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 0x95bef5040e71c3efc5503ab6b9adadcc96f8bd57745563fd994e17844db53661. 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/f9cc79a7-84c1-4420-a135-a4e6c0aaf873.json and https://artists.proofprofile.net/proofs/artist/f9cc79a7-84c1-4420-a135-a4e6c0aaf873.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 0x932d6872fb780310ba6baa1f3797b462b43b08dbd0df721aa3b7919bc24241fb. 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/GBHLW2301762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43e780e8ed9691e8e13fb2cf896144a4d8182f00cfe787a08e6e50d2ac1faa4. 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/GBHLW2301763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25da73422ae67c7f42fcba846ca3ac919d1bfcdd8e13ad623c24a935b5a2512. 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/GBHLW2301764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365923d9360927cdbf2c0202077353e16851e4b820e0f8845502c791fe166b1f. 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/GBHLW2301765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459d481bee02a631108eeb22f7ce03da05cd70de7adf1ad0f303bf628c4ef773. 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/GBHLW2301766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c31fab89d9c003c66c746c1944b427fe7393fc2014d091cfa765121f82de2d. 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/GBHLW2301767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfb0bf3eb5af1b62757b3face27a36ec17f0e1343d83b71e6274e4c468daa83. 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/GBHLW2301768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621845e78f0ba732da6c2b8834ecd91b7be4b68414f2b5d69ac595254172a347. 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/GBHLW2200961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347374d3632c214ef576cf519149bb843c5d2abf0b5b3002f7c06c0f2964e62. 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/GBHLW2002824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eea943677d6767befa0ca4590146d7d7d74cf54fd00bbbe48494f41e4a856b. 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/GBHLW2002825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ca6b6a55726a78c5a5629b018113740c57fc026c67baf113c92ce544110ac1. 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/GBHLW2002826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb889e2d5371c12b4dec9e03aca103121c0c37cd949fd830d9dc8cb9823f45dc2. 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/GBHLW2002828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a9d4c6b891a699d6fff35aa8be8a2bb488e5adf04233724a5c74b5d5e62a1. 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/GBHLW2002529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adb477c3d2183c8e69d6412bb2b6e4942cc366212dfbccf631be1da0241a89f. 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/GBHLW2002530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06758f9b14f14033302b02f07ee583f1ecaf0c6e99e3e04006d9c6ccec2bcdc4. 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/GBHLW2001440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dc021ace7210f20dbf1b389f7971a5632a1280188327807fb781374f7ef4f2. 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/GBHLW2001441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bd6d786a71d4786da2a41b49e93d7f835806240517df2b991dfd94d7f6fd99. 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/GBHLW1900336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c5bc5d5ea9f3f30d63f4cb28c16fc61bb08bbbf7a2430019c835e875a9e56d. 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/GBHLW1900337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073db39ef363c4735faf8f38c3fdac402e195f50482b7fb4525bdec11b3dd256. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBHLW1900338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bcf08b0dbc123bb61c917bbd98312518c8fcb4c616cbc84f725e911635c0ee. 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/GBHLW1900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347f3dd20024f6bc2fe9a38f1b7c7b4ff0e03ab267ad04608f788080d8b742d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBHLW1900341.