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 0x42e69b217a8bdd8a7782e0f6c57518996e7b4690b2b4b53a66e27889e8156778. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d192c511-5633-41d2-907c-173a366d1f4b.json and https://artists.proofprofile.net/proofs/artist/d192c511-5633-41d2-907c-173a366d1f4b.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 0xd2c763829ca70b5ffaacbc558e59f8119799006343da1d142eede35fe807fc77. 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/TWA210014601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855dfe12b8dbb8939511319aafd1cde054b828e266b7a7b91404308166d95dbe. 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/TWA210014602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd467c58c8141f7fbb1c65b35c8085e9b746075815192a873c61f0482a77e0201. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/TWA210014603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a727574c6e41b746de7a6567d3f237d50bc25b8b15b0f4bfede69253e5feb8c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TWA210014604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ba70a792c1f04dcee1b6d52eea384293690796761f6c1b0577c0ff05c0d733. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA210014605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f90a5f33739b836432610384ac79223289a5e4a0b9606932a670ff5ebc67cd. 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/TWA210014606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f7ffaba90ea5c6602ba0823ff3d54927099b32e05c751b96d408f17174ee98. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWA210014607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cda5a2473342c11c750103f400e189898efbcd64b4fefc70482a1176c20877. 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/TWA210014610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f1c5ea6b11f10b41996b8264480631b8d06649684fedb9f5efab48df008711. 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/TWA210115901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bfd1a7eb0e9a66c545a8fc770d1d542ca6f203f405736c00839d4e58cde1d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA210115902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55e0e6d01d84feb73f2ece8ffbe3b98e1aecf56f555626be6f9a978b3e9b4f1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWA210115903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d1793cf3a9c3d2af199a580f1fa6c559b8280544681733ec47edc56e3261d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWA210115904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19311c20045ea45cc9919c7e53ec6e72fc0393fffb08d07b153245cd1acaa735. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWA210115905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7cf0a56292d9d98a382902ac9c510194846846d3d0ecf104deb204a08300bb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TWA210115906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783795f25a4f40d5bf0b5e43eefa65703dd18f28fcad5f74945d2f2fa35c6ef7. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TWA210115907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9946a9c0e362ec9da79401b57f02c2a486fdfdcc002fdffc29ad7c9b03916. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWA210115908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71299ca357ec2acbd977ff050aa4dbc783e4ec44bccecbf64bce202695f5c03f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWA210115909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855dfe12b8dbb8939511319aafd1cde054b828e266b7a7b91404308166d95dbe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA210014602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4db2d06a4cbc9bac32851913dd2adbdae8edf580f08c6a463e5702825539f0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TWA210015106.