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 0x59678483041fa111fdd561a313dc77b64592afe98b5e5ee4752d81fac5ad113a. 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/700330bb-384f-4445-a562-930d9f0b0ea1.json and https://artists.proofprofile.net/proofs/artist/700330bb-384f-4445-a562-930d9f0b0ea1.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 0xf92b248d2fbb17f38c3ef777bde08c89a32cacac916b0206016bbb220382bc55. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:15Z), 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/PLB179500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a83772ee839fbed65787fd9e250221e014d47ee651d924b625428cd56b103c. 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/PLB170701319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a88791a1c09b6bd5f8497082dc7e61f62efde8ef73f5e18d298dfb2f59be5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/PLB170702532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9623e0422ee5d9e9324dead9c1d23ca356ff94c0855b58d2aa2f830a543b51d. 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/PLB171301320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2282335aae6851c6ef40ea3f89f1f55f021855110ad4a7c76463f03e70cfee61. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PLG551500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb879e6a7ed5a55db198cb35939618790be4d6bdedb1f616357ad5c4b11ea4d49. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:15:46Z), 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/PLB179800241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0f656217783a8413a3561e9f36dc2b65fa4b89d11159b7a0aa66d3df39dffb. 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/PLB179900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aefa7d8da008e1b8701dc9281771ab8d97ee94b2b8a17f9c212f2e8a0404fe. 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/PLB170000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e1d4d4e020b4bbb8194e3640b2ed4c65a2745a4bc0e6881767692c8bc78e97. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLG551500029.