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 0x0066e6ed566c22961be0e79a066ee4f7906cae7bd348d1ba2c596839b8a67526. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32923273-9e38-4812-947a-c6ca5d9689a0.json and https://artists.proofprofile.net/proofs/artist/32923273-9e38-4812-947a-c6ca5d9689a0.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 0x86d51ec0fdedee11460f8bcaef6e86dbf86d588a4076041fba391b95163d874a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/AUMEV2516584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8554a217f856bf0203d0abe0b58601ad9fa077733e4dfeaf8cb6ed62e55098f8. 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/AUMEV2516586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8395b6ee4bcd6c3dc038cde0f2185f0d065384c21e8231d95378502669ccd541. 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/AUMEV2516588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce25217d956619fae728c98084735fa6aa07ea543c6298fedb4968f23f46e54d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUMEV2516589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44451b27d27aa9aae35ca9e0ad9be8d9db70623de71c96c0459d246f700b0e9e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUMEV2516590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc05a0c81bf664a7036e15a053bb9a30cabc6e350b6a13f2200054d194654e18. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/AUMEV2526316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe079bed179b00ffac9dfc3a034c25166bf047ded2a78062c9880d36e60fdda1d. 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/AUMEV2526305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a13728ef19bd647d698c33ae65a79e2fd37d6b2961bb1dc6402e6e809ddc0e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/AUMEV2526300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250d8376455319b1aa1c3312e851f1f9abc0f31fd629ed14500afc10394bc744. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AUMEV2526301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfb5af745fbc875e32339ade592d2613858c542d981033518c49785d96b184f. 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/AUMEV2526309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e0c313292630b9bb1be41fcbe99e5b4658367b8b35ec8117151d812bb4e1f1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AUMEV2526298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afbb67c408bde1ecfa3cae039cdf75ff17788d001564c92e588fe8429a3affd. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/AUMEV2535082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deb91ba10c6a00ebbaf12991054e3739dd13c88e42bd39d77710bd75cc4929e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUMEV2535083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b5d46c29933547e526018e234e8be5f42a5b5adf9c6161985dfacc67010ca6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/AUMEV2535084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf5cb39c1e895b0c79a030d27404c8e0a3759250821f3b28162973b60beafd. 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/AUMEV2535085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e076e00925270cfa35a30ccb1a7f185c5fdfdc9f86d6dbdd92420a4f5ea8f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/AUMEV2535086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e25934b5fbfb6a943c6f9f630a90473924e73f171c82aa1ff1d9a1b02bed1. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/AUMEV2535088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df93e478e3e4b2f27e318e8504968fd015ab2e6c77576e1fef9bb0b61e94f1d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/AUMEV2535091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9786085d1be7a91fd184662bc2f6880d60217aea8f0c31cf243772e382654a. 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/AUMEV2535092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220de6a5773f62f2307d37511d70f3ec10da7960891278dc234f4cb60e6fa02d. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/AUMEV2535094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aeab3f3801318e441b24e6516df32f15219d989b3d96c5a44adc855a6579bd. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/AUMEV2550176.