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 0x9f04362c7d734ba051dabfe1b7d3858fb1a1fddf0f691e15601bf8a335b3dcac. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a946483e-8fcb-406a-8a4f-162b62ccb5ef.json and https://artists.proofprofile.net/proofs/artist/a946483e-8fcb-406a-8a4f-162b62ccb5ef.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 0x74b85a1822dc367591a5723403f05be2c1a807bb14d6b757788c99d7c0d293d0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPQ942100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b85a1822dc367591a5723403f05be2c1a807bb14d6b757788c99d7c0d293d0. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/JPQ942100056.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd462ee9fd81e971c940c118ef12e935b692d2cc9cff28be992f990f808ba4f. 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/JPQ941500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcb1eb81dddc6afa75dd3fd877e29e5790a1d994e9e84e881e6d4b48d69fc14. 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/JPQ941500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1a17f2cf60e7f67463e3f50848a35b1d877dfd42ab4b8c4455cb87c6d3ec7e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPQ941500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3deb53637903748c31a4d73f584d6b6ba34c8693039ac0418272d66aad116e8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPQ941500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab814e8b6207ae381adda157893d0cd9503f1967d5356f1063bd8f7698b70f9. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/JPQ941500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfad58031d406355efe5896c531ac66135e0472740c8d0cc246edebb8ae7e040. 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/JPQ941500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4106160e6312c0e034a02e54a7a99d4be764a828f1026c230d9c1926cb9bc2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPQ941500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43588986bbb82cdb8b90af9560e1de83fd7b3a5613e7767983203ca6e8f5194. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPQ941500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92321ad18fdd9debd0bb980f04a72de59131d6285650e60a65cd91022eb27ff5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPQ941500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4954db2d9c562a4664811ad1c0baf82a2e918b89c938a5c3039a70afc12d5256. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/JPQ941500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f71ac21035fe7e1c4d7b442f98e9d1c1fa8bb765f4b537f71e890ca48eb9de. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/JPQ941500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786dedeaf8f667904b20bcad335dcfb175a6d29e6b62265b35ab0e5114f60ac3. 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/JPQ941500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b34cd9d62b73c7aca0e421893a6746626657e80b6cf4c613e908c8c9e22700. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/JPQ941500074.