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 0xf7bf22696027a76aabd34470e4a523232f3d19540e173b66c600be6930e0a903. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e7af716-268e-440d-91ca-4aa1965fd258.json and https://artists.proofprofile.net/proofs/artist/3e7af716-268e-440d-91ca-4aa1965fd258.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 0x53ba485a7e9180d6e32212242dba8e4a575d071760d1d9216ee64a7a9b108941. 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/CNZ852309913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d7af94a2e4af63df751faf9a3e8e5687b9b03973a22517973322c8d8fa6f1e. 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/CNZ852309972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacc5e8b5e4c968401590cb14abe9ccf4b25a0eed92f7311660afc2814e3832b. 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/CNZ852309973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c678efd006bd6f67faac1229ea8fdeb6abdf55c129a05765bcde00e511850f. 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/CNZ852309912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e0b5d1551e1c4af73bc1d4530fc19f3540c51a89cc616b5c40ba832911640e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CNZ852309974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515a196e2bb57a43772944996ed141fab1c4ba9c01651492d61abd02a0ff4f3c. 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/CNZ852310240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ad90539fdfec3d793cf59c34fdcee7d0a8d2280177842c97df402047a27ba. 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/CNZ852313261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab016a75069c1f825197f2be06977268d71b142122752bd8901131067ad98e0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CNZ852313260.
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 0x9c4ecdc3abe01633970b49b213c0730f3a998fee5b843a88f13cb69c8b1b1d7e. 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/TWAE32302925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c17fad4595af879a11f98e045ae19810de25a473b95f4ec1b416a79b8bf0840. 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/TWAE32302926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cebadf95f77f2c82e9a301cfbaf544f0e467abc88eca6d4f751a185c52a0ee. 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/TWAE32302928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c15d132cf62d7731e3446238437ee02632d0a1a6c37f6d3872abd43309d371. 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/TWAE32302929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b06b03491071b59ebce02d67fd7f49b6728ec8ed503b43a7487e801e140b7c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TWAE32302922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55331b0ab5a6a3d3003f4e364229a64c2e6fab1d5e1f2348fe5496cdc555ca67. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWAE32302923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cc83ab8cdf068b542d862297cd5d77fbc6b145a2ec88d2ab3e9041badad301. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWAE32302924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce78e8fbe47389f8faa7c91114dfe1448e819a8d1f6dfacfa7548cc39f29e5f0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TWAE32302927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94481949fb44198d1fdc599fe551ef8d19b548930abf7901cfaaad648d9dacd3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWAE32302930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb30c41290e2e3a6a5466f3c6682012b23e1b93b4f4e8ffa1803a3a713d052f8. 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/TWAE32302931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633c9afcea5fb3b1e8fad1461c2c24b0ac186176273bbd8ad205388b503c8bef. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TWAE32302932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd59c05132f668fa8246b7f3013369f87ef1df1a6e57900f20002f5741ec6ac. 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/TWAE31901097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1630f7d69d4040bee1f815ce3bee024ca6073caad2a73d3edddc25f0465c2a9c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWAE31901100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1093df279128c8cbc94c5da3a2a5fb5c6481f27f720de8677d481c25951809c6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWAE31901093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e7ab046eaace9cfd0a55b90f03101f33b6b643f7c6181f7870b50cc7d0edcc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWAE31901094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88796c5ddb10fd3b895664d57f6472876541f926128a767148ddb00377f9a9a0. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TWAE31901095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0e63fc5793e9ef33c23740a68025e93f5c517145fa1c4e90bae8f10c1e9039. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TWAE31802344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae522eee0f8e8a866c76d008371a222ab3e683efa9cd4d65daf13f3fa73e3fd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWAE31901098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54e22f2a0baf765a96c8cafe20bc8db5d1e5f3c46c69bccd9d2de5ed7f69a9. 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/TWAE31802345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8171d384fe61ea0de5bfa27006d794e6d9ef2f07bc93b7c13a239a1d4e923d5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWAE31901101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c699f7958e9adf201b696e004aa1a2c4b6a1c44bc42b2a7e7380a22028762da. 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/TWAE31901102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ad1de9f242ccd69d4045838a952062e955e7df09153566787ac76306dc289. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWAE31901103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1361d923614f18918b095674e080648c563ffde96dcb00a0bfd61dcb2180fa1c. 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/TWAE32202513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0de848d3eb1ef581c5050dd56d81272eaf41b5d70c8cccabf1217357e0f8c12. 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/TWAE32103579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb832b6d9a482d80db428bcb3c99bf4d762724655f63e606d92fe9cc5f30a71. 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/CNA231602609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3014b978ccb8e6f4c417d2c45610b251990d13d59125015580aeb8b8f0a7729. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CNA231602641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957871f6ef72f32af70c4d24c30936ce7c78b79886e8ce2b48b43662457f63f6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CNA231602640.