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 0x7df4d22d22ce56811e5099c58d22ce41750d122206ac28aa33f968a09004a5a0. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/190f9867-dd3d-4585-b946-bb95e3b1b2ec.json and https://artists.proofprofile.net/proofs/artist/190f9867-dd3d-4585-b946-bb95e3b1b2ec.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 0xf716efd15f129bd86ad8a8005a5b037e6676a126b45746ef77fc627113ea39d0. 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/DKADG1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6de3766e0a9197b4d651980f4836fa0b925199a98fe97aa96239a402a8110b. 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/DKADG1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd74483e74c9ad681b9a53391483a002874371079338def9ec3c2c8c7fde55. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DKADG1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb403f7d3d4a3dac957ff84e131d6500962ab2f2105f8da20b35416633795f3. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DKADG1500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc811479588c51fc72c663caf2911ce3ebbadd70f7988e2679d66fc9923eb7c9. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DKADG1500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65076c18153bad7c16cfa0d7c2b01054b4849f7c2f93e01492b1c13f0247481. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DKADG1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831bc4851db97df84e79dceadd0fbb7cb413d772f331fdec8ef7f1c0495f4817. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKADG1500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eea53d8213865d8d15ee08949a41b6cf873293a929a1ff9a0c1e24edceb60b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKADG1500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8117c97e1b060a36dd39aa9890fbf826e5d6e64802cc00d37d42ebbdfb4c276. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DKADG1500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef2076e30095aeb5b779321ef4f872c008ff244f9110ddd185b1ba6d5e224bc. 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/DKADG1500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dddff250b68fab544fa7bd122e6607b33afbde7eadd16354cbeb9b6984a563. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKADG1500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6623f455376df3e4ccce1c0bc9980d76d4bda53370bc79d4a62a85e637ee0cf2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKADG1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabf12efc982abbe4bb05cd06ec6bc09a6758dd1c1723b86456cfc3dbabbb4a1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DKADG1500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7dc9396dddc646d6077a1c23349a743579afe0ad0b6a97935125da83d07863. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DKADG1500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea54ed199680216e15bf2589e56dec9c34b41a3473a838e981fb1df0d1a9be3a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DKADG1500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41891fbe13c8e29e72a4a1ae55b9ecba971a0055b8c9865a74d747a63884202e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DKADG1500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc347a0921d73ddd9dfa267a72eeee7921aa50899f0c3850c06960ba7bec00304. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DKADG1500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc663ba76656fc3d0eb08acc2efa605ff5293532ab8ac6c329806e0dab91ebc. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DKADG2000256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91525164380fd3397a7733ba21c690f929c4eb3c3900005885a857d4057d02f. 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/DKADG2000257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba183fce97f4c95d32b82215a3a307cde7d17dc918edb7bf5fb6d62e8680b8ce. 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/DKADG2000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477ed7194c64393df7236a7b7d1f1bcdaaaf741e4c807c579a9c30eb8f51014b. 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/DKADG2000260.