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 0x6c3df77d7cb14cd17e90eaee989b65ecebb7cded0a2322a25dc92589abcd75d1. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d72aa928-6e15-4f97-bf8c-93d616c57da3.json and https://artists.proofprofile.net/proofs/artist/d72aa928-6e15-4f97-bf8c-93d616c57da3.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 0xbc2f7d0dc21274526348f96712806462949bddd01ff24532fe38b657978623c3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM22066428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64a810a754db2116569251906dc42df95a78c7e52380f09b884b550be1d531d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:31:58Z), 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/USL4Q2036436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fea4716f2e5393d986123c739db6c707d3675c52010bda9a4284bd37a8262e. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:00:18Z), 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/USDY42546909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c80bf2ab8bc7f2a6835ac967fba2be8fa77136bb2c7dfa9a71fcdada778075. 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/USDY42546910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89537cfb934098231d918484d385ee429e83f00506229f357fc4e00ba38fac2. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USDY42546911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15d66b32e2d623f84a033152153b6163b9e5ef0dbd739d764ddacddc5be8580. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USDY42546912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdebd71f28c252c12dfc8edf02951fa8a577a8f46fe46829642621742ec30510. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USDY42546915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd884f6d6e58a17656c5d8fdf5da09ee541413cd0b035a35c3e10f2dc24613c0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:01:03Z), 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/USDY42546917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e53bc5de3c57375e937df776ee8a1ad4d4adef6698ed4c8e1f0269070b230c1. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/USDY42546918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c106cf4b0c5e5cc7f3afc3e59c10a7510a39718f8a92b647d4d724fcc3cf58. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USDY42546919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8e61b9c784677375214e01b9e5e3345ec4fba9e02b9e2eeb2fba3aeec2a754. 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/USDY42546920.