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 0x9534697fd87ae1f619d0fce7bc7991ba5b14b453d0265a5a6fb2fd4a867f1c0a. 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/5593875b-b4c5-4cb8-85c3-e43be88639c2.json and https://artists.proofprofile.net/proofs/artist/5593875b-b4c5-4cb8-85c3-e43be88639c2.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 0xf019ff5404101bf09032ec3d85172758297b15a2a7f303776b948d19b6ba32e9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/KRA381952176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e5ce85b5c4b0897ae2a0d7c04c38fd0e135f2b00648d8e4cb78abe8bef703d. 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/KRA381952178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c6513a22dc7ba6a1d43a267b86a77d570b00dc726b87be2642fb2037a17931. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/KRA381952180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa2fa3ab5a8a76cc02ae611ee5a839eb16f7c685796254c5c5f2e715d8be12a. 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/KRA381952182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9d011faffa46a176b500b0727e7112d7ba795e40f64768876ee8cc8a81b89b. 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/KRA381952186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c76d309246b59c40bf2245cc81adb08588bca35b40e4fadf142556b105c976. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/KRA381952188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5adaab74e650be714e0be2a19428436e8cd990f1b9bb4cb9c82456b0118e072. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/KRA381952189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f62b2c3f466293a26c072380dddc7b92a29e0c09f8ba2ded817aca93661fed. 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/KRA381952197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05ab7adaa1e5c5444a04bcb7008624e014539b101e1ff1f3b48feba0261da01. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/KRA381952202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb78ea384a58194c3b8b0d9170e95facde4f2f6683b46852a5ce3c07b92479b1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/KRA381952204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e56c1ff24c471e7bda1d09c1080282335df237a911dd30f6a45dc40964cb64. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/KRA381952205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb965f197917f255da234293a8dfb6a6bfd634e47ca804e8433b6bb2d859e138d. 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/KRRAR2302267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a0ad5e653e40c6c943c1e0fe78517a2b2beb77d66b2c064f2ef8dcf7bb8295. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/KRRAR2302269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090c5d835825e787a2cd265a59e46e3c83dc8e05d82e94f7c482ff17588ece85. 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/KRRAR2302278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb575447e2fccb3d28569ed1aa7593287d3bb963ae09904f686d7cc929afb09a2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/KRRAR2302280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c179c3bb4995a24ed0c8bbf6cd4467c79045d1ed37be42c3546c1de8f68f34. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/KRRAR2302281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135c32e8bffb523e45e87f472fb08ff7007cbc62945ccfc9a24f720544c286b5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KRRAR2302282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e9db586731929916bc7f77b839c4539aaf1bb2cbb3e7298d300cc483b08d3b. 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/KRRAR2302285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1933450d3c5dba1caee870fdd18390b66c430428124741dbdaad508855049786. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/KRRAR2302287.