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 0x39140d571ec378eb7d35e70840a235dee767b8ffaba1d9102821c884456c511e. 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/4d3f8737-de14-4690-b0e2-557af632c68b.json and https://artists.proofprofile.net/proofs/artist/4d3f8737-de14-4690-b0e2-557af632c68b.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 0xbbc4b04ded5c85d317a5488584cfb90ca68b25b2726e62123c1bab41b1748556. 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/QZK6M2312302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3276a65300f96d0e75c8052f683dd50332e6970c3ad84e41aa8ae46e5154413b. 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/QZNFJ2404957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc362fb2ef7da88a40342762a28ab8c3bca934d3fb13a5478a0067e0e40fd198. 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/QZNFJ2403049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c085130c90c24daef21cd09681a1d01beca5d7e2f42bf9e6c5f4b72118cffb3. 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/XKA032400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f1b15185e537296472cf50426e42b096401c5d60912bd94528ce311d4a2362. 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/QZAKB2401557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9221734446471a1b49355023a87655b7794803a98fcece59422ad7ed1b9ba574. 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/QZNFJ2401043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19581891f9d5782c0b5f335fc7a727a38679465274e27eb2af33cd93cc281635. 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/QZNFJ2307251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302d7ec34ecbabd191341982fb144c7ad7a35954ae5815633f2162d604dda393. 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/QZNFJ2305948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58eced553058cc8e572366d0ec80e5591adb6a47caba82330ead4ade29a1a33. 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/QZNFJ2306210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f82e6ef9851c693edc3ecc43967e185b0386e344adb14518122aaceb10be1. 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/QZNWU2310560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f82e6ef9851c693edc3ecc43967e185b0386e344adb14518122aaceb10be1. 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/QZNWU2310560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930eda20df22e1058a444494f41482636d5955a35160cbc79218271689dcaf5f. 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/QZAKB2323786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dc6708061445be71dc4bb55850adb887ed7cdab6200dcf16779c7990b54aa9. 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/UKGCZ2230073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c25752be9039cbaa2e89eb410676132a6dfc6acd65e293bbe4dedc8ce303ccb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN72213499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489e33a86f55cf3d571c4a299a4c7c082a342ff854aab30cd5ecb92c43b4dacd. 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/QZES62176523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324653a5630a46346f914e85a911fb3f0d901f3f3eea974042895be2da4aad30. 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/QZFZ42176091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bd87d527f0fb689633c63a9d086d90c632cfd35ce396330535a9d84adbbb71. 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/QZRP52146144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0660fcb688b47ce035e7562f433c92844253c758263da4aa7cab642705b67b5e. 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/QZRP52146145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf944665b66019fb11814f24552d559c8da97716ece916615ae4c00d61a93d01e. 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/QZRP52146148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930eda20df22e1058a444494f41482636d5955a35160cbc79218271689dcaf5f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZAKB2323786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a205e30b643994f7b5ebf7f182a0936a91a7b5b99c7e8158484265321ce557. 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/QZAKB2381394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9195996de64fa20acc8df206e2e5a4ca115152a2222713d628c22b85c6e57419. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZAKB2352770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a7077682f29a3d7a007875fadbcd539ae2a1ec849f090f569de66e6d41da15. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZAKB2371268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68bee4ed9412b4691730d42e08046335d2c830a71c1e0d5ae2e92828f626a07. 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/QZAKB2383207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36197bb611ad212f87d9c5116ca50246f33eee7183a4114cfadf66fac4d66bbf. 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/QZAKB2401385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a64d6355f204dcd8d2b67098ed9a19c185c02cb5b4e51f723330f79f9c3f4c. 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/QZAKB2377538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb78e6aeaf478322ba80706b55f4a6c12009ed10b0c3221b51a38d40e7c76b4. 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/QZAKB2381732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6e8dacdbf3277539e4f4447291a3c3ddfa5e783f67aa99fa29113f3bb4b072. 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/QZAKB2330445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf144545de9102c0c890ca8f79a12dec295f3910dc92783810c07ea10ebb0ed. 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/QZAKB2347379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cf8d981df2fdbd0ed63a5585c872c8ef7f40836e81041006597d424c494e7c. 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/QZAKB2365057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd024809415b2a94b26a1c6b8e33d7cbcd8170440e15cf69cd5759c698e8b1337. 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/QZAKB2380779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a8151f701b76157da439a59e48d89f4db0eb5a12ea5632480acee83634c9ca. 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/QZAKB2322004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d51b82f24239ffdb9c6ad26eedb8efac7ce22a21bc0db050697133b6975a3f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWY2348848.