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 0x9f9584e2f6e9b02bd404b12e23e459231a49236bfc11386ae730b011d9d51020. 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/792eb03f-ff23-4542-ad4e-03604b2a28e2.json and https://artists.proofprofile.net/proofs/artist/792eb03f-ff23-4542-ad4e-03604b2a28e2.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 0x2e92bf76a5ae95ea56c088a25b8306652e22b622d87296e47dd03e15c956d32a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BRDPR0500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a93aa30481539e8e99059986e9547c02082cf08b0213c116a223b182d1f1f27. 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/BRDPR0500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2651eeeb28edb4fba6b1b675b1cb45879616e5727374e36f2db7d8d4a92c9c84. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/BRDPR0500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef93a6b8ee87605af8078bec087b115970510abaafab9b2b33bef06bd8814fc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRDPR0500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee5d2a8ce6a83ccad3cd7d42ecffce51878f2c324b44ac281cf9ee794f66201. 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/BRDPR0500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898445741098b4550de8c5c3c0414a24a249a0a46ae77308738f53b8798c82e2. 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/BRDPR0500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d70b260f41d2453277d81f6bfb048cc49b9aaf1c26aa969436fc907a773933. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/BRDPR0500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512ee1070861496201ba466813d8e380c7901e977f3b44ee8d00c7a1f28cf3d7. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/BRDPR0500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2cbc0d02dfc37d19b7487eadce2b0e59468f7bec85a6f198efc2755ad1d37a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/BRDPR0500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512ee1070861496201ba466813d8e380c7901e977f3b44ee8d00c7a1f28cf3d7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRDPR0500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e65cfcdd8a733d35a5c5ce044a5b936b586512bb18751a2ac555bf3ccda7ca9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:27Z), 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/BRDPR0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a35d897d26e88d9a65abb8150b6b493548bbeaef126dfc4f581ff8bea2976. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/BRIPX1100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1123378dc573da629fb050094c227db5a2204e980326aecac25a969e26b3a5c7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLRD52099986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6121f7a2bcabd5654ff3dbe0ef952b73e82bd675bf8e6e23d35ef319ea8b3c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRDRP2300001.