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 0x884c090ca84ff6b8fd8637a07a7a6f7eb4d69d02481489042953b7d8966812e1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37a6569f-5199-49e6-90ce-fede67102229.json and https://artists.proofprofile.net/proofs/artist/37a6569f-5199-49e6-90ce-fede67102229.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 0x362ea54fdd8f653051945574b3c47e130c6b272b043ce1c5d4b9a394078bd572. 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/QZWFV2427823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a4c400b7e1fb63547de9828f7bde4815f8569ba36fe3aae5f650e07eca7aa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFV2427824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0989bfbdb59fff7a91f92714ca84e032a5528835eb67fd1e714b2261d7f088. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFV2427825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea0708e92f2fc0c6911afe6d3da623b0cd2e45b77b3a0cb936ea024452183a5. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFV2427826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117131704a1f9b9b3a7794d2c19eebea36391fdd77e301bf9c9a27cc898b951d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFV2427827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ee6e07888a3a701b79542878adafff623fe0642914113572227759ad1b3950. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZWFV2427828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c51e2610eccabdddd8d607909a4f2dbaa43c6018edd707b3d80da12952bb8a8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFV2427829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa182205d8fee0ad39fcd7e3564f60324101a481d73b1d50777c9e4a0f57a8e5b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFV2427830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead0e8846bd17599dcdc6859c11b23cb34ca73ab3262a7c9de6b611cfaec8a2. 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/QZWFV2427831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6967ef264de49cf727c7761be8ec70f1df1eb89a988ca70131d935960733b6bd. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZWFV2427832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df378c2c6a0c1b825771d1fe678ee95f9863d0487eebe0bdb9d56f6f020d2ed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFV2427833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33109731e0a535028b87de535a1048a8919cbe6264922847f1d8d869646d4f2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZWFV2427834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f752c187632c8b0488cf8940054ad82031725c0381ef9b2c6f67c99bf732f5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFX2436700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9cb0dce6ff5cb9cdf0f9471a7c199ac3cfa2ea9ab2a311e438c673a78a9574. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZWFX2436701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd9ee3959d38cd581e9d94f571932b262996d1e3d917359f7364834bcd7297a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFX2436702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dee24b877ac45e80007ae52f1b257dc8f17e369c76ff1fb87db06263133d6f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFX2436703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c89c578d2fb5d158555cbea478d62275c4bbdbe89a3bd84f634de8dded6d17. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFX2436704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3b8b02333e475f58d11bf40238bb32be106ff0032f1afc83a70266b8b8f682. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFX2436705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1608d76b940f9f9a992bec04cd9d7dc981e7f98c367caa759dd796547a084377. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFX2436706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84d4d1d062dc70cc0c45c9e1beb4c90b001c648b939bdf213733da4335ed8ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFX2436707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3afb4cd3276cacacfc49bdc09b2f66d67cb88b09630241e20ed2d39e2100a5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFX2436708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d2a58abb8430bac62dfd29ae0f04af87d995bbc8d336ea913119d4f204ee46. 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/QZWFX2436709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f45d695715518457f56860b7d41eabfbfe3116eac5c6094b5bffac8b1d2c11e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFX2436710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea30e43170b12990d1fa8a1467e2995aed59cb9b39dabffa2aaf0b7d2dc0df6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFX2436711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b3ae10d7747d8572b55450cdad934fd8a8f0b3cf49bf261ad09c66b124d747. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZ7U2403383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c51611b3b26745bd2dd272e7e83b5f93d1d94332964fb9bc7ede49ed6c7a647. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ7U2403384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd382727cbf8e12105c4aa6662b1c2074faaa5d100990faf5968974758a7d7a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7U2403385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fcc155954b509490a2ccc2b1c87ca583eb477f8b7fbec805422db40fd24724. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QZZ7U2403386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1a00592aa6e15f7d08c518bf1e298ee6394c08a74d731951d3d42000aebbd. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZZ7U2403387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb768689cc4a58462a95d0cd18c3f4f166cb8e4e4daaf7af8e90dfd21bdd07df9. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZZ7U2403388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c26dd645ae377850b212795a2ebac6a9414bdbf9089400a861417f81807d74. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ7U2403389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1454a0479cbc046144b1040c921b1cacf3f4014e99b8421e35dc670d521f8a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZ7U2403390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1419c274b43513511368a6b6a5ec6cd5c849a99735941991f2b3cde60fc5d5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZZ7U2403391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4772c98c85371bbc189f8732024eaab8cbbe87635bcb0b8b86d23db82e3368. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZZ7U2403392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302577e541ca7a0499965306ba732ff0f497219c4698854745523783012babde. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7U2403393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3dd275fa1463e928d3d98223ee26731f26f5f1241d9d97f19882ed9571beb7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZZ7U2403394.