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 0xb5f7f2d2e1c8eedcc5d2cb1bb97fc8dd32a759616e50a34f7ecfcb958e813886. 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/1101f755-303b-44af-ac7c-5856ed74ea75.json and https://artists.proofprofile.net/proofs/artist/1101f755-303b-44af-ac7c-5856ed74ea75.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 0x9e6a9edf1043880add2cdd417b584b69cffc8702e2a4bfecc6e188109eb8819a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUMEV2437537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f41fd7c7a5ed2a48e13fdd2cdac123ce7b07d74e94088f1e9fd45a3b4ad7f. 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/AUMEV2437536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bda197f13b6b072c8e9b48dc94962722f54e9b3abc23a992d44da2d09cc0452. 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/AUMEV2437534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9efdded839b775c528c7d40901cef51aca10a62f66f7c1fd5589bf264a77a6. 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/AUMEV2437535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5924871014b4c6cb0811598a44cafdf600a00043605c6ba6965af70ac7b7899. 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/AUMEV2437530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f41fd7c7a5ed2a48e13fdd2cdac123ce7b07d74e94088f1e9fd45a3b4ad7f. 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/AUMEV2437536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9efdded839b775c528c7d40901cef51aca10a62f66f7c1fd5589bf264a77a6. 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/AUMEV2437535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bda197f13b6b072c8e9b48dc94962722f54e9b3abc23a992d44da2d09cc0452. 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/AUMEV2437534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5924871014b4c6cb0811598a44cafdf600a00043605c6ba6965af70ac7b7899. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUMEV2437530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c0d4189ae5160608b7769b8ad714f742c8eed38deb1312e8764c76dff08f72. 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/AUGBT2321731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1080901914e18b962f817be31190ae41de950999f6e7725683f0a708517fc83. 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/AUMEV2242740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e52d35710485789ebbc4063e0226f1dbd3aeba09d3a340e46c8fbdd88461f1a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUMEV2234959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd564cc43bdafa9ef32481e04577dfce8b41e23a169c57a6af4920d4482a04343. 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/SEBAA2001401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cf410689d54abc164b91f18e325a239fe83a3cf05378ab74b63c9a1fa8a471. 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/SEBAA2001404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d730256d95c2c1c08f4a3fb8e49c62b15fcba3ae3d71871f3cf0977db5f58a4. 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/SEBAA2001405.