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 0x59d4fd898df61fa034917363118df6341f779cf6e558736760970bcb1da4a3ba. 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/59ad7ba6-06eb-4faa-bb57-16eeef59d5f8.json and https://artists.proofprofile.net/proofs/artist/59ad7ba6-06eb-4faa-bb57-16eeef59d5f8.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 0x4ccea1e3c3b73da6917d712bd89da77100a62bf399d92aa7b471a35f755a7f7d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLAX61287897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011cbd0903e8413bee1726f32cbac6a8a3b9f2cd56b59935ff67478028480f1b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/NLAX61288054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f198971ccdd008f0ad423d25658654c69ec04991329104b53942d749812e0e. 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/NLAX61390282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a65a12866c9f74fc9b0a000ef575f062c2010bb7a5af867cd985ae44c9aa15. 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/NLAX61390673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a493d621999bc01cfe5ee853d80fdbf18f5c7e4c605a69484f2981fe4b3d0f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLAX61390799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c84ecab02051af78873b184303b86c3fda01aaa5978c7d7ae16ea9d82539b6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLAX61390910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbba87170869b0bef2db04b174cf6efc7481d2fbb80fd39853e4e700f34655d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:33Z), 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/NLAX61391170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722e9fc5e64f4967addd80bdf0d7cf872d9fb8311c7e8854ec01f3802633f08. 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/NLAX61392065.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8531e03b37c97491b97799b7cc46bd451deaedb2f6c0b48c70244877249c2c87. 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/NLAX61595993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aadcfd3b667c2c32232d8c60649574991e15924e173e7e8355215145c137add. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLHR51840722.