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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8709b59cdf5fb4dd54a2d8cc1eb88a1d283487032039950810675bb1f180c58b. 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/65cf1c84-0b7f-465a-96cc-d82173bc4b72.json and https://artists.proofprofile.net/proofs/artist/65cf1c84-0b7f-465a-96cc-d82173bc4b72.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44b27d4fd84e0528976bcb5a100b7d316c9776ffa7fddfdc59905c34671cea2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:25Z), 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/QZES82498650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88d51713c94fd271f5ce764c75d2a5edc77f06c77bb7cda330ed11d85a2b62e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH1555943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e7a50dc75a6fcfdb90de281a405fae59b1496d5ff576678810ce60a48b4fcd. 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/USCGH1647707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703458bf9c4035897d79166475a7ad4971fd4fd1292f49416b7c2fc0a29745d4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:12:58Z), 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/USCGH1647710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8074786f92b19dc54fbedc1dac7e2c2f1b98e209552707af2eb7aec303c6160b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBSMU6323776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5dc07402fd0e2cc3b53d4eddf782992cf33327e5a7939990f6d20b82f5a7a3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU5870079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631a75d5485d782f348b40c404fa98ca5176f35918112c42b6a7bd894bbe4e0b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:34Z), 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/GBSMU5362984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a91c0c4b0c174aa2fa0ee955855d11612859c3f0c05febeb4bf7ad82dd7aa6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:58:55Z), 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/QZES82498653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc81a4863f2208849c355e9c7d02bc79fdf221664f3464e9b5eb54ba344669b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES82498660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49881bd92b9cec5ce691d9e238a9583d4d5cd5f12d9c5eb3dbc4295372d66335. 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/QZRP42376835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b20353158c85d3c3bbfcae1d426c8bb186b105d2c687c4c99e78822a59fbc3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES82495020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651e34f185e2357f96b6ae20eb960dd14103bf35f5f8d7fd73edd7ec4fbf171. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:32:05Z), 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/QZES92442597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01386190599fc030db77a3e9c52c3a4dd83e4eb5b27cac30766915e95aec2328. 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/QZFYY2451199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2e2aa13d9ee42187eee44836a481cc7c8d55f681c0c87f735aaf5d9dae912e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTAZ2571960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb768a472b2ffa4f8037c2dc294ada67daa81b2f556d2c9716bb02c54caa36ed4. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:20:58Z), 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/QT3F92584261.