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 0xbab84730fc55de5507531551a763b9c01eeb77c2f6b386833b2e2d54d4effc65. 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/5a7a098c-37f8-4fb8-8d28-60b38084d97a.json and https://artists.proofprofile.net/proofs/artist/5a7a098c-37f8-4fb8-8d28-60b38084d97a.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 0x976be4684765749519b84b264405ebecf6e6189d6c5b15a53b31bf582e0e4329. 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/USA5R0355104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20088370f69872e86fc09a8fdaff6ee2e29f50a0fff441013a3a0f912c6c2a3b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA5R0355112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d99070fde10707ebac13edb43beac94752beee6c1e835575198b6fc342dc0da. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/USA5R0355905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f931d8d89f216abc336532ab1405b57066a9acb25eca2dc45e85ee4c894814. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USA5R0506708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc589098d60b66f29695d27371fe36b0b8fe75d0603125f6d9e6cc1d770807f51. 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/USA5R0814702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dabec759f0401639d378ea92ec345e0cc0ec53a4f4505f60d9dff1dfc487f5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:05Z), 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/USA5R0814712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324e0d570f3d7deb157ae705f134e00c140f7f234cb30e1f2a63fe85738e60a8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USA5R0812104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1d10381489c6ed97b50597c13abe26d36d01a372bba2cfd02bbfd7048cf753. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA5R0812105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1003bd072827d799d2da9466d21e0c9843988f9d4a62e008ed2a3d22b1cc9c2. 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/USA5R0812106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea421e8c4ea8175abab5b59d9685ba19ce151ec390ff6aa77a1882f5e408e75f. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USA5R0812107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e155ef1f92780a4a13c7bc581055505aab9a9c05e065b8711c66bfaa87e5cb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA5R0812110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d79d5bdaafd881f1af909b7529fa3c0b61b011058f0a103a71474e0b8ee8d28. 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/USA5R0816519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaecc7e1a1a403173bd1673b57ca9ed5655e9afb79e6b6a426ca0c3bbe5a97c. 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/USA5R0834408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b36c88a4ed2702b553f47acc1b7239689eed42c98251b4d5577eb6c82f57dfc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:07:59Z), 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/USA5R0832903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faee3e754407c3e9c279413ca16bca0135109961572734c55d5d50caf8fd214. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:38:27Z), 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/USA5R0922002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf07fb7c1fbeda8f29eb29c31faa5bb7c7454f0fd1e93f926b0667b86d9b9a7. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:17Z), 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/USA5R1134311.