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 0x08ccc63f8c544871178372f0dbedb7346442077026469ca5a4a1dac5572bf503. 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/a5410148-48e4-4d0a-90a5-55f05f60a1be.json and https://artists.proofprofile.net/proofs/artist/a5410148-48e4-4d0a-90a5-55f05f60a1be.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 0xdfa67283d2549f5368f2daedd6ebbb8b0599f341db5e9c1bea4b11004eacd30c. 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/USLZJ1725709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc1ea2642bccaa8985bc79a672c64bfbf947332b8b59ccf535a8d2c414a1abb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USLZJ1742583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7e724cd8d569a94683c7ac25e49cde05225ca29c2206afbb077277de6300d5. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:56:05Z), 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/QZ5FN1785213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92f2f257fe0e0354e4e0bd7c477a72a20aaf4982526434c2236ac9bc80bb05d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ5FN1846505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057e7c278f67514887c3654d4ea73e4a4bc0082888bed55b37cfb047731e70b0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ5FN1883946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eee32a5eab033c6c8ec155bbbe596f151976927f02b915ab3548ee7b795592a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:51Z), 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/QZES61887101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5685d7cdad61af22aba9a920eece6c18fff0758bf2d45c4846fab41febb526e1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:35Z), 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/QZFYZ1958117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82c4d08fbd64e247346305684a1a6a44f9fedfb6fa73bb16ef45b115e278fea. 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/CAUM81900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930d63e8ca542a6d62aed4a7d44a85c5d3334c4c9f9e617d2ab76636d1839702. 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/CAUM81900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3192071d575a218ca95ba9bd28c4e8b047083b17f523a84bbb9d368a3aac1fd. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:05:07Z), 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/QZHN61988107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a04c602fa8280e7b25bbecaa6ececaba2f33f260876a192cb82b42fb9064e45. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:13:32Z), 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/QZK6N1974566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba826017c187a574c15550c1770895078bc47cfe16b0ecf231712e8c6c59cccd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2128320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ebda68331e611092c1392df1be1163ead9376690c0529fd6f52b79cff8566c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKPL2296725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5436a862aa6c7f158916cb595cf50fb7b637bfbc9ea97976ebb3ad33fd44da68. 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/GBKPL2296723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187c3988d06a76ee77e6d387f90dd0df316687925df9c9a68e0e2e1e0dd46512. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:39Z), 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/GBKPL2296728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd463975583beda41f977e8601d76545ffd965e601994a7df3fb0213721afec35. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NL8RL2312858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363faed6983b2f6e3a107dc9afdc0ca1ef9ae3683d8b3b14c9a812facf1d05b8. 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/NL8RL2321206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363faed6983b2f6e3a107dc9afdc0ca1ef9ae3683d8b3b14c9a812facf1d05b8. 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/NL8RL2321206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90967cf5b1fa7067cddf099e0bfbdf81b763dc02816599eb860513f413937cd. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/NLRD52319413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd697a1e43955c5554761c9e9edd4de333a64624d0a2521ae04effd740cb04b5c. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/NL8RL2337508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2526da7a4f3ac1f62782b5ded401ead5978d93cc868f0a72e77c6dc65c3039. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/AEA3A2565474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722efcad9fac220023d3c5f702cb3d9b46b80bb8b7e097596f5725e9f0567687. 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/AUUM71900578.
Nightlight (feat. Annika Wells) - Kaivon Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738747f9f4181e673210542617bd00cf2adf40481b61378c041cea72f30a5abc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZZOPM2003250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48e4beeb097c2aad626cfd965948a8c735afa90a4b6f7f705503a58544328c1. 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/AUUM71800573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7b90a284bc72d3c7b2e993dae39fc8392a9c5a5d2ec480cfde3c8258eb9793. 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/NLRD52302552.