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 0xe9ccebc8a3da6f36ff62479aa0912949ee9d3bb56a2c6a30cae5ce3f47df697d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63f7dd3a-b644-44ed-8450-299784a476b9.json and https://artists.proofprofile.net/proofs/artist/63f7dd3a-b644-44ed-8450-299784a476b9.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 0xe60bb29f44b6154b632811954ff955fd69b4adfff2a1913e1e9e0c21e098f94f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/NOR671801030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ed859eb079b0effbe32fc2d87e479dfdd7224cebd6a09c8cbdc9da32300524. 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/NOR671801090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67c6b3dadfa57922a33947d1fa864207ee72668828e5fa8852ec813bfa80e1b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NOR672102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce02cd9dfb03f6089009c8a5e805854c5369f25a8d9b67266ecf44c37927766. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:07Z), 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/NOR672302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38132e3102b4141a7748c3227adffde10c644a6bd39024216b0c629887e89b57. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NOR672301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaba14b925fed3d428fdd6fdff6d8803e198f19a014e9bbf378f9e266c7c9c5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NOR672103010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37dbebce9780143d6903f3fbddf8d67a2bab382aa79c483aa0940a611ccc135. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NOR672501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04efd2889bf75a4ce53eb9ec0d3c306033a557583b83a1e3c88ae471d65c288. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOR672501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9495f27f725e3052b555f35cf3d16ff0c90f8d9ddffd7fb8c29bc032193cd3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NOR672501050.