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 0xb8c937a97b672a71f9d5c827d58658aed67fe4a4ba90bfc47dcf1958fb2dc933. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a61b41da-993f-414c-b19d-1f90ce1699e5.json and https://artists.proofprofile.net/proofs/artist/a61b41da-993f-414c-b19d-1f90ce1699e5.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 0xe76f3d901e25e2f6509c47cffa2f3c7abf2239b51b33a9cba21e934f2b29d3f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZVEM1861037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ac7a85564b75c84a4a28594443b2d0c8231c65ddba240cd298708e414bda50. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:41Z), 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/QZPYN2571734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba9b36580cd017661fc1f8e3d4cdac0261f2643fe7ff99affd52ca8bb3311d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPYN2571738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce6b4b0ee58824ba074a8c20f14bfe238d6f92727e20e02e05d1f2ace2d3fd4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPYN2571740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1972b3bdb40a3d2fb58cb3a1500871a5edd580ba50ed298b9daa63828fb880. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPYN2571744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6aeb4cc86facf89fdfdec9eea2e0f24ee5c3037c64d3c8abca23a78d2b3cf3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPYN2571746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a4cc0cdc5967e0d32f475c18be9af647e06b8efce8176b6e462328934ae042. 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/QZPYN2571752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c2d70d052712021b4516ad77014ec0f4ed04c82dcc19a780505b8d83842866. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZPYN2571748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0791699d1650bf08a0c621692202cea613d1ae9fdffeb0164bd779d43545710. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPYN2571750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60967a7d6711641b4b6f35b18b17ba4ef3eefc6b825c517ffa1f317ba24b7fb2. 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/GX3Q92502791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd9e5b78e23c2eb6429a3003551026582982eec720755faf87f4ad0fa1b641a. 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/GX3Q92502725.