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 0xd7530ad204fac7523a231771e6c1f04b4a001bb43d8b60e4e55e3c0a27adbc21. 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/df30ce32-f432-4aac-9f0e-52cd1d1959a1.json and https://artists.proofprofile.net/proofs/artist/df30ce32-f432-4aac-9f0e-52cd1d1959a1.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 0x580021b5a3d63b573ca51cd4b566fdcdb8f40e6701eb8f55e0fb0f3cffe55a4c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBPVV2204973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25421e8c9b1c0836bf4ca20c5b3b1811ff5f6b9ad9184cf076cd9cd342761919. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBPVV2204975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69813f540607ceec96d59cea64f8c9353e07368cb20771a21caefc25154a02b. 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/GBPVV2204976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441414f34b7376cea990bd6ab8ae7d2d21f8528a5d1873cef1c989c3d236cf6d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBPVV2204977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6605f1ec78c0cf167140fafe25f245aa43262a0e3f82cdefef33b35877037f54. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBPVV2204978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd3d6f1a70660e3e8ae2b5918c21ca889438f2c02188a5e7c06d149f352067. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBPVV2204979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58239f13db83935434eec6f732311fa6a825b3000c55e19bbf14b23d9c044d00. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPVV2204981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa253168f284fb5737c14feee513dc5c3b01aa86c65d9a570cd1fec4f89d003. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBPVV2204982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553c581f3c376c8f09e8a818f2db534dcd40f32c0c69346b5a94ea49006960c3. 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/GBPVV2204983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02821cdc04eb29dc75a178b342a826220ecd72b5f3f14e9c97948d1bbc129931. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBPVV2204984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae6c9bb1c239c34b87ee41bc2af668b41c8562bb1a939fc9491993f6895aeb2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOV7L1902011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69813f540607ceec96d59cea64f8c9353e07368cb20771a21caefc25154a02b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBPVV2204976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e19bdd11a99b086be60fffb7f643ab4a5c033cb2bf8a5669915ef91f795452. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/GBPVV2300717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f287265116d3dd56b34337da11179db835af4adb9749800e167c4ca0098747. 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/GBPVV2300715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e19bdd11a99b086be60fffb7f643ab4a5c033cb2bf8a5669915ef91f795452. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPVV2300717.