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 0x97019c1a073aab76377c34c6897d118226204052c6d429dc82b148480c66545d. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adeabf06-f4d1-415f-9320-5780754191d3.json and https://artists.proofprofile.net/proofs/artist/adeabf06-f4d1-415f-9320-5780754191d3.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 0x221a50a30b7c6fba7e64eda62a428e1ce966bced80ba4627deacb069b4d1a23a. Chain 2 (Bitcoin): anchored in block 956970 (2026-07-21T23:34:39Z), 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/GBMA22099357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51468178ad6b404ff087470b052c424ca77e8c6f6fa591263164e756f3353f1. 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/UYMI32000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de74704409bb4376db4da1186a91378af129b6c675b71f96a1253b7b4884a20. 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/UYMI32000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de5fe97595889a92f6fa4e57a7ce03d7cb5cc9d744a2a4e193cc1d6811a3e35. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:17Z), 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/UYMI32000006.
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 0x050ffb96b1e568cbe9d2da57192db6e6a7a81a6f072e9e926a70c85603df2e5c. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/GBMA22097513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9372a05735b972e92b15ed972c1331a9c087e88252cc15814e4bbd4d148adc. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/UYMI32000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6741f163bf427b171f6ef442c0a2a13e9ef020ed0f248b875c273630526ee15. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/UYMI32000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fed242ede88db2425b9286e8ebc3030a18545101eb0187ee0a534f417884c3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UYMI32000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf376334fb685acc7337df10aeb3b3c18593137c4d89ecf0baa319de1a540ef. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UYB262500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6d6f124793b9f57a059ce68ac6ed6381074d2cdb52fdd029cd62ed698bafc1. 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/UYB262500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2a82691714334bc2efc4ea935ae3ba04b7c31e40e4b552b5a6d4f43a949e57. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:46:27Z), 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/UYB262500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ad68f54943c93aa52021a8823dde8a49e47be670648944e2c3d8868c5830e7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:32:35Z), 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/UYB262400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d070f36282a3b06515a57fc14117799bdf38a9cfee2b66ff0e9dd67fae57fa1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UYB262500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8032f9e7dc1678a94daa82c962267c26301b768540df8dbad60601d41bea38d3. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:36Z), 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/UYB262400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fa0a64aff37a5042bbd35f46d85f3021cffa63e852269bc8ee4a599fc04d91. 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/UYB262500007.