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 0x0016b085bc14f19f4e59b8a7abe810d4da86d94f4f1a48e12021147b6a4e224a. 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/ffb10099-82de-4594-9120-d23d0976397a.json and https://artists.proofprofile.net/proofs/artist/ffb10099-82de-4594-9120-d23d0976397a.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 0x057af377fd9649f3d25dceee373ff9b8aa1e91dc0e1095d9027a948271aae0e5. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/NLS6R1701347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2344368c2ff121dc0c72520995b63d0bbb41ba3c4fd926d47d437e99ac29686e. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USA2P2026031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecee6b4101506dfc04fb61d22aaaf2f01819721657b8b7a0bbe00389002fcfb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA72268980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ec06c70ec7f2b8689933093d4c1931edf7ea624dc8c02036ee2f470a03066. 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/GX8LE2215745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f20557dbb9b00c2cb1ec55f7054ab7013fac0fd56f72acc293ccf620e5c2d9b. 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/GX8LD2366319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcdf660929912baa7fdbeb510f275a14f160a9b39a11aad1e2675ff5d04473a. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/SE6I32497856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc58bb5169cd5c0d100dd654df36561b5fdea42c5a657128181a8f35821e60c0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US38Y2406608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323e628c5d243a7fd280db45e1c59de6359c9905a67ecfddb26767b3a03a8f0f. 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/USA2P2042354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d932798dc6deff39f954ae6edf8b7624f2f8ff60eb00ffca18fdba82b36a2e. 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/QZHN82291263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b8b95a5f1e853aa0b501147fbe458b79afb789f00de55beb6e3dcb8eae6107. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZWFK2316117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd3ea1c6d8a773e55b658fc664fd5292fd1cc7e04d0dd9e34485bae0b613533. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USA2P2024540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f264837f88e655400ff03de44bf54f6dd398ad879e0813bb09ff69ec694ed9d. 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/QMDA72296510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c3fbb7a10ca16b0c3b5c41695eeea80cfd6c516db35bc5c2b7498e25e388d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA72219867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda039290327342e2208ea3651bd6bc57b483e924d6e580bceafa4e8b659a9c15. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMDA62214227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733842b0af4475d593652f167764846daa5c27ca74dfcf0a8f51d5049a57929b. 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/QMFME2348501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee96b087aa810b2aa56873172325194310f0c5e8464618f20bae2a505126bab. 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/SE6TI2371209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c62d11fe8845346b823ea23a9a974346c16583567fe57ae9759ca76e7ea704d. 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/GXESV2401973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace924f45e48201ca8b7ba0ca0d3f23490a49f234dbea3a09d595f207901cd59. 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/ITKNK2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608ef89c97ddf739e23b769997dc9375e7911c65d615c7b0cf4950b7c1a0ed88. 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/SE5BU2508034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96495d099fffbc94dc83442db0c7318e3091510946a2e03b1435f10238a2348. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SE5BU2508035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf553e9117c38c969ecb4c9412a1663afb67036a2df4dab1a045e4c4ff8323b40. 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/ITKNK2400014.