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 0x18e305278897016832c6fa0087b4d8f307d2761853869273f983b87e881ae79d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5b6a518-e093-4dd2-9c5c-076a76a8ccc7.json and https://artists.proofprofile.net/proofs/artist/d5b6a518-e093-4dd2-9c5c-076a76a8ccc7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wild and Wonderful Denmark – Expanded Edition
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 0xb2c64ca65c713da3ad33a976ebee30393b3683c0127216bd06b82ffd9b22c388. 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/DEU901503028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c953d805e84afa2930df6208311a4734531ab6fb3df1e55ac474e3d798db37. 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/DEU901503037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc058e6fcf50fb0b28e549647d7390857755abc9464cea71428f005492e1b305d. 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/DEU901503041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cee75900efa0ef358daba6a0e56bf723b82f813fb1f86f5b47db38d4dbb94e. 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/DEU901503043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5577646a0a153d1872931708a1a15ac1a9c32e000bc9c1bb18907b49192c31fb. 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/DEU901503049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe043d2a099a22898dd52a9fcd97d5b33e97f435836c3b3860e804a98c762a828. 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/DEU901503051.
Zwicki: Underwater Dance of the Porpoise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dddc78d972bbd632f6b83b7080b0677b0b811fd97ed9bbb57f80df182f9f2c. 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/DEU901503054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c467c8da43197c9a02b735cd36ad05c3a488723a2444c02548cffc8f19dbff5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEU901503038.
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 0x4e880ad2ea61b60321519a68aa71110f54863d7265777979d633ebbcc8cd6ca0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEU901503042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1473839498fdf58c48cd06af15209446222932fe3e7a965d02d556c4ed7e30. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEU901503044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b557b74ad1e1ad049d1d6ba90bfcee657f831079bb25e1315eee6c399c88db. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEU901503045.
Zwicki: Stag Beetles Mating and Fighting
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b89fbaf57b3e9d4927fc1b50d0f4d1d2fb64a960e57931499a9ad643aa3a5f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEU901503047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0b249dc5a89f07a22cb88bbc3153a98f6dc5dd1d9a6eed1d6e0798e332fd03. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEU901503048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84946668c7f18e1e251831c74f5d4aa6f96a1b63e4715d8ca80d92af1fd155. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEU901503050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3936d25787e8a95eb5f87d45f823b603f6df1c46aa60453660f7eab77d2e08a1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEU901503052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13612a28baffbf8915b2b4f2550f835aa747fbd39c2e8b69d6c05b0ece22d68. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEU901503053.