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 0x00b798f3814f74474073500920bc40f06471ced90d4c30ec467efbac21438a92. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/970d8ee8-259d-4ac9-9202-439c39fef411.json and https://artists.proofprofile.net/proofs/artist/970d8ee8-259d-4ac9-9202-439c39fef411.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 0x6f78949211af916545582021b36221eefad7c4156d4ff75d4e5be8864d5326f4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEUHA2001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a64e910995bb34621bbc099fc087a55bfa2947de35129754565d5cd5c883af. 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/SEUHA2000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158bc3016d77c57c52b4418f056a34cf9e83a0c05386144c0065dee87f82b7e9. 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/SEUHA2001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9121cf529293aabcc5940696171bb044610f0837d4297d54cc2c291e91335f. 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/SEUHA2001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf722dfd2c20504d79131e3197d54697e11f9dea55704b3cdd56c52a5ec0019. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEUHA2001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4520c926477da75ae251ed1b256f9a26c567ea7b4f9286ea781fce08ecd312. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEUHA2001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05e41f2c951ff660ae12e71473402232a2f0fa67c95f4bb56121644d752af2b. 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/SEUHA2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9121cf529293aabcc5940696171bb044610f0837d4297d54cc2c291e91335f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEUHA2001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158bc3016d77c57c52b4418f056a34cf9e83a0c05386144c0065dee87f82b7e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEUHA2001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d994b876dd41207ebb3525b4961d6517cc502c8efb17454c4be153060630d9c. 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/SE6EF2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ce97de90c28794e134aad94aa2a14bd2033c02d4eb9875586b24349890335b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE6EF2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6ff827b9fa9cb8284a887f5555681c5e410ece4e1af02ed9d7b47cdb448788. 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/SE6EF2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be31d242cb8b1c54629ed48c5122b845e84c0a334d08d864239ecdd021a2582. 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/SE6EF2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb6baa41ba1c6cef91a2f8b292c4e2baaecee0b186578e6acb5c94680204c16. 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/SE6EF2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a64c709743f8e15c46104f8a1101e71b0ef649f5e763515f3868de9a4c978da. 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/SE6EF2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fd496689aed9c1440b62ceffbfaf15e79ca605963b7246c9241ce317c5e238. 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/SE6EF2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1aaedfcf4d5f4fe594c917c0f297562fdaa9be9e953bf46edbf39abb0332f8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE6EF2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471d0f6de4efa13828907cfafdfdd5fb8db2617af27e6054b096dea5f2749ecb. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SEUHA2001001.
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 0xc5df76e2b01809cb3cc7a774ff65c21bbf55c6ef7193c6f9afe8149bca14b202. 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/SEUHA2001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b7321c96ba772d1d832db0bd83824a9a10095e73f4dbcfe472cfe312923521. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/SEUHA2001008.