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 0xb80d14b5b68d7c1c8af5c50ea75845821d95facfd37fa7ae489181b1abde8ce3. 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/dd3b638a-06d9-4d94-adaf-3dd9c8660f9d.json and https://artists.proofprofile.net/proofs/artist/dd3b638a-06d9-4d94-adaf-3dd9c8660f9d.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 0xe4802d2546b681d252f149c4fd7741409e6cbbe71821ce85e76a4aabb5ed0134. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USANG2471591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d91163c8729eaf68e45c38e7415b2dc5cef2e1a745a54524cbd9098bf3e92c9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:13:20Z), 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/USANG2481078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d2a9328e1132a5939f3efafbb2425b497e37d46085cfd7fedc85d770452d96. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM3DF2407879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ec1da42a8adaf308511c0de22f7af8df865e635bb607fab00e48b7dd208e6b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF2536752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a51a78a974a8b5c76aeca2380c9fbd12b42dad3ba7f54c062fa1bc1a17aa9b. 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/US3DF2536754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e6fbdc78de0ebcaa65f6f767a25d0e56569374b594f3eec5af25253efd12a6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/US3DF2536756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc9fb4ea1f0e4570c310b8fd3ca90f1535ca5e16761abba86d92f59655ee72a. 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/US3DF2536762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d79320b6fc26b406b37ab1e285fdc53c637c5c69a4470c3ca7adc38de4f8ed. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:58:38Z), 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/US3DF2536764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a49a0400993d8f9110a6a868a23784118ea04db5e5afdb900979eaa3b03146c. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/US3DF2536765.