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 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 0x56438ce20d62d18557c1ecada28b5aaa90f095a4d791ca953d728f4ec2b8f7df. 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/71261975-dc72-4dad-9d08-1d5ba42d3435.json and https://artists.proofprofile.net/proofs/artist/71261975-dc72-4dad-9d08-1d5ba42d3435.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 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 0xeea75edbb77eacd552fbd91b7ecdcc1306c8a53fc435afc5ab72ad48c0db12a9. 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/BRMKP0400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23214d8a2045a2d8b38b64bf91e6ed8bb15d3727728e87a85d3666a78ab49979. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/BRMKP0400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05dcde0b48ad793b2e3258e2e1e5cd135d6773367ada3040b5136b393548455. 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/BRMKP0400854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fd542c61dd6e9fa8661a9a5094b628cdde58292ae76c14813b0a95b07a3909. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BRMKP0400855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8ff03636b3e86078dcdd63dcc4ff1c9ef6fdbf0c3c13037e44043f8d160862. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/BRMKP0400858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe667f6e158a5ece2301e80f37663f3fa32363fe3ba3321a2551320e8760e0052. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BRMKP0400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439469399feea238eb1d124b8e56beeb5f724b5dd6a702923efa2e84ab043ad6. 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/BRMKP0400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28689a1dc921989a9bd59e23799d57f0ceea5911ac26f12d9a015e5ce21c5d. 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/BRMKP0400841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156605d7477184e465bd43d20d4ee61ab6bcbcc9642abebe0f63913400e7fa27. 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/BRMKP0400842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a2c15151c4bc20c351f3e8e5247f1049662f73cc3ac52832b5d64004e35947. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRMKP0400843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cfe3878218dd6911ddd3e36e98b4dca639e59e115dd15ef547900b06a9a14e. 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/BRMKP0400844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a97eac28ca0de7ca29854448e16bd41016fd306a4fa4143eef22fc451edb96. 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/BRMKP0301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d17bbedaf34c1aad5cdfc04c28d95185c7c762b8913e182e9a8b809332b480b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRRPG0401521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d560dbedca080a038f3c36e6469a080f7936355c3deb76faa6941666b57c6de. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/BRRPG0401520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ba93e4dca8425bb42494c4dcac44b461057d277b93b7ca3a12262c19333949. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BRRPG0401519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf4f8e824ee40870746caa853bbd1275daeb9d9b43bf89592acc02a390168d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRMKP0300052.