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 0x50250d9195dc3abb025b35df3efbc7bf077156f9febe54f9ff5cd1ff1d9c0d39. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adcc4d68-6efc-4be7-b534-3ab680d3ce2c.json and https://artists.proofprofile.net/proofs/artist/adcc4d68-6efc-4be7-b534-3ab680d3ce2c.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 0x162cfd117e120d3e47ae9aa8af2a8e89b02e9b61bbf393f8ccfbd14f8157aad5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:04Z), 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/JPR500800564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b8e34bcadf241f52e65169f2551578de3be44e73dd2a026a7cfde420218991. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/JPR500800566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6090d64bcb52cbb801952b0aa4bac4e6739e498bd9d7df66e33ed4731015a150. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/JPR500800567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0f1280adff9100e3dca363bfd34ae6e3316857338705d4119ef18ab85d5e0c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPR500800570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b551cc9ec62026ecd6a4a06fcb5f62c7986096a4ef75331d8c375068c750f7f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPR500800574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b1e44487d06f39005fc29ce6739abdbc01248d75859cc720ffb62054bf9eee. 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/JPPO00324900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb706af7ee860dc4740579b0d29db2839ea0af1f71a50b31a869bf3f8a88a4b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JPPO00324940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf718775e5fe81b6f2f02675d8281737e3f34070864643af866cc551814d4cc3b. 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/JPPO00324960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffe14cbf8a773d18771ecccd9709c34ce9d24cb9074f6ab04691122df48d8b5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPPO00324980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7446c19a6514d9355fa90f23ccb574c9a7dd581ebc265267ee80bb3fc55e202. 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/JPPO00325000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d45d28606dfce931d63fed780e3e58c0d0154da337ea646cd5f1d3dbe28614e. 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/JPPO00325020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbf1a74adfafdcdd9e393558cda4017b8023b18c9be90c708bbedac84fe65c9. 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/JPPO00325050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765cebd47705400a160310497d41fb45538313313eda83582fb134fdbe06ddc5. 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/JPX601500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90360fd0b0a1d04a1bd0546de5cfce75e889a6237f168c930f310793cd829f3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/JPX601800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5cb4864fbc97362c6dedb60b8012b5028b22eb2ee7f8e3f662f46f7c2c574. 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/JPX601100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429da0b9d13c1b66fc9a8e0c1dc2f9cf2e6d5097d6b5ff83444e876d4ba0bbbe. 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/JPPO00260250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f67d0e9fd47d7eaf7633e837cbd88e6bbaf9855ebb83dfb607b9640474180. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPZ920600054.
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