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 0x6cc116f33360b0abe4c1715f2d7141c85be869c00fc9b6e137b0ccbb3d5ad362. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/251ec629-be63-480d-a435-e014800d1b73.json and https://artists.proofprofile.net/proofs/artist/251ec629-be63-480d-a435-e014800d1b73.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 0x07cf9b4503d791865f69f987d8f0115cacde8694a2aed8dc6b1b5bd717360d1c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6P42373702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076f62829ea37ee55d97691734d6c011ca59106e4c9bb74ce474db479673e5c5. 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/QM6N22371042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e8de2c84edb10a6fbeed64f02e5dfebf2e3dec6fd42d94ce7e69f8e3d9b740. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6P42373704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c79fa4b767fa6430f746b67f945a5bb15cf0f6723fe6724c76c26f49231c16. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42373706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f5237fac83cddbea61b73c15e91b58f8397cf7221a485a15f0c96b398c2faf. 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/QM6P42373709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb21323f14ae7e4beda37fe293873f06ce4a5ac8a49f88a9a062a498b62e3892. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42373711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd9216fb04e39516248506134890825031d4291515cb08e9e2ff4f33726644a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM6P42373713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e2e0c8375175879dca4a0b72022323f91f17d9b578949b80fe0863c56f0181. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES6612100724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf12d1e8d4190d8bd61836f9ac2203ff01a3d458fe963c3ea2a05accb4c543af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6612100726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f4791c8b4c1253825e5b297203a9009f1ee094a97a417b1c66bb72d08cc8ba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES6612100730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c434eb7293ac8d330035968ab3236199ce8e75ae914e3ddb3d22446f4edd7e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES6612100733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b092f562b739572c9af6def74e15ab285ffc5ef14efd5ad723689919eaed313. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES66S1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb77913bd983f59b6b0fdf1df39c9cc143ab4df62354658a3d7528707e70aab5. 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/ES66S1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6db7c2a2209d8d52aad73c8d6ce24dc692de35499fdea3bdbca9c8dd96876c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES66S1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e454a4e53c0bfc87237ed7b72ef822007e9c6682f747b16271cbc729c848714. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES66S1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65ebf6608f410a5c3a1c02203bf3fa9a072838270c8676212c5b1b88197c8d3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES66S1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd9216fb04e39516248506134890825031d4291515cb08e9e2ff4f33726644a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42373713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf12d1e8d4190d8bd61836f9ac2203ff01a3d458fe963c3ea2a05accb4c543af. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES6612100726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e2e0c8375175879dca4a0b72022323f91f17d9b578949b80fe0863c56f0181. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES6612100724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91a930470ec2fdd4225afad3315792efa17132bf17c897b68e4faa6eef50d9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES6612000711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7669c803a590240157a3dfcf9f9d20bf9321905a9473366af1f22e5c99105d31. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TW2088675.