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 0xffaac8241932b3d231a326cdaab608e336f6ae582774278c29f059b6d79b1ef3. 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/4e6ec1b7-2080-498e-9146-fdd876c0938f.json and https://artists.proofprofile.net/proofs/artist/4e6ec1b7-2080-498e-9146-fdd876c0938f.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 0x1babdfcf0fbd8ff439c3e4ebb22fde713d29ff8537011e2a49a4b3aa482295ce. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLG661600363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e429b1f511402ba4ad04c08546d017b47f57d3ae586b10d57bed8c739d478. 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/NLG661600679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3750ad507dc1cc15ed54ebd6b41b5f3fe2415a3eeef95ff826ee8b3dcf49a2a. 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/NLG661600664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff142bda837f8d4a2c35ebc2e28b913ba396fbcd8f78f8e7edcd6fc561ee45d4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLG661600681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499f083f406d77da36064f410f291e79200d253a6522bf2710f44beeb5bda515. 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/NLG661600684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09422371fbd982037a9f5074cac980a4391ad2d9849358667d6d83b1b8470533. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:09:07Z), 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/NLG661600678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834f18bbd9d2f57299f576c4ffcab5e3cfcd7c55bc05ddf0c5994f4803d4b015. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/NLG661600680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f627ef86432ae62c1c0e2160dd056a32a492dac96c6559b9268c25b38e0401. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NLG661600682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd993a9d9777886e969a0ad0cf68e12344354f3d3a92f51addbfe2c15e5568433. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLG661600683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c346316646d534bcad0c988db109a8aef834b8193ec49a28b704227380afe9d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLG661600617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d47f135e010f79d5f51d4b906f5b366bccf8b68f14b59a05108fa23b61bfef5. 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/NLG661600770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2291788abd181fb351a239a82472c1357911acbb220c45f52f35155eb52b27. 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/NLG661900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fd131dc1dd240cc1fb04f28ef1609b643f3ef4de0c3664b23934d0fa3642a6. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLG661900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb44e9b22813c510475538754a901e6a345079d50b3be3b87c00bce26569b45. 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/NLG661900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc2ad3419af3cea8c1b4ee5c2789f29b31546ed42d366cdaeeed01d3de831a5. 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/NLG661800181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d2e694d9d5b0e481e76620ebaceafae356290795cc7cf66eb643e5f71b63ec. 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/NLG661900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd5d15e39a64e438c09ae50693e6fb7c97abd128547a4218dbd165c3c0f6458. 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/NLG661900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8399e9e0e86a8f6c36cb679598d57285a04a2cab439c09b8162fa7c97e9c3df2. 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/NLG661900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28f5f7b12bd0641acf29030f28559e4582ab7b9a0c7ecf7c527b15c5111670f. 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/NLG661800617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902fdb00bf8b913797c5e27b4461ebf7a0fbaab396e43a68d413c5d08e1a962. 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/NLG661801053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca0079523708a0b9c5bd6904a8e7b9565872c2d7562891858c02dc6ca6973a3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLG661900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b6578b760255d57f9a6a708f6e33b92b9df1d0f41cb36ff7c103a3ac61aecb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLG661801054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a835fe70bfa5f74fdb95e027ae2bb9e2ff1e87a0e3092d96604fc40452ef925. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLG661900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7545f42ef6484a57b79710fcd41284e2c6eb651600240c1d20cd887673e42e56. 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/NLK2U1900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e456f7277d58480e3d80441b37c8a4484e5f3a5f442d234d84709093920726. 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/NLK2U1900340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de5476727df1a2fab48fa769b5957a57a35af1db229d99d14acb20563520112. 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/NLK2U1900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f808acc8909c81f79fcd896d3287c1d9b91cfd3a59e0b654ed9b386ba9fb4d. 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/NLK2U1900348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2a60275f98cc78ee8a58d6cb8559f05d84bbac3c9283dfc847471f9990dcca. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES62010243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b9df01af3248845e9a9d31b0919fc66f1ab5147dc0fb69de91c44f3d81ef58. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6K2036538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24148b83bf64729bb4e7945817dcedd39c39c0ad99868a356aa855ac9ddbb48a. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:54Z), 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/QZNWR2070265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4880a679f51d9c32f2ee38d838eac36fb10f6bafd90f0bec79e6ec1309ead4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6Q2148388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90525c6636593ee15ff49748d992cbe739c186dc4e9f3d9f39361913a152d34. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6Q2148402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f3315b00fd79f6679af01c81ee0b1d9b15666b5f2caa5d36b1284912854cb7. 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/QZK6F2105153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6218bf3c901162d2222e96c822567b39086df85f646adc77b820f59bd907023e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:56:49Z), 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/QZNWX2102681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ff0f14e7e5fd782e051362e467a56c937039d823bba120609e005ce6855e01. 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/QZK6K2235038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699f249c761957be0a937b945ebf970eb4b384a6ab4cacaab18b3dd93618b1e9. 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/NLS241700688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0caadd53352995810be28507c87882046c4f45ee2408883f651c487d0330a1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLS241700320.