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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 0xa2caa4aa76177df5b91e874595e6cc32d04f7498aa083798445b2a7df924ce30. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/520faf06-601f-47f8-8909-4b42594659a2.json and https://artists.proofprofile.net/proofs/artist/520faf06-601f-47f8-8909-4b42594659a2.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 0xe695b2b5b9fba8ed3a71679edaa1187b83160e0ed39068ac4d32055a377afa3b. 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/USY252172967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a983700801f69633fb492cb2cd82efaee340d12836cd375ebb22c42f9bef018. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USY252172971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324dd68f258e93b73852ba2e28cd3fcc8b7076181affa745c85421c2de83ce0. 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/USY252172973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bdb0f54a9b756bc8c9ef551de818a2ddb3c05a1f4617ddbf1d8aeb55f07757. 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/USY252172974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3634c656e366becdcf6fa0d3e2a278f0133f4055faee83688b0e2a6048e833a3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USY252172970.
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 0x3a8619eb1eb55f84f9c065848cb163f769f629d61452fd8bb66dc9d3c581e1eb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USY252172975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346e929b0cbac22e35e738726a2e3796f40a0f0d130cdcb525f30e9cdc232f0a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USY252172976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d199d114eb7e43fab4af21d8cb28909ebf7c038a59b5a9eafed14d7526030. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USY252172977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eca4c114c4e0ff41aabc98f3915fdb077499a72bb23917c56dc7ba1c0e77881. 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/USY251702744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d016e94e480801e703546a1aacff677421313a857b8b080f91edfc491e5e2e. 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/USY251702745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc92b0743f06acc2fe35277132bbb7897b41918c2297ddf10a11dee25d64ff4. 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/USY251702747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c69a0b1987e29e6555347af1291a816e157a594f81f8695b30f5d8b63b08037. 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/USY251702749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb94fc9164dfc5c569f056e16b005036b256c9112eebc2fd675be623ab4285f. 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/USY251702752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc071a5bb56e01079d4104e84e43b47f776d3312ddeeca5af50cec9547206cbfd. 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/USY251702753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb64c1c41708f63a8574d543f763e287841e1d94ebc615ac97dcd45915939d4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USY251702746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9856b3f64dadb940ea2009514f90cfafd756607db87339109ab457f37ac6e1ce. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USY251702748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fde2a1e03c618c140bcc269846771ab5f988d0c32eb0422b5bdbc4ee56b0a47. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USY251702750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abe15cd0b5cb48ab508bcc046e08cb1211ffb5601f41ac8d44c887d367c0a44. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USY251702751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf14d4c2f1a115ec2bfca8fd81277da9c669c98416d9a483af4ae26bb2b79363. 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/ATN261455402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f47a1d265a6bf9e6ddab61973064f4a6e504999534a5af484c1f0aee5b8b72f. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/ATN261455409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82afd7093b983c174963b06097533d7aefcd5234ea02c3197921f00bbcf63566. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATN261455404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626d34ae91038e6bdec18c798c0d1b671a3a29b2de6d0c3c3f8ff2e754feed04. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATN261346501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa810090c08d0b06f59dc09d4492502761b98c730baf159686f48bee2994e0a25. 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/ATN261346505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9931b644fb4da3617960b63271b27a6bfff42dbde19cbdc5e7911a2e3e0ef9. 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/ATN261346605.