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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 0x82aaf53ce33ee6a07fa5051ff1c84f26c5270a1ffab6a3b1689191d7af526bf7. 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/858ade6f-8633-4e87-9ac2-7bf6fa0eda67.json and https://artists.proofprofile.net/proofs/artist/858ade6f-8633-4e87-9ac2-7bf6fa0eda67.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 0x7b8574a503bb73f12a4408276fcba2ea6ed3f0fae4bb82329accd6c1c6a56ece. 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/DEZC62191474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4f10d801a582e20a53341ede5ebed14681d5828e749c8378f4dc1ed91367b9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62109572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fe1b4daa916c8b090c671dba3ba771f09923991895d94430580092f1b30685. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEZC62146489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200a366157a1283b204fab990e222c1768d4e5c79d6ef5d374e82bd3fdecd4a6. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEZC62276284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f51c4dcac8643387cf8bb0b5bccd7425fee6b9d97f13a979b33732f68556ba4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/SE6I32336370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f84ac29ffde0a7326303ba101a69c96351f23e4b0ccefd7661e5c857a135db5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE5752485836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7308bfc7737c1927a1f94e241fd2290d6b5200f1ed522d3756acfbf4e0c9bba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6HN2417072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842f0fadf2d2d15e3ae1da47a843905b83534d9a5e6df0488257aaa423146293. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/SE6HN2451030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f84ac29ffde0a7326303ba101a69c96351f23e4b0ccefd7661e5c857a135db5. 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/SE5752485836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7308bfc7737c1927a1f94e241fd2290d6b5200f1ed522d3756acfbf4e0c9bba. 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/SE6HN2417072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842f0fadf2d2d15e3ae1da47a843905b83534d9a5e6df0488257aaa423146293. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/SE6HN2451030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09218f181e3cd55ea2dd5b0c0db9d24ae0f8bbd9f1ef86fc5ea6ace307c8339b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6I32402649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c0ecdc5ed22c950dd9cf92b59744a31fd8607a869ad085a6a3d584976ca640. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE6XY2568210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9af71f15d6c30c6f17ae9fb78ef17469b11eb263b19d3fbae99776ae57db109. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SE6SA2508902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9806f207bdce9a25f90668548cc1a30523ffaf507927af822fef1b93d8998af. 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/SE6SA2538218.