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 0xd93d3f5c275bfe606e12ead716fe568deccf4f993581056955e4a7a9d8292e61. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c844bda1-b14c-4f8c-b92a-d50bb8f2a0bd.json and https://artists.proofprofile.net/proofs/artist/c844bda1-b14c-4f8c-b92a-d50bb8f2a0bd.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 0x9df3c6d286e8a1a6fc7a14d9061a386a00c2ada5d27c4110e9d24dc3c12943f9. 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/NL5MF2100650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21b279200656551b2f6d2aaa525d67059cb132a9928337cd96d03d5af2d2689. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL5MF2100888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35703cf2573bdfea6835d4b231eb5cf1353e14e3156d3fd21a53f09bcee22c0e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:51:44Z), 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/NL5MF2101141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529a83aa970b2c4389028e7b73534cbbcad658bcc8399526a18f7718f5a6eb1d. 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/NL5MF2101289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035eeeb28c619208ba8fa5f1edd7d6c520c9e693fbe5c19f35fc37fe3eb6bbd1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NL5MF2101394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf733c3caeab76d50283093c8d273363f728e7e645d219a4649a83192b93bf7db. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:55:11Z), 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/NL5MF2101623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c4722d9d0cc99e01159a2fd6497e42c1cab6158bf48782b73ce60bbdbe8dd9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL5MF2102441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0708940742638f3ad144a9ce929c716676298c8402f562b261c5a331a0b56fe. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NL5MF2102442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c961db737ecea719e543d13629de240ebada1fedad1ed81332fe67da7deb6c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:03:07Z), 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/NL5MF2102443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b00b7e67a0b7a11367cca681a42dbb8fcf00b114d65c3b3b597302b9dc8ee0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL5MF2102624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98990bd109d958e33a778198ba1dbdc1ff6a5f0125baf8b98f67cef91b15f9a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL3GQ2100561.