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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff9210e3ca90f8ebcbfd696bd25b13f5540d5ab548da530f46c0144383ee650. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8835b16522c7bab3de752b69fe0900d208ebe2bc36836652cf5211c1c0c868. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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 0x5cbe5818823ff6cb30b0a1a0c0c539a367e52ed68290b5f56fda1306bbba7c66. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/ARPCO1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6918cd57fe6dff1c748be4d570f0a19d9cb46538123a8a4ec2160bac0ed05b. 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/ARPCO1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65fe8315bae5b35475d91606d3a53194c0109ce6c6f5708b0679fc1f4a76a48. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ARPCO1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eda8ab708e7f9501334dd8b2518914ccb7520592879cf5aae89094c75b8529f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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 956822 (2026-07-05T18:48:28Z), 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 0x2631dca422973b0360f2a4a30917a65b71f56bd7276b5e22cfeb96e774d54cf2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ARPCO1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc25c3dcc71bf06a2965dcd783977a6099c94a5c6cb34cadcfb2e41448f021. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ARPCO1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794b72ecefe30e5da080250004c420708dd57c33e8b5661f6edc75a29816f95e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/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 0xd167423af01d7d9919ab8fc3c63a1f07438eeca2f41fbf3be07dab0b9a0dc51f. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/ARH0V1900008.
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 0x14df7717c3a2be9997f3211519160f13913d3deecc22cd256545e93b9c5505eb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ARH0V1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf51abdb06197b1c064c914803ad48d4f706116e4bdf259d843d5ae1e191b9d6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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 0x9590102b50dc9b0dee3c4decc60b7f65d925a4f3a69102914c628a361bb35165. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/USHM82368416.
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 958376 (2026-07-17T06:41:00Z), 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 (2026-07-16T20:12:32Z), 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 (2026-07-16T10:20:17Z), 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 958622 (2026-07-18T22:58:55Z), 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/USHM82368421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec8cb63179d32961df17058f826788c2f1707d804731068f403d98c1dd10aa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM82368422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa557593f335e3ffd39030c4d8fb3c74597b842125b3d52765458332e989cdadb. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USL4R2325252.
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.