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 0xe8ef5ecc23eeb7709f8e2c8e56be99fad0a67cf4f9b6f54b649020f17992c775. 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/acdfe14a-212b-4cd0-a512-b791aaada86d.json and https://artists.proofprofile.net/proofs/artist/acdfe14a-212b-4cd0-a512-b791aaada86d.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 0x451a073fe2d184378a62a020872404990ea8f1914266c2c752027207b00791c0. 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/CAGOO1971447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65a950267d8af5d1a6d8aa3dbd3acfa122183f7e59dc3d48e9fcabbf9f12bf3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZFZ72161561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70486b6e48191ddfbb905347c154022790eaa0903bf114fe04afc260e35af4b. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZES62107919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0150eeafb8d301eddb7b3b0a0f60f88172b98edfd90034cce0d89a99de93ed. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZES82164442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeb12414e3387de9d3730b4839ec65aa50977ac548fa80ce02825f8dc82d877. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZHNA2109725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337b135fe45038da6f2d7ba5e9c3028a662557288a4e6a7253e10421bd33d5cc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZK6F2158885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36812bf35fec90e0ac7ae16cd2a4ac9b1d53783f0dc8fd9f4a3bf04bc27209b7. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZES82286713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f094dc44dcc30018f07f6ef307ea218bb9af582a048cdb9461555348c20ed52. 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/QMFME2282994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4cfe829eb49b27165d4576e6e35a4de8f849d862b1b5a31aacf3a6578c3478. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QM6MZ2394527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d406cb6fe918d6fd6086945b3141a872c319fdb0600199f41392a7ff230072. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZWFJ2391502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e074503a757b71c26e2b3782cf55be80fe56fc5896374003389941140b991d. 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/QZWFL2476465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3903e5022bf87cbacf324e05dc79ede8a18aef5aba000c3dd30ba4e542f75e8. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZWFR2482135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd6bddc19a4a02c1de710503536e108f40d418d70b69b0d4edcd96f97cdf492. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFR2482136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63b55699fa7ced16f889450935d7d898712098b55106ace0b7d0d7e9925df34. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZWFR2482139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd505db604c18ca3bd3211cda95d72aa9ada781ef177a035072b4a7c37c2b2285. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES92556329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662bce6f99bf6f10deddc05fdbc1878758149e2ed4e236f73219a1fc94f2132f. 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/QZFYX2091550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ae2010da27dc01263cdff400db6b709a3d724214346a54de1c515795c9dab2. 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/DELJ81948256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90efb05f020149da964f384c232d38cf1693293f4f599f173b8284e43a37975. 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/QZFZ62044591.