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 0xe5b3f92584cd7f226753daf765d37e6b55e87324110e0c628c83a31b92935dee. 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/68f2e3b1-d0f0-4d23-8e61-d551a0a1f971.json and https://artists.proofprofile.net/proofs/artist/68f2e3b1-d0f0-4d23-8e61-d551a0a1f971.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 0xc2c808ec21ce29dc6765550b6cc2f5e7258822481368c9ffde9d71cb877071be. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL2086437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8f4906007f109e60f3652a3093138af668c217ecffe096f12d77a8b894653a. 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/US3DF1829100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fceb0c44bde73fdf7be9d3d6e0cef7b3364437f5248e8fb2781327421d0eb89. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF1800621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1285538fe21165180da74936ccc47d0fe3a73d1c17fe671d1f662f61df8bfe4c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF1720626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ddb7b7dfad2f2d730fec98554df1b81f1e080df3d07f8037f6f6e486ac0ab1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL4T2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c73aba6d0155905e72fde46f6c4f42cf8b0fcd4a308222468b7613e1973df2d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZL4T2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bfb00f23a8f5ca1757859058e6bb6ec74db02aa7a5a571c1f456de047076d7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZL4T2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8db765225b15f41899ea1c402377dc03672465ccebb18460594f40c31241f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2353055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48791e8030d4d44326ceb32f31ecdb0aaa6d5c793ec417029a10cb69bf2ca25. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2173954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c5fd96fa2ff7e465779fe0b2b14bdbd7f63a39c9183c2131ee4fc8108608ad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2173899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a034afb59e220d39941b9a58fec70b6a5381e19ccbeb5d7bea95ef2f9f1149. 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/GBKPL2168284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f45383f13a143a859fe5a24373d77ce1910c442f3e5858784f3c49bf98d01a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL2164126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9014dd1cee3eab540f86c503527c8ce8c212db0b5ab2237679f037e0036dc36b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2142550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ddb7b7dfad2f2d730fec98554df1b81f1e080df3d07f8037f6f6e486ac0ab1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZL4T2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c808ec21ce29dc6765550b6cc2f5e7258822481368c9ffde9d71cb877071be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2086437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8f4906007f109e60f3652a3093138af668c217ecffe096f12d77a8b894653a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF1829100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1285538fe21165180da74936ccc47d0fe3a73d1c17fe671d1f662f61df8bfe4c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF1720626.