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 0x6f4c6cd66b47acd24d84c4b64d460f94cad120ce365cba6426f67f76f2c62747. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2334b5a2-1397-41a9-9efd-0ac767838d03.json and https://artists.proofprofile.net/proofs/artist/2334b5a2-1397-41a9-9efd-0ac767838d03.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 0x7c1894bba56318784db975765b02b25a817094ad3967628ae75c6470f6b4729f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/BEW161213701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bdadcf9b428164debc5c9fc5ef1f28ff0cbf971714c740a836f2e149c6e0b6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BEW161213707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc284555f7304fa9b08dca70a1b207cc381a42d6ced58edfa90f5f6c84c401c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BEH551400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e9068c12b2ad0769d758b03d920e6147447dd0c238c3bd6d366141429d7a51. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBZ521918202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6a74d722828018f47d9b7e01bb04d8e2a85098afd5226d25fd29ecce95bb45. 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/GBZ521918204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463a17be2dcbd7bf6b91d0319b516b8dfea0b8eb3d270274971a9b50c57badfd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBZ521918206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65ea5ee1835a28d49faf57e462f884799eef3f61153bee0696f6ddc4664b16d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:54Z), 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/GBZ521918207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886829f9b8fa0461b1d4b74cd37d32a695b087e184efbfaf590ca513da7645c0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBZ521918208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f32b990aedc743ca63df2ae53981958ec4d03836a9b41ca1ba98fa24c56ca0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBZ521918209.