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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81250bf16438512d6da2e4ec3db75242c981658c43870c13b65fe1e0382433a. 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/9c48fa4d-205c-412e-9ae6-627ec14fb630.json and https://artists.proofprofile.net/proofs/artist/9c48fa4d-205c-412e-9ae6-627ec14fb630.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a682ebbad3cb633396db4552639249d4010954b49591984eef42a56755ed763. 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/TCJPW2383711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953e6a62a3931dfef995fba6c016c5138170d6784577fcd8a23a239c87a75426. 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/FR9W12033191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b142913d99f94f5ca6c0c195b472c928842a706f44ef6789483605e2a81afb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W12125279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad5da486ec75919bb8735267443ed1ccc15908a3926e10ae441e87a9316455d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12135095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d1288892022b0bdfb7349e6ee9724badd232aca348c247e8f9407d0e0555a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12114618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe925787fe89b518c21954c7cb60de4364be5d73f6e0dd54e66d8c16610422595. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W12100281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e58f70f4269580d9ec424a133638a7feed534c88319db5a603f508da6ca778. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W12100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f655925fafa99b2002f420875076f3e0a7f50d0bc7bf7f17cb0b6ee2231be7. 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/FR9W12225867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d1cedd6f813d3062cd6e156761e589f4903d51c3cb790f299d0a03e94cb4e4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FR9W12301022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734ddeb55818ea3be8c0217489d669e23f2db85ed72959e334ad8e2386467837. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W12237841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11799fdb45efb1034fdb6942b1392f99512534a604423cbbe72147dbff04e8e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W12221465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa001ffd61a7b6bd1dc783073451b37ce03c9790e90c9fab4ff1b3fe38c51cfd5. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCJPT2293986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44aed06f08459c27a0629ccca4cb3618e114664bbd3082d6b5bdfc204e61822. 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/FR9W12306678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e17a08c1638bf5358c6fe701f0dbcd077d929cbb689ed23b0595904dd08acd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPA2499227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f655925fafa99b2002f420875076f3e0a7f50d0bc7bf7f17cb0b6ee2231be7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12225867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e58f70f4269580d9ec424a133638a7feed534c88319db5a603f508da6ca778. 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/FR9W12100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953e6a62a3931dfef995fba6c016c5138170d6784577fcd8a23a239c87a75426. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12033191.