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 0xfa9c639d85574dbfde3ba5ecc4ab626fd445e0cb1fd8f55c569a8ae0d9bc6789. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a424c25-bcc4-4e1f-bf71-09bdbe4e9a04.json and https://artists.proofprofile.net/proofs/artist/0a424c25-bcc4-4e1f-bf71-09bdbe4e9a04.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 0x7d01ceb58f3d9811d1d80c6b2be3b577fae85d9c607f481fb8791d2cc8e3681f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7K2596734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828a33f698e112a02c97e8edc245423f226bfc17a35fa6d5705fbc9d59aba6cb. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:53:02Z), 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/QZZ7K2596735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394367646b3e5d5807fd34cb4ed06e129c8d85dd5742d54d9cd14d7d7d4da44f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7K2596736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697524bdf68d2ca5f9a5e0976faeef6aae12d6b30e66b7653ebd34561280ac49. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7K2596737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b742a33acdfdcafd9a5de6b3cda3ab1e77d39e4067c286f03b4e65b92809ae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7K2596738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b28f2e132f2cc9b42590aa426ddb68c8eeb8de0f8ad96d96196bc2cafb7f12c. 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/QZZ7R2580995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d59a23d0f985384a61de43d2029bc04bc8a914cab818d6b8152d9a621de631. 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/QZZ7R2578140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f1f5f6c9a8b5101e3013b7d811281790bcc304b2f9d5b406bc63f852df6ab2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7R2578144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5822155d08099a3051999f10493232339b4fad399487fbe905c4d3b79e2ed228. 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/QZZ7R2581046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253a4bc78238013479d7fa036174876872421cc2293b5e60c711b2a9543e26e9. 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/QT3F92590552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc36944ae9180a8c964d3142581565f4f8ea05cd23b8937875489b9efc85b247. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3F92590553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796e36690ed10083dd1f4b28437ff189258a0e1f88f22e9612c814c3a900b750. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F92590554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e41a5dfb2c1cd89f2b1a3039f4eeabfc59042855c4351b6a2966ab298002c67. 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/QT3F92590555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdb7923917fac3079a350494cdcf1cf7a58cbf477df398430b760859a2bb891. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:17:20Z), 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/QT3F92590556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158428b8f4c2da2d1de737f81eb444cf80dfddd8e46bdac7151ba5186bce4fee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F92590557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8d7e65b640f0fc133ba88d90535eeba38766c4806cc50a60a8a199dd099136. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3F92594598.