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 0x4e2b9377bf458cc296e4449b2d64160209c362e9da25c341d10f4b321056c2f6. 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/a6a90eb5-8412-4d80-baa3-3e717b370c1c.json and https://artists.proofprofile.net/proofs/artist/a6a90eb5-8412-4d80-baa3-3e717b370c1c.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 0x2e9b18b77fab5d7a694142c317c285b6d28801bbad8cacdb552096b28b6f225e. 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/DGA062258822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b347d3a7d84b737dbc01678054525ea95cd868c1783c7afed85cde4029c8b4d. 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/HKG732429502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138cdbd7ec7be4c5293efc8d5eda97caa1ae3a689c2b57c80c38f6cf67c469b6. 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/HKG732429503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841e51aaaa5b02279ffdf4bf05a2fc459bed706c3cce75a692b08aaf7e141ae4. 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/HKG732429504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bc4b36d561bb0365518353ae13718971f00fe3cf185c3a5ae0745283c96442. 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/HKG732429505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d69c62df259ccf73f3267260b21d8b568dbab909425b37bbb8e4db9519c32d. 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/HKG732429506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb296565227655909858ff4985559844d35c3c610ad9ce34984b698dceec67b40. 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/HKG732429507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ea214394e9ac65af87cbe07de6e61304ae5b5e4c2ad25abb64ab8f93bc83ec. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKG732429508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b915cf890af0fd7efe8863304134eab18e5d713f57384a3575df66416fbe0a6. 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/HKG732429509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee92c10469f14bd2c5687fc011e665d7adb109da756e97a4060c94992d3da66. 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/HKG732429510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6660fc47110669c1266d9e46675a69353b96e78a309f704a3b1d2e4a626fa51c. 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/HKG732429511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b836b3a59f29bc9e5f0269cb9be2cd3a374d473499c6c631658ef2be0e8c00. 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/HKG732429512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89d9988b3df76f0eb4ff2cec5139593c767d4fa79cb080c1a02a882fe6400aa. 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/HKG732429513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eccbc39853308d736e5f78b27e0c1aa453948341cc43e5ed9d0c9eb028cb0dd. 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/DGA062403645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16199879dfd4c05ae6442ec61830d7b66e0324f609fa54a2b8bc45431c9b4f0d. 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/DGA062403646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded5c97292656200ee73a75a0ad95cb8d226f7891224c6d43cd9892a5825e25d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DGA062403648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdf27527af1650741ecbc7bbf7a7afe4adb3c56ae8ccc304a89119a23c29fe3. 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/DGA062403649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf610e6657a4f7b54e9e8d9c91be079dd5be6c07216a1141eb1df03dcceff47df. 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/DGA062403650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26f815204c3c5fb50285d7a972ae6e8a2124d34fb43370a299cf38e8b93ceaf. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DGA062403651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee105060040d8b1091dd8e2c8f32ef11744e25e81739a3ad2a1179c32cece4ce. 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/DGA062403652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc612b6b712a8049c10eba3d01d243fd42a72bfcf49d917937d318d6473cca76e. 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/DGA062403653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c033d12f8cddf82d93612377ceda41dbbbf23c74033c5aee9c66fca88c8e824. 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/DGA062403654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5336c2293d6babcb58bd8e6c97b2bb932a225ca7e96e33d42ec40b8ba7569d6. 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/DGA062403655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe0ee910ef40dc138791d21c0bbac8d95f52f81c5df0be205d76b8a18e586a. 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/HKG732387967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe0ee910ef40dc138791d21c0bbac8d95f52f81c5df0be205d76b8a18e586a. 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/HKG732387967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3be5935b0b42640161b33f9074be80516d6dba6593ca3e506a8e0f0a7c0bbf. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKC372468099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4990c95032e1fc88be8a268d81a31d4891b72c28e848ab724182bfe2b1b84d91. 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/HKC372468108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e0dd84f4c5e5cb4b72d560bcae30a4c6a4c52db70b5bf55452eb7d674384fd. 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/HKG732331556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fad269dc2c0c8f0a38ba88bb63dc8af7c94752995459850706252ffd45ed7e. 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/HKG731661307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b487267a4f0808caf3f56a7341774b96357b61714b8a5aa753c1bec081cf7d. 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/HKG732376976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631193407c6bd1371269470f8ef12bbb8fc025b01018b6f9a39b991df4c7c4aa. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DGA082284280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca06ffb60f226672ee910e5748fe6fd68250f36409ccaf5d41585f7fe76b12a2. 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/HKG732243504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce3bb57e9b92704bb32cf4a7a6e326dd2ae112ad00f79329c955afc12739fc5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRX452334199.