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 0x14fa6f3d572ee4ba428a6806f9b324e60f219c966b4809b1a2129e8d26458386. 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/3b784ae8-c525-4194-8784-7d550b2ca21c.json and https://artists.proofprofile.net/proofs/artist/3b784ae8-c525-4194-8784-7d550b2ca21c.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 0x11bf313eccc0e4770e75c1fc3b69cf0b4d2395c04d7fde765bf9d062d80bd55f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FR6V80174115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd38f15fed58f9cdd2fe5b364ab9663f8d1e71fc35e4e10b811907351ee27ed. 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/FRX282026383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a710be6cb7f0ecd590b0188ca53f5eea3a6d56c2f74dbd47c86413695a909c. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/FRX282026384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03933579a2365991cd3576474191448ca462a116ddc015a124477a6e7e567bf0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFU2117879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203254dffa4bbac8be89204cbee0003b2cff500c862fd9f5611e714dd8c934b6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGB2232267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe747673ca63747eedbec9cebec80d2d7306aea4fd7e92f1cf6493f7eced1a9a5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRENP2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6408f86f1f779f1f8ee9c7745f34d7a713856e6e6cf82d08c02127f698c202da. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAIP2432728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4067c449532b70b6edecea8bfa8421028196d95b35bec8aee84b6e13ff1efa5. 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/FRENP2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf408cd801cd6618be180791a785fd7bd8c218533f55abd9f0a9dddc7696ab831. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRENP2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f3fb8fa10b8dc61f986f7dc69edfe76049e017b41e1c0533f027584be6ebd3. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FRENP2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490ad840aa65813832ebb161e177ba3bf075860e267c3064ee5a3da2fe764b55. 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/FRENP2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c00d753f6c778a6ae3abf57c9d6a00438bbce847bb8df8caa6b90e50594d86. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRENP2400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f32d26c0cd61e9cc04a52182967afbb823c340e3c93c4fb3145308ca2304598. 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/FRENP2400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01239bcdcf162cf9f851c5922f9e6a172bd5d2d840b7bf550fce1b68fb88c9. 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/FRENP2400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b03477a4e98d59311565b096492c28b9ad8498135cc75ddb5197b3eba1a066d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRENP2400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c502af580bb068770b2c09097772e4a754cb843bd23474a431c29c5024ed19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRENP2400320.