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 0x34b5cb2f5e64c87384276d114dfdfd356d9c736e422d0035ace3014fef2bbf63. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89d1dec9-8554-4df4-8af8-9f57c1571eeb.json and https://artists.proofprofile.net/proofs/artist/89d1dec9-8554-4df4-8af8-9f57c1571eeb.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 0xa183ef156b95dd3e5e676410817ac49a39a79895a175ff653e8b8582182ff13e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:37Z), 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/USUM71809134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861a74fb3ccd35f5bbb914cbd48b0dbfa7d19aa2a98122b2a09afc2ce90ef588. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USUM71810321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee077462c91d686ed3486718f6740a34abab85f262a243054250ecf0870d4b72. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USUM71810322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a557b19898e9f5ff2dc8919fe111e1cff7de4d275b0a13199d13ffbb8edbf6d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USUM71820178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8055dca757a845b6b2fd39c2000799bf46e3ac639b716a3eeca73c8ab4c4c103. 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/QZJRB1994727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171843c02f8bab06d87bc5a0c69d367bdb732cfc4a67eb9638a1b2967d0d4f38. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:48Z), 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/QZJRB1994758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a7926512c726d6051508e8334007c5d95ef68fbbff643e8a283d2fe4df8edb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHPJ2250508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb307777959265db5f57ca971bf2f91493f62a15dfe2e683bcc3ab61265ca7fc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFP52242683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17602941de413931a42b249e67c28ecfa7f227662aaf606fc6181bba6227f613. 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/QZS632182797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3699d9902c03b6229973e2b71f8cc858a50f1e06703f8721cc903347b0aa4e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM8DG2363596.
real now (feat. Dominik, HOPE & K. Roosevelt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b35959db0134aa20f7d9720043d3b1376c894eb08f3b9d60329093eae10ff7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUG12100905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd61b0083e3b967c7b73729d72051b2777e8962efd39e8060da60734140a3ec. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USUM71406255.
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 0x109bca3e6cd05993a72d2fd00816279c5bd9c210197e28c597812da6645a7264. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USUM71406266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae9f3e896bb4ecf55c3beb687b5c5988f1f09076197b35c6944f36542187565. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USUM71406276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff99e597c44efefd5bb78f51eed30735609387a49d2d887d4451d8eb7c1b69be. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USUM71406280.