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 0x443bda21f8004025c5f3c8b590ac5961ba514bf0f2086a02328ca9fc3a875f2a. 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/bf697844-1779-412f-aff5-d8f5a76ae78b.json and https://artists.proofprofile.net/proofs/artist/bf697844-1779-412f-aff5-d8f5a76ae78b.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 0x5cff0ec25a10d65d2061649d55e3b1c9f7d648f22c87927006ef3354ddadf0f9. 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/FR59R1881421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d42a103fd130a1776d0cfb16271be139d4dba2bd02a21252397149f94e7e416. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR59R1885326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6de2cfd2dc21fae69be1235e673a4911c5d4e26ec9c5ac9e7f49de18a308d8. 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/FR59R1884151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a43cfae740f86b22ac8d3161d1ac56105649b6e8038419659715d60ceade4. 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/FR59R1884185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8db5b3978902ee094b396a3cd7412aa48d42e820120b9144427ae36d3aa3ba. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR59R1884187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b483aafcef4f42f261ec6afe71d31c59e24c34bdcaa95ad5464a868d42fd198. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR59R1884188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10fdcc30d85c06ba29977c179a84577d358bae0b2b84361cb417f96fc53b62f. 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/FR59R1873919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb3b6a94cab0793d45ee91e6edb63f86f6081855cc51168b2a8f3791c35feca. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR59R1873920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ec8f3efc03c71f1deae77016f42e3c5129638d68cede68aaf9b65a32adf88f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR59R1873922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb53d764c1098b5fd81829d97dcbb26f54cb489c5939ac9156a0cb46379dd11. 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/FR10S1466701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9ff5b98f45cc22b84253510e0cb4ee22ae7a51832f7c6cdf18cc3f1cfb814f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR10S1466702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4cad679126c49ac0e31f5dbc6c5e016e589a05f88153708e422df757765e94. 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/FR10S1466703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8c27729539eb750105e23d54fc970a545d2c142b49485d0315fa06989f5b62. 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/FR10S1466705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f70f6edb3843f2c09dd81051f55e14ec58684db4c00cf5b90baa8a1ea878b6. 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/FR10S1466707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca121827ab2c104bf0c3d6dd0035b334c0f46fb9c70b30be03a1475d75e4247. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR59R1871533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f61fd65a85e6da995b6b5022c2f14ea93db6c5a73a27dd957c3588d99fdee20. 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/QZNJY2273801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4971b7d4d8ec41a67196f0d1bfa2a369731f3c1f9f28c50f08550ab79c5ebc0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX202003509.