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 0xccb6b73d7e49681c9644663dfac7d9b37d63b2eef1725e9b757da08abf834a57. 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/c069a2bf-64ea-416a-942b-f649a73ba1df.json and https://artists.proofprofile.net/proofs/artist/c069a2bf-64ea-416a-942b-f649a73ba1df.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 0x0b81c27b8b51ae7e05171b0f914cc0531e9446f4d974d5509ef789aa9f379be2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda937a203e2d28383e4bd6c40c8a1cb4b90635d8d9fd68aef8f7ce7a212596e2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081342802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9e22a0b079fc8bb8caac135b9fc6ac1ad86510562ba435e711a3d740fa7f9d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081342805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8289a49c3438c1c8639f8295d0e1697c6122e839a952cd1c475cf8b2bfc768. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081342807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6e0ba3cda21c9797dd7b6acb6719abee00a24d88dd349967e4c27fdb446b7f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES6081342808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8556c408f214acecd5da40b5d6ec71670fa1df47486306aa491359be5b88c11b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081342818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d0f158f70e8c07fd2ffab7dcf75ec39c728c4241b039cd32d354095ae017f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES16E2200417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b24956ee848dd6354a891ec17b264a04b7ca318169377d5e9c71f7b7e1353d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM81710604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d54895fcfd80feba486548c8402ed77442cee0598eaaef78b6467b2b35009cb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6081641601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a78ade3e215c8dd95ec2e558f4b99572ac678e6afd8d2872be59323688b69da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081641604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0153e1692eb7ef775a16ddd87b838da7d9fdd1963f4cce276e6c1dfdf334de0e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081641605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6c40ca17bd244a1235645b77195db11724845c0fa4ab69cebd84d73a35c3ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081641606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092c068eec4263326c83c3469bd7211377c2f9d2a90a706acf4d95bff48bccf4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081641607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6b436ba753f8537f8e2960bf7382d66f34a094afc02c4406519629f00f9529. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR26V1602630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917b5174ed33a80003e4fb11d46e8b879c92f2c1b57b2d61515aa1667edee3f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR26V1602636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62d4525cbfa4b2672d7548558a908992d7c771f2910dfde8e5eaf3dc795d2dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR26V1602637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c40285fe7912612034013220308486525c38a2830149b6b79f0da819150682. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES6081244304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec064fc1363f284100b3f4a4e84ac79393ca4fbf92e729fa33eecb39eb0d74fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES6081141202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58bf952db6c4bab920f1895d809c2a03de8d92e2dccdb133812caaa50495972. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES6080983311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0619fd3805ebc7702a6d546413a0649b0e354a8e418d1cfe74465797b9259484. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2128629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1329cfa1fddf80114e0843a4cb45ddbf538e502e26533a1cedef6036868ae154. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2508230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7871cad296f96691fd72dfa7ee1c127cb50d2f5aff9757bca1a1836c12ec4c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71D2300426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd31f36ec7b7c349b2d3c751d5f20eed1dee7d44146d83099980a64840425b77. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2154973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46f0733f7531d6dbdf6fa7e62dfa9e16307e01e6b8ef31f6b891f0749bc8bdd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLRD52018947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baedaba948084a9543442161eae9e3aa330881b057888eb677ec912e9759434. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AEA0Q1913814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b64f47af841970b82e857f69b26f5346383e5285d3a8ed8c65972869985d1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081941302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f1a746656b2a188543cb448df5b43ea6cf38fdd9641d3d444b1241e27c3629. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADI1790077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa697fe65ac0f96d2fefe187846f6e634ed1a3eb93117f5390848b13ab8aca3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081641101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa359ebce9dc14b2e5879ecba4c93803fdea1b7bd0d22edb2f4110f1ecefb1f3f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES6081441604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63206f11c949d4043468e2796b5bff0b13b6f0e2f4e148b3fec988cc485ef87f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081040917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b33fb9ee1890b51b59aa9fb88498338f242bda28df9aa0be0863cae292e0f5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081040922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a3e4c3472ddb6a48c60f9fce7c60e34a44bfcba53eea7c38a3055de238d84e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6081142710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b5db27ca9932125fcf693953face97702b51a323a77df5b90c7ad83420ba29. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES6081142716.