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 0xedfebffbc52d798c579857ddd21a7bfbdad7c927a5cad31e3c229b30bb2e81d7. 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/b0402f90-9384-40fc-b69a-6e766c17f4b9.json and https://artists.proofprofile.net/proofs/artist/b0402f90-9384-40fc-b69a-6e766c17f4b9.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 0xa2e204cfdc7e341e17bb6c1dd1d48a5b2a36fadf94ef02ac3b4fa0087333da52. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FR59R2027273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272f006822117dd342d6e590454b807b3de8a5660421da7ede32bc936e2fdcd6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX202053912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dd795be768286286d6215d0930c2f7d3dacff28ce125bb58a521c10c96d235. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FRX202053913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5940aff5be31a30835e7f08442c3d8c259b48c5b93b40ab832e892810b73050c. 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/FRX202053914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b84000366af2ffa3090bddc5e10c9b8323a5d3c3ebebe1a66d72c3e815fb5c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX202053915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8551f4dd377cba349a97513c2b541c49cb38367fc582a9751b86537283c696b. 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/FRX281972557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55981aea291f3b43bdf94bc0553c0d4a5d7b2a3e4b2f08fb7ae58fb9088055a2. 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/FRX762284970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219c697f9c6cd132333d8ddcff659417d270e0bf70b4eb5294dc05e9c734822c. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/FRX872205235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e874bc9b4eac0f982cfcd8a369f8255338099d7eaa2cc29de13b0d5f2b3411. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:32:46Z), 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/FRX872205238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57f79a0b09de104d4f7ac2eccef651981978e778dfc313bde6dfd2ce4ae1592. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:20:54Z), 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/FRX872205248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefc92bb37c4a635b95a8d162b73e6c5ecf2cabc5b04007ce6d5fb1177f2db2d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:33Z), 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/DGA0M2370926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9b1cc87d06fc6bd519cc88e28eecd3c5b29f30b8f76cc812ef8ea5386767ce. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX202450921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12a3d08c4f4b7669353256760d0b49abbe2a6e6a26751822acb9a7f977d362a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CH6542435685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cebd0595989273336cecb6d311344a80324dbb519f35564569b68de4c2dc54. 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/FR9W12453574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d3bfdb6b28b2130be25b67917e3b64aeafb769c15e1389af79c60a749e3e47. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12464648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6b9a09ef2c96c394dc4b8e94773becb6e925c27ffe94522aab842d6dc632a8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12500394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d95083e3069948662356aab70cab5b15acfc5145b81e0076b99bce85d349b0. 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/DGA052550931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9018815d2398eca65f99539ce0ae14ddee436acf4a8962d7ab65d4056cf989da. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:57:02Z), 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/DGA052550932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5fa68b293c6c179ddcc59b8018898c73bc7601d6c60702d4341f563e55709a. 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/DGA052550933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8062c82e045683bea34917e5f1925152db1b844d620f773afff0c6a1362997dd. 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/DGA052550934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f49fc49f2de0d06085650a35bc506b01715be7c3adbb280683035e8b9a983d. 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/DGA052550935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d88f73505fb6e780821e57160593fb9e50dbeca5a2d834ac3bd54431146879. 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/DGA052550936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1ff72bd36c95cc1031d1e8a05c5803e408c80e74176fe05fa47fb834191461. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DGA052550937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4f5784d5eaa4d8f4b5d93b41c91a17f3e376296524de1fe33cb8d07ea32ba5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA062312913.