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 0xa8ecd4866b7f583c9d48a7873741e41353922d6ace0675bec48d9f2be75d8796. Chain 2 (Bitcoin): anchored in block 954048 (2026-06-17T05:00:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41b62ce7-d339-46d6-87a5-ef4a0e735851.json and https://artists.proofprofile.net/proofs/artist/41b62ce7-d339-46d6-87a5-ef4a0e735851.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 0xd59030f6e648028985afd083fde26aca9ca87f432e441dbce7f8350b0db501f2. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/QZES92162115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66af9aec9f4981b291f2625bfebbb8874189aa8063450b2ae14d7cb81463fca. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES92162116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40593ee3840d098a614bb9502929104d97916da3edb85b3c4e2e6e18823e9e8a. 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/QZES92162117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2310368b977ac4e5002f8b72e2c77a2a33791705fc68c449c67940206ca3b61d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZES92162118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35adc32f24dab814c61a37cd987c2aca8638ff047d8e7c3121edc6d9cf8bc2d4. 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/QZES92162119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d2b363358483b17434199a2ebb22508e88c431e18e9c1a4f349e89cbf73423. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES92162120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b4557c32a8934692a315893d1cebead1e891dbeddc580c050399b46b9c41c4. 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/QZES92162121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf636c3e19b7b3d539718313902c3cfdc50e57903206c39fb6f5c6da69197c574. 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/QZES92162122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a0f06c7caf27feafd3771578f4e9b82244bc061affa90ca993572d789e6d15. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZES92162123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7b63cdede7b3784c00884261f692d4e0f85b984bf34aa5f91721770439f47c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZES92162124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf331c11e0789370c3e6564649890828ff450c6113b0f1070a0d0be36b28ee1. 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/QZES92162125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafafd6581729dfca4c1f3aad41b9e75503a58455f3b06db14bc3f47d411b1552. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZES92162126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73991e24af9929a3e80aa9badd41b7aaa51b3bc0fa6c8c18471c213a98c2de7a. 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/QZES92162127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28678eff9dbe8dda6ad0217044508c5445fb85b13716aca4b33f5503cd599a07. 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/TCAGF2238135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea661e0c8dbe50a7ef13de59d53724ff416dd241c4b6ad14eca411734b5d3dd2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCAGD2277608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedef18ab8ea9396e32d8f922307129af38e75f2f1e041126f63b2a70d93f3458. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZUM72200789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5631e19bbda73a528af1aef1ebff5f9f04d49be82a0432bec8145080f0c471a4. 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/QZHN82415812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea9d71d5c6e9c93150de5a9ebc7a1873fad69421808355419a0be10c5ca5934. 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/QZHN82415813.