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 0xfafc8799469fec9f5dcea06995ac16c8d6545356f6d2b821376e95579d10f37d. 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/7ee754f8-cf65-4da2-ba5d-cb2feb883375.json and https://artists.proofprofile.net/proofs/artist/7ee754f8-cf65-4da2-ba5d-cb2feb883375.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 0xe1d6514269c6731c92ec08a07838db0bd796ac3e94f396a001f18b0b8fc4bf82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ1684156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566de590256f0279e696bb50cff2dbc65469ec9fa9def94ebc445f1adfad0da6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ1684163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aca10b9280b19819a2178f3d413850af36127540b7bae638f5a1c6eca9509f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USCGJ1684165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003a859cc86e6181a07874d063b74c0d8878daedc8e09a7fc61ece81aae446a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH1757053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1796c6fc1f5ff6ee8c35521b04be34fe89643f6b0b31fec6fe7cbe8e789ebe5b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USDY41939227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0833be8f3ac752c925ac56ada32bbea75f9dbcf88a54c046b6cac4fa49a7d5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDY41939228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467d28e0c36912cb03f90f471db14d86e6e0221ed69d4c62f613699d1c204e6e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USDY41939229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ffde7d819422c96a67a055cd149334546e6652d37501a417b7dbf4ec8f89fe. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USDY41939232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c87ab54a88b9b6532abf9f0418d1b99e53f99dbbe97befc8b743b3f2f4250c0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USDY41939233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f6c0bcc66d5e70c44d5bbe8a164399d61a0633052e47933d362e8b419625f. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USDY41939234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc374959d5dfd57dbc8494a395f71e48bf759db3ebfcfc51bd3ede434f8a2b16e. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USDY41939235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d520ceda91c27c47b39466095492991f059cfdc9f2c5c0446844b37fe49f57c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEN2147443.
Roof Top Music (Live Recording Session 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8a7c990d7560fdc4aa0897e960bc7a8e325178d1191c09a3db070f7202ee6. 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/QZNWU2298372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf398ede1236f90fbf600983bde7c107d1b69c8154433ffa74bc2bca7978abf37. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTB42257183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca5d041b395cd25fc0477cfc4f15968fe47a66b3785d2cad4982f9c7b4eac1b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZTB42257187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1793439f72438b3a7bcbfb3cd28f63f5b3fdf55ffdc15c4a0157480d1f7ca98a. 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/QZNWZ2415088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a8b5e35dff7d9943553c58cf3929d622ab13cf071629c725f33393061b835d. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZTB32461484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92e4b5a91a6b8a9c85fe694602006b811ffec1fe5d60b59ba0e6e3ae78a6e01. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA42577660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39ff9664f353d49053cb64339ea4c25a8957ad973e78193c654f490d5d8cf68. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWQ2594896.