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 0xf3fef7cab3290feccaf64b28dc964e681a0b0c92107c4bedae1b5bfc2bc9dd87. 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/c2161178-922b-4969-b886-4e719c0a9cb7.json and https://artists.proofprofile.net/proofs/artist/c2161178-922b-4969-b886-4e719c0a9cb7.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 0x7eb7659fd95562db47944eb5e24f12b5a5c126bdb366cd393423874b1a7505de. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:39:52Z), 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/QZCE61834505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00054915a124fc29613800ebac2ab03b16cc7159513bb778896484c059c6eeb6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMPKX1820229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bdab894d0179ca6f5ca150211512e191a4053933319131a09ae6e5df8b911b. 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/QMPKX1820233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64df9dc9c10def9a7310e0c35aaf3467dd1d90273a67df367d21308e2ba8fd1. 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/QZWFE2375976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f6c0a2d4441df24557a60d1f49731eac4bc3a6ff63b6426215ebedc503a96c. 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/QZK6G2434579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba5e61149a9416e6655d471fc80c8690e1bc5c08af9363e2a67cd5f78d60bd3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZHNB2481759.
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 0x319f5641cba8b3a640898c541258e0f1aefedf008a28db8d6e757d610136f5cc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZK6G2434578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356957821428a27a037980ba624c0e277e5cb23d8e106a6fee79ae8747bb31de. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/QZK6G2434580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be216a6dc3e95ddd92a18ca9092d98e4a1d2bfbdc3ef3df3e876fec55f72af7. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6G2434581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30441a3963bdb0f27380884aa1d30d894f77408ea98b270a6f0323fc3bc22dbb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWFR2345222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b2d73bd07b69a2d7cc11e0c3cc469ffc538fe6f6aee344b2d00c7c7fa9b0b8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6G2434582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2a743e4f5e0ddc44961d4e76ec60b08b384a173f81151b1db57718b663e3b8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN32462701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb3d38c49d86e290de61bef7b17dac7e581a193b50f78f22bc0c55cfdb2fcf1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6G2434583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbea4d93494fbdb6373663b7377ef7fe4a10bec4b8c710b5270d343054e2bbf. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6G2434584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12f24846cc2baae4a27acb51bf1220424082d018bd42215aa9e000f0f0d2cf7. 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/QZK6G2434585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251c2618b99f89b0a62a1bb4044a0637f8da01436ef42d1ebaa4db4ef449df88. 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/QZFZ32580626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e068d49d1dea5faf5d9e1ff4cb12197e8c6b2b3d2e2694936ab7b6db3c2ef97. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZN882534594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1656083a70c998888287047416910794c4a1eac2727ec01a2f7f47d551d7dd9e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNWY2528216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7b1afa05af9fd5b42b24029c2fa01e03c396d9cf984ef8b0a33a629bac54f6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAX2591807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d264948c466c7c316d68f848933b48e6be8a88aef81dd4353af3180f21f6cc. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QM4DW1844295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47679c594b4eaa34fb080e7cb662114e83c9903defaaa73002376770f6cceb7. 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/QMREU2101476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77577732bd6e477d55dba0064d4c5c6def6724f8d1bbd7aede786b25365e45bf. 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/QZHNC2079974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b9d49eda7f9b63206ab1d53781ac14f6e7c14ca2518f52d0d6079213ec65b0. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZHNC2079975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b3c65757789d5b38dcc368c02c8fed908552279714d22546f2c50c35ea41d9. 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/QZHNC2079976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56980ddb518afb5431ca7722c0205227ba0f9e1254682031d567e65e92ce73d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNC2079978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa462fc0a9b609766b3729c97f8078b9076b08a0853d15aac7e9032a4421694d2. 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/QZFZ22071049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a445fa8c3ee2d3ddff0778c245a0f02a24a615d9f0f7f2079d2fe6dc5704a6e. 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/QZWFX2428647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2097ae1c2ea8b6495adb44bbbf082e7fe5b5d81116a4b431087b9992ab2861a3. 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/QZTB22324828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6d6741ccee3b21354e3f82d5c25d60c0f6c2e783299f874dd1340099fac470. 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/QZTB22324829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d830985ced80855d5e43bfa5bcc7a6cc47a724e231a9aa3703639546303e555. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZFZ62019746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef707a759011ea947a64e7cda57e027d89fe0aa01eeb5db2e5be9ae06ba40e93. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZHNC2079977.