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 0x8e41b03af5f0ee7e1e9e126ab91d0e8afabe178ec0239a38042a9053d7aa7036. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/700c7396-eb81-4d44-8397-10d6975693fa.json and https://artists.proofprofile.net/proofs/artist/700c7396-eb81-4d44-8397-10d6975693fa.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 0x2efc487aec2f9d2cda3aed6c435960a1393be907f860b479cdb73a9417a4496d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:29Z), 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/TCJPV2383018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13546df740ca05f8aefb7cd9bcb7b6abf89225ebc9a7165db91bec44c1e7c3a8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCJPV2383029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd7e43d16ba1924b7e6414af2596d32f5270efd3cf92474eff9eef4b3e9dfe6. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCJPV2383055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efc487aec2f9d2cda3aed6c435960a1393be907f860b479cdb73a9417a4496d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPV2383018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13546df740ca05f8aefb7cd9bcb7b6abf89225ebc9a7165db91bec44c1e7c3a8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPV2383029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb5d9ffc5e237600b68db853dacc2cef566be82c3222fef57513e26ff4c4e3. 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/TCJPV2383039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd7e43d16ba1924b7e6414af2596d32f5270efd3cf92474eff9eef4b3e9dfe6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPV2383055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec7ea3ac807fb91ca613dd5261fd0ca56ac6c94dd399e97cd398aa38d2a41af. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCJPV2383075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b678addf11832eaa7c7579a88a177822537c62e30e51c95e47b9effb69c594c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCJPB2458449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b678addf11832eaa7c7579a88a177822537c62e30e51c95e47b9effb69c594c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPB2458449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe4fa9cf961ace03e3e983287e6ed2f30ca16fdafdee0111849ca7629b75f38. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCJPB2458451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b28f6bd1c735854182f99e5d79a493e001ebaf454967525ac358be551353f8. 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/TCJPB2458452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf800db076ec0af9a2cf8918605f5bcf29089695983a01077dc0c218b7666fc2e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPB2458454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcd16c8859f4520b97e6fdc6a96fa56258e666719b487b426e824ae50b5ec11. 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/TCJPB2458455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32802e390c30831e3f2d86bf7ff7d1d645372522f9d891dede42c24ef283fdec. 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/TCJPB2458458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233e115d96334d735145def914922f149da668efa36454526b9d2fdad849aa6a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:57Z), 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/TCJPB2458461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80307499e9cfa7eee88a14e5f9991d806927e5ca1ab54e1fe9f9e18ce7a81c2c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPB2458462.