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 0x2448de01fd9cb5490f9c1acdda74b8dd0ac27de01bb2122f6b07ec429c1df7f3. 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/f59f9802-050d-4cc5-9cf5-2ec35fd22243.json and https://artists.proofprofile.net/proofs/artist/f59f9802-050d-4cc5-9cf5-2ec35fd22243.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 0xee56b6228575cbe8a87477eda7fefbb0d60fac0482b354da5f298fdb3784e751. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0M2458922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c4f8144c0d602c03f91fab87d64ed1e761b88dc2197c357ca0cd7e145b089b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0M2428998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5665734c276834d265d52bc87c3d8a9ac6eca5b0bd39d958a04dbf6e1470161b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DGA0M2415466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b68c1e6b9108dc4c67cb6bd579c43e797b51226ba526f2c308efdc6481ae9aa. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/ING642409275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bcf86f20797344fd3ce4216983e7b0da1b3b018686cfef3f9ec3ce7db89f28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ING642408425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56313f22f8ada71fec40e5b9a66644eac0dd2875bf9ae37f7a478f2b08f9e6b8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2535903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76cf4ad2a0bc94091c181b7c2adbb355a4442ffc855c27bafce24b9d0cfe0a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INV922500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e61c1330e50136131d3f33c271aaf02dd61d5e4a51efdf38b7a0574628f5e4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR59R2535899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a40c041b8a8ffce35ecbc41070905d4d209744f50c255e9e8b7e53b47c6fea4. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR59R2535901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416143d0b126fcd3395007370deb21aec628c5c9d2107d6ab2bc979678050a2f. 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/FR59R2508276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede24f2b287030284cb0fd16e26bd8be1dcf43e44f967f1ecb909c969e4b3378. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ING642502239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94727bc551a3c9ee7e971e3f5fd97c70c14eb3d3bee3390830738da636418903. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR2X42514216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9465a1459f90a2aa26d9d88e8eab107d17e32b2a01f6120212980ee6a3a03392. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE57V2410319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49793d5e8af007407967a406c5275778d3096b66835f24e276b4d527df68827b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FR2X42500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6025e94b53caef8524e7de1cacfed37329f20172dc4e0d70bb66372ba20ffbb. 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/FR2X42501983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedf35974d4c5fbf67b0fbbb10481fd7e44fa2e05015e89aef187a151d5602f8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S2592277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b51a10ecbb046e573be1b37169057dde6e8209b379da515eee6a7fe9b1db97. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FR10S2557808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9572c7fa409b88c2e69a9152a6bdf386481cc08a5c703720c1df30d2e932ec. 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/IND832500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560a11bdb7e14a8dc85dfe65349a367b7352278b3f4ce847197a3e8c32309e00. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DGA0T2443834.