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 0x99c1e31861f5cf9fdd2bc3d7974764d27db4edee6dcc2d78a640ff49df8d98ab. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b000352-40d7-4c25-add6-0bea7ef09bab.json and https://artists.proofprofile.net/proofs/artist/3b000352-40d7-4c25-add6-0bea7ef09bab.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 0xa2dcfcab953a50e464f461ef210f6b397e108b8fdf117a2804c73715c850aa42. 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/SEYO31500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbf354cb8d1701cbf7f0f502e78dc765d7f1331d8e75f9ac1926833b759c40c. 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/SEYO31500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffdee4d4cd7cec861dc9ae7dd1b81c0bd110b8024ad31956d77df7fbe767bce. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/SEYO31500109.
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 0xd629171b6fbd9559a74d2720d22489001ac3a0b3a4e3eb945c5a64502e498822. 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/SEYO31500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ad8cbd52bf8500b1ca33c30d0c928e57893d8b7fba060073356c0b2d7d0f41. 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/SEYO30900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0754acf37c1ebdd7d4c6d144323f69b9b3413999640a43e8e94805cd2957cbee. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SEYO30900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b3c4098546d85a2638346a4347eae0d82aa884771f8c36aa27f6ac8e15f06. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SEYO30900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d73a859d82fbda7abf89ab041cc50aebed516a3ef104f79c70ac95be24ca251. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SEYO30900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b33b48b6a6f5f1b571828bbd96f1256f301390e04a52516a238420f2f29836c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SEYO30900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b2a98b67edea7bd4ba14aac1bb24bfd969a2fd31c071af31f5f1c90315521. 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/SEYO30900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a39f70aa83d58287a28646f4ae0c9c3b1f165ce1bbe2b0f2506c6f1884db5e8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEYO30900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579be4a5ccc773558e9e78bd78d7d4a41417ef9b72e21b322d28c838f6ad6501. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/SEYO30900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad81d4ae471a140085183dc3075184fbe3d565d34e8868f667fffcdff7756f68. 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/TCAEO1900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ca34de3f1bf382b53f3eb3f5adcb15709e0d9b1e3a9bb76dcbfe6365fa2b6d. 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/TCAEN1998824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52b4a65beb3875f9faeb25dec1a99516e04ed340cc37b8bab076dd9b72f7a9c. 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/TCAEN1999251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b46db84955eee89c9c2358a54d7fef1f0efa6029577e1a5d4a9231f5d92164. 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/TCAEN1999244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7563352afc37fd8eb28d804383d57ee05d89ebe7ee51f95be430fa46be01a83a. 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/TCAEN1999325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc976d79a873ff3fa8088fc0293d4f654c6416779291523dd6e4835d97b3ad947. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEN1999253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada0f1374c4b61369cc8d9c3b942f43f8d78865c97c9c60551894d37e60337c6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCAEN1999239.