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 0x4551b6900c4284383d67ed0a255232dbdd5564525bbd17536eedd529d4526eb7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5c2ac7b-5bdf-4b5f-ab0b-0dd9f0780157.json and https://artists.proofprofile.net/proofs/artist/d5c2ac7b-5bdf-4b5f-ab0b-0dd9f0780157.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 0xd71db7728f8dec458396f017fbdc2a54772e35ecfb56f4587128aa68da911f91. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDQH2370165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a92cf365652871e83015ba0e12e39541bbcd42c10eebbc2d9fc8f085a69952d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDY42188805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d415072c227bf207eb9b988f8317248c57401b725b99ae3ecf576b2f01af205. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDY42188806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc45a72ccb011f4d4acf4aafdf6e3847d588c6ca2052dfd1bd9e7397e8dafff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDY42188811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72060affe04c373d903e4f5a644995226ba69950bb4e369f44b68575f768bcda. 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/USDY42188817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369f3b5cf6d0bbe18dda1b1ce2e64e9647af4dd19f002921395123b8b8761d64. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2085327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c813124ffac1a34cfb8d0ea61af5f2aa16e6c0d65bbe15485f47fb2061640. 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/USANG2085336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f732a58489a127bb1589c24f75ddea95f2d61632e4802aadcdf303efe362a2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDQH2419565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75382bef36e51399809ade58b543de9bb47b9732e0b54f56d3365c8e667b7ca3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGJ2474713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb005c3a0c95b2724bd62f9b3b95e0d83747f44008bbcdea6379ed8a4bad55442. 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/QZDQH2392578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999b9b51a5f07493d3e0dfa27e062900434c0b39ae187f51bec2a26804df726f. 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/QZDQH2389421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c24a825e7564172aa782ffce2aa5de1120bc888441dfe503138ef43370f7fbb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDQH2350764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175f275024f21892d38301efebce1ab67469e18af04f424efd9042ebce95f288. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDQH2501899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55353eac38aa161bfcf3c02885f75b3d096c671b058058c8428095ffc7d38dbe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDQH2445298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ce089a75750bc9ea14c04b4a47a2105a8e6821816a0ec0dd09ddc7c5b4002. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDQH2445371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6318b3e0f94076af0be4661851d0c1ba3bb29448d47b57284347436a7f59c79. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDQH2509264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08215cea25081601e97a655b9b0d9f57d9c1a822ada2efe861278e47b5dd8db8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGG2209632.