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 0x7deaa746b90737912c7500cf707e38d31f6b7a6b516ef74dc6af9e267ba057eb. 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/979b508e-a652-4f32-bcb0-63f407061288.json and https://artists.proofprofile.net/proofs/artist/979b508e-a652-4f32-bcb0-63f407061288.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 0xe5b6a32bac4c92b10f31c989dbd2d9282f5629a393f8a274e8eb96d9c2aa612d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRPI81702040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09420d7d03fdb97c2436a622d0d4c4667f0d380cbf1c3e24c040d9492dc0afe4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRPI81904550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e0f46033c7dd324a05826fc6165b2278bdad03e30bd78a9ec9216fc41108e2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRPI82004820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556467ebf290f97b95f7de4e47e550d3b544accbd97976869d0064740c26e1dc. 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/TCAFB2088564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445c14d0ee6297d50055276139a993c6065fcb8634eb1e159cdd20fd01a43ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12026275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277827f326ed92455f27d61dd3a32972582ec3034f05c4ce20cf3b689ad2fd25. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12030289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64e217e221e27c6b02aa76c1beec785bde8ac1e32e41301043000676f89ed7b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12030290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445c14d0ee6297d50055276139a993c6065fcb8634eb1e159cdd20fd01a43ff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12026275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61247b67c73a0872046b9c6ff79dbee6e75bbeaaff59c4acaad234f1fe2003. 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/FR9W12123561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ba24207fa5525d26749900c8e13e329915bea198aae1e04e72277e8b62bbc5. 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/QZNWY2120074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f590b3ce574539c713368b0ead2a91d498f3bda0a382a822c0533240802d47. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWU2165717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc2817c78c8a42cd9952bcff87d612a4e70b59dc2632484110cdc710d26c5f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWY2120076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8fbfa3349f9f008e06503f1b683b6e28f1fbe6295ae3c7a21c3587fe367dbd. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWY2120078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18537662ee540b58097ecb04f0e47a0a827b52cf53fdd5e1ffbd4170626d9e19. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/QZNWY2120079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d36ef84322c389879c339989d5dc740df853726b67975df79cc9ab4988aa40. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZNWY2120081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61247b67c73a0872046b9c6ff79dbee6e75bbeaaff59c4acaad234f1fe2003. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12123561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488c47a8f7612d6733e63932e65bc70e9f714c25a456172412ca44b99669d13. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWY2120082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f1757dd4f2b7d1a35dce59fda086a2901d8c37e37c1873496acfd44e8b1d95. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZNWY2120084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7178c761fe550e1fe0ff4976834a1391e64ec306449e4b480f652226b954e934. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZDA62393257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904a74f41fd301661f3062fe932b0725009f83e18311640c1b16710abdf6f9e9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA62393258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa80ab1b19a60bb0b5514495c30cb708fbf82d108772fae3148b50ef48b0b33. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62393259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5041def357122f52fff383bfd202d397c447a28e2e6173cd532eb1c1b1b724. 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/QZDA62393260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd985ba49b53a2c8803bb8c60a8e27deb951892e14f3aebb17ceba217abca10c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA62393261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c73f1d300aaa8c90db42eb68189cd192e2073492ad6375e92ebb499b04e7560. 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/QZDA62393262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a2f8ef8ac7186233abb473cf4e3fd80e8c9734b9a73f5811e1cf817beeeda8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZDA62393263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb50dde4a5b1e1425a01cd2c8a6d726178d27a2325a40dcfaf06d2a550f9c4e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA62393264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cb4c07c7c17af59c42d12b3f0b47320b825daf8e0a5196b2b44b8996ccd6d7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZDA62393266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5703669bf0e37ac06ab06c110818033f60de300f30699a301066a72c8e49f9b6. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZDA62393270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6ecbd9195de3b9a5a2bb35507f5314bedf0b34666926b643da9538133dae8b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAHU2496410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf277cae9490d5214bd973fbd998a4cbda57fbcdcb27092e03558aee6a77aa2eb. 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/TCAHU2496481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553689987016b90c1965c53688f84a2865ba9262f5926d4b86d8b5a017ed1ec3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAHU2496823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb81eefe58e77a4c9f175df1e736b8d5ee4a3175e96577ef791c31e7609b0077. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHU2496860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a2285f92042a3b62697060e29a8fa618b8c91f55d4d2584e465a90b9ab543d. 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/TCAHU2496893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668396fd08c3474d8c560698afcaaf162d75f575183bfe4dc1be222f91ff76f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHU2496946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce7bcab35f03a8a663cbeb96ff88e88e7b7cc125f7c4627af9491adbafd441. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWY2436502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d20d5fd5fa2d7daf41e900b037c2ba521fe8c29d98088e04111fc0a636acad. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRPI81702620.