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 0x7ff9210e3ca90f8ebcbfd696bd25b13f5540d5ab548da530f46c0144383ee650. 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/52954169-e321-4eff-8d8f-8bfa8d25f723.json and https://artists.proofprofile.net/proofs/artist/52954169-e321-4eff-8d8f-8bfa8d25f723.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 0x4e8835b16522c7bab3de752b69fe0900d208ebe2bc36836652cf5211c1c0c868. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:21Z), 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/ARPCO1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6918cd57fe6dff1c748be4d570f0a19d9cb46538123a8a4ec2160bac0ed05b. 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/ARPCO1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eda8ab708e7f9501334dd8b2518914ccb7520592879cf5aae89094c75b8529f. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:05:34Z), 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/ARPCO1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1616874a001e25af8c6d13815ac13921cdb9e3718f4306c6010c7083cdd063b. 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/ARPCO1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794b72ecefe30e5da080250004c420708dd57c33e8b5661f6edc75a29816f95e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:37Z), 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/ARH0V1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f723b42e0d8c7da662f6cec088fdc348db08bb39fbdc26046bf1b087fcdd782. 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/ARH0V1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f5c79d6fd195322d1a10ee68d0211e4c2d9a64f008d87dce585071627998be. 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/ARH0V1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8bbd729e72c465bf8b94b18a98614db11c007668045accda6d4e69dcdf6c7. 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/ARH0V1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d3c33be957ecd79389dc63d679e05d23ac5bd2fa6cca215a43621918cf2e4d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ARH0V1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bffd06c81cc858207480b2c098e7b9a522a1a91af403426474eef70b58f9529. 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/ARH0V1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf51abdb06197b1c064c914803ad48d4f706116e4bdf259d843d5ae1e191b9d6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDY42185378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52ef2c3fba7940585939cd197aec79a3b42351f2395faf224873fe69afe0eab. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM82368417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcd39be9d0cbf3790ca01e2ebcaccdc8f934655d30029c3c79332fd779767aa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USHM82368418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded3c4d3c8983e0b03cc363a420309c26304e40c6d821c594bdf130ae58ddcc6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:13:18Z), 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/USHM82368419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37600544507e4a432aca87ecd136eddd7d6c1ba0fa66836bf89a1d552aecebb3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:17Z), 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/USHM82368420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8880bd67ee825a7ed143edda67d15212edcc5aa5be44abdfe5241b4dbe5eeae6. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USHM82368421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec8cb63179d32961df17058f826788c2f1707d804731068f403d98c1dd10aa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:11Z), 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/USHM82368422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3501c5af2be2e868866d126563dfef7a213535eca82d52ad53db09d8f364709b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USL4R2325253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1b5d9bd1eced5d72292cba40351fcb561e747f923d6c4aecfdbd8ad0d6797. 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/USL4R2325254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00308e55a44df972cc745cfeb8c574e1c7319f162da26147d2ead189011717c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USDY42471211.