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 0x00dc6af109e3f443cd4f0a174830e098d176ab4c6384c26cad4dfee9f5333cc3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71485f31-c558-44bf-ab7f-a533d22098b4.json and https://artists.proofprofile.net/proofs/artist/71485f31-c558-44bf-ab7f-a533d22098b4.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 0xb1559571aa12d9487a4b038b1208eb66b42adb809e15ca6767f83fe79b11164e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:36Z), 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/QZW9K2424959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2666d1dc243f45143887ceed1a05c5bb622717804b99f2c7a0d92dfd0cd75c69. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZW9K2424972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23094995db83fa590b2fd2834198eca0ce4c303fa0c2200ebbf02da253bb175. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:16Z), 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/QZW9K2421551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcacf22927e60726925442ab49a626b81f8e8e7624bdfda0b6fa222aff41bd96. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:02Z), 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/QZW9K2425000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9cf02bac24fa6918dfdca4e25f751b4129a91c0fa04575a0bb9781592f7ee7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:29Z), 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/QZW9K2425018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832c6f45113f26dc5f0c92965c66a712813d07e932e650566024064e7b02a8e9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:59:48Z), 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/QZW9K2424990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a743c34023609e1c7cf3e97ce58d88397205492b402dec274507a694bbf3872. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZW9K2421549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210165e50a4dbff1a27e3c60b72d9d8e4071d4ec2a50289fcc229f765ebad3b. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:52Z), 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/QZW9K2424999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xababd705c826af3b87b1a645b4266cda931d3513bdbb87ed078bdd5676cf5d36. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:17:38Z), 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/QZW9K2425022.