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 0x874c0a9c25bb57a5f0961aae3b3f76ee64bf3a1dbd25e5064b6d6e21c53fa6b6. 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/d2dd3fe3-d3ad-4425-96ce-cf92e97ae7bb.json and https://artists.proofprofile.net/proofs/artist/d2dd3fe3-d3ad-4425-96ce-cf92e97ae7bb.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 0x1fec3aecf9830ddd9e34c190473ae4b636fbfd066f28f43cbe2d04d132968a3e. 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/DENC12100793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388f2c9dff50fa47fd7f8d307de08ba94e48b1a98c7dec550ce70632111f142a. 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/DENC12100794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dc208c78c8b7af2158aa50330cfe9be87c8cc92de9ecfa75c3441ce4e217a4. 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/DENC12100795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0db651fb6a4c580ce8f3ac4f660979dfd806a8565502249f0691bf8bd4ef69. 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/DENC12100796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979d3fbde23bb36dd3c366b9d18de5ecce5d02d9ab825fd258d88811f809e4c0. 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/DENC12100797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7239aa7080a40b01d87fea70ed234118f1ee5595ecff189a8858d6d55c23a03c. 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/DENC12100798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010b2874568b04b9451f769468ca58b86d5702e1a7e9bdcb90ab3b3e0ea54685. 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/DENC12100799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3232cf5aa5aac9154decbebe0983bdbdc2013b015fd33f2354fd2fe30a600562. 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/DENC12100800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875d3b123eb62d537b21a7c8fc369826adaed3a9654891dc673ef600cf065c14. 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/DENC12400935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6ec6fdf53a5a26bc7fc824a9ee15442e98cc479d24493c6528b79db1a1547c. 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/DENC12400931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc55b5def1881804ba4d3bcc118407c380f92847382cb15aba3d90412d81a60. 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/DENC12400932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a50b0bdc450aed607249b70c59a15ca8330eed694684872a3a01461364470ae. 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/DENC12400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875d3b123eb62d537b21a7c8fc369826adaed3a9654891dc673ef600cf065c14. 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/DENC12400935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd161e7376ae6bdb9434607f45b42d9752eb38eb7652341cef69caceeb70b8cb. 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/DENC12400933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ceb3c980ff9c0c20b7b6c481075487dc7cf8172db971f17ed4b1ed721b02e8. 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/DENC12400934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0354ae7cd66744bf2f64e4520a5f8040b0b2a8977010296d11b9d3ccc93cfcb1. 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/DENC12400936.