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 0x0f7aef29ff8828ddf89b230ad57578e0d9686f21479b2c82f10b8bc526414ec7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee1032dd-c46b-46b2-a2bf-e33a044eb7ab.json and https://artists.proofprofile.net/proofs/artist/ee1032dd-c46b-46b2-a2bf-e33a044eb7ab.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 0xec7155325e95a6ee62074333cfdbda63754093b6d2d25b54ce3e749012948a4b. 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/FRX762440269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff205719e6c9a2de438dc0c9d30945f0cfc8c5887f7037ba94d7a20698ef0581. 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/FR2X42455430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d19064f6f1f3a3994c192b4b9803d17fb83f78b3930531ae33d90d3fb695a2f. 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/FRX872309159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feac63fbbb8187114359ab7a83b1f50771fe0173204689cd6150c1c13d027c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX762384721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf54d606c0136c269cc3fbd6665e67de6d0276f5625b0e375d6377a82c171dfe. 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/FRX452360417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a00b600e4dc7316fff5d3cc5a2a71939732cf42f86a85617318a40109e948d. 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/HKG732138421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbe732039056e85caf56120c3446755c4c2b651193bcc00e050e10def4c4e35. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732141396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95efa13cc0987685eaec80f62b644fb90be30edd12f86d2002076381263d5b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732104521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484311e718a62acaa6b4410b05e0305a87ee52ee1503c3453f8efd01b0f810d1. 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/HKG732102809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c71269ab113e2c5013cff11f70b8588f91c5d658e5eaa3f630731c0296b849. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732102554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf233da3b7a80cb00c68409426aebd6437864ff54e7d0fac42c1f41704d4139. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732297439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7e6489da5bc388b2fe587da92b2d27684bbe092f250e34a15b9a8c5f5b4aa7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732297440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756180b7f4b835e0fa41d8d94c9b10bded8da6615c055df76518514c5406b687. 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/HKG732297437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e08cb361ce59540d22f1737cfce01e8edef94259158f4ea131f4b433d46b0f2. 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/HKG732109469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc402fea7a4f9a6221d715583f62d1bf3bf04e78ec75e8dc6cbe52d2bedc06942. 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/HKG732297436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b38af479cd678ba207d827388321eebb6679a507591ae4150f2eec6b8e8311. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKG732297438.
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 0x845ee9b712c165a1afc941befef5074c0c531cadc297d7a5873735b10b22a996. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732318403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3647e4b715f539dc5e0d6ade6e80b61047b845c148cdcb1d331ce99de9119316. 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/HKG732318405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e96fd3ae7232d5dcf131b4080d5ddc57b378cf55849dc3ad4ecb76636902796. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732318404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f05af9ab24f3317e235b4fdb348da6d18a05a7275697b2af33f237cda650125. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG732318409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f2386324d4cb7d0efe4e8c285c3cd14fc5ca3b6101c3e7b81f586364fef915. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732318406.