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 0xbbaab3bba62a3d041dfbfea5dbc47d08be36af052ef96a9b99dac5bbe697ced2. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86ec5b34-07f2-472f-a055-d03b90dbb462.json and https://artists.proofprofile.net/proofs/artist/86ec5b34-07f2-472f-a055-d03b90dbb462.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 0x7c6232f1e8d516293b358a7fe8731b4e54bd1ffd13cb4055189a98bfe229fc9b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US6680918386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579907ed2a02b11c56f14de93c79cbe660fb1855bb346e6f5edb3a1d760e41ac. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US6680918377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6503c85ccabde17201fb5ff1ecf1b3322e8c8d4e3a70dd05aa06c7b236c66a43. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6K2349042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282b69018aaff5623dddf55c1a6f892ab57d06b2e95b604045fac5012a380ba6. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:02Z), 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/QZK6K2389682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a282a21bd481a46b5d74f4377fbd64e5d696f8dd5b0b935ce4b7629530538ce. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:37Z), 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/QZK6K2389683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748bbeae3bd453804d9d3d047d8d8e316f2048d671c899a7a2dcc279d53cb419. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:53:49Z), 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/US92U2402013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483c26b6a0aeb03f2e8b8cadf6ad07a48f030cf3ebdad26887cfd8636c098982. 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/US92U2402012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88556c0585a164570490a29ab8d1319fe8275d1fada6d704cd615633227331ac. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:48:06Z), 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/US92U2402597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f778fff55a3d5e1750af812ada8d1fb9f2bb2b0202c35d1ceeb018fa7268353. 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/FR2X42104877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee586be384f4d1608aaee0d032c7cea89d0d05b8ad42d826d3d23ec13c923a35. 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/US6680917608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f2cd7022f2f29ce5f79440c4cb6dbad4f4abeb7f882985f56a3d7f340ceea9. 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/US6680917609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5dcbccc0b6ec21ef195038a36eccb7bfb6e2b986c3f37087fdc89b086444a5. 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/US6680917549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f23ea780f5b16194f90a694670751c825b78d92a88a6bd90672ecb267e5a28d. 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/US6680917611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3443e5a497f4cc83d7a37ac052354f8ab25c9d27e9234966f350ec5440ce35. 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/US6680917612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf5019637d45bcd56b0b3011325059bfdd9a03350d25018116d4da65ca49d17. 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/US6680917606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419e088f8cdddda13ab8195b374c6d15c749dda4b1ea4ea23a905b91b792c40b. 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/US6680917617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4db04d050cb9f2c1fa6aedcc362b5f2739302ef316e4b3aff791297246e9f8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US6680917618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605d7dd2350079635b4f4df8fbae01a62dd56bf0c7de1e2230fd487255ad641. 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/QZFZ31912425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb957a173fc008de3b03430916825040bb83f4d2ea918d6dab275b8b6e3ccd4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DGA062468364.
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 0x5761f2fbff24cc872dab520fc01ee290e041f0d73f1bbfef9dd0cb26fd79e042. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US6680917607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0710415b4d39f141d333f9a403836f204909065bad8a90be27d6a2eaa55bcf1d. 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/US6680917614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e237b401e441abfd57ced251e1d03d8200dcd67293f8487c25b834810ab9ee. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US6680917616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ea2197aae4f50f941b4ffa0866a5bcbe2c1ac456161b0b75f34f2b1facf296. 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/QZFZ31912426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee878d90cf939f9348dc49cacf65357d808204e874b978efbea30fa5878a327. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZFZ31912427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f1f4323c01569aa7e67c061d9c32e65a04dc024d2a1800ce2eb67863ed6854. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZFZ31912428.