thumb|upright=0.9|A man in Jewish hat says "Amen" to in the margin of f. 86v. Abraham, c. 1300. Amen is an Abrahamic declaration of affirmation which is first found in the Hebrew Bible, and subseque
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 0xcec1eeee93b3c683c826d4fdeb168cba758757c791acf011fd9a5899c3cd1e17. 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/8c425483-cb9f-42ab-916d-7bfeb148392b.json and https://artists.proofprofile.net/proofs/artist/8c425483-cb9f-42ab-916d-7bfeb148392b.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 0x847ba25b86babf83d5e9487e4e4b06c8e25cd8a0ac09e8d16fb7e8bd99d09104. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AZXLD2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd585e78e4dd588376208dff1a3b34014e25d71a75393b67063220167532f86. 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/US83Z2205163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13204ede4834e976695375d37373db22abf180d93c0fb8b9b954c3839f45797c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US83Z2216719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a7d0eb174d93e910e5d6238ff9840804a01133f281184e67e8d7cacbe587e. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/US83Z2228812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee1f89a5d730cc34ba9f4f544d7f91a206c27666d0fd28351492092033bf3a6. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/US83Z2300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51144e8bc577d93615da91bb853d1e87ab741d0ddde71b2de62ead4c7a9bef80. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US83Z2328037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82986f951147e390608770cf450f9d4eb9e8293ab6a470f382b25bca898a6914. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US83Z2329699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f33678389079ab56c561b4460abe9fd271ee3c982c28b7ec09dfc488e1e026a. 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/US83Z2340000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bfc800628cf77d7419347d3e307a3b19748aaa6e3df490f970896148a3f1ac. 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/US83Z2350173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1eb696889e0c3b6cbe5022e0500aeaad5cfb7783d8a571beb3c524ee1df688. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/US83Z2463918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8da63686a02f8044b324f592e19631fa84361c1ef4e7ab8199b94b958ef07c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/US83Z2488476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c50393aefb9a9c2738049bc265476928df3603713db5c43ebda56ac9df0899a. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/US83Z2495872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ed57c12d42da858241c60fd481155e03fbe5de38282fd8e7550a0001dbe30b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US83Z2499017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d4a40d577b37e03300d601f74c6815de00810974a18f4d2597cfb558522da3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US83Z2499105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc256a9ba8f716657480f6d9f4c75458a478945799c0956c0a6a5bff477482e23. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/US83Z2419455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffa322a0d376e95f7228d83a9d219bcc0d6b1b0b98557d4d227378bc3b4ba78. 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/TRCMG2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9c3a6ebcf3ee2500da5f5c5f4211c68e2d01020b16a350e11059f522eea77b. 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/US83Z2529459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85de17d000265adf231d5683af9e6a526af458dd9689ebcaf7adf2803839789. 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/US83Z2208412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f04d363ed2d018b0b4536f0278f64cc05882174048f2975904a04c983211c38. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US83Z2563521.