGJ2545061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a8eb7e27c19df400a219fa9f197a92ab2a390f250675a27dbd0b352953e02. 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/USCGJ2581704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b476b40403fc254aa8204c429d6ba5cbd9cc153d8a90b95a2a3fca0739706d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USCGJ2581705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00437913a094636883c19d3165cae8906a28a6d96da78b55acdc93beab8d5fa3. 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/USCGJ2581706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60697b598454078512e5592040130d003306d0943988ba8686de37e4c41dd285. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USCGJ2581707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f408d7415c2363c0403ed989270e046b804ea76952ed52c4990d4fd6154cf3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USCGJ2581708.