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 0xa9a6ed9663912cb31e688c2514685836149fb30d17245d19a5cb8058165ce55f. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b656226c-41b3-43b1-b341-aa4ea1f536eb.json and https://artists.proofprofile.net/proofs/artist/b656226c-41b3-43b1-b341-aa4ea1f536eb.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 0xe787c7ce24f57d0095c02878f1515a35ed6f3a41219f2cb9acee4b8176cc6cc9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZWFL2384009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3ac9e0e1bfe568dd89fcb48c962d0265eea997dd296a82d170fe597ab1e743. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZWFL2384010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91015c90580b5ee21ba717dad5732b28ce3dccedc652399b7cbeee3fed95545c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZWFL2384011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c2f43d194730d4a18501742c4f6707d03a09a8062b6fe6c5300deec4ee0350. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZWFL2384012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434df0db838268dd102619279ba48e6e192c5df2662d03cafd5d4398b184a384. 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/QZWFL2384013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8eff2ca1191a3f0ef528c90fdee3ba2c2a4d4f9c72e4aa0c10bfa40aaa2cf9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZWFL2384014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455a25e0cf5c472327d8bb82e765e67d33c9a08115047f2d0f3b1ca3d10c2868. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZWFL2384018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713ae451326cf25b70b8650eb84d87b345a666774e79fc289dfb103cfd4179b5. 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/QZWFL2384019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e641472ded68221436662b15a2878f61eed5fa1258bc5971314a85814570e81. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZDA62475920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4157f043bc0c51ed1f024a542db88dbc45094b571b9122baf7e64d1bb0da1a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZZ7M2471650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c839726d87b0f86f293869bbe892b01230bd71abe270cb32823a1b783033cef. 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/QZZ7M2471662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d05c2e378c51596f83ee354f90ae6fd3c42e2659f9ff2973fdb7e5348f77aa. 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/QZNWY2558164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfe4fd85c5d9c0e999e48e82ee6585a2c0efb12b48306f2afe7cd577480b5ef. 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/QZNWY2558165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6e4dd2c7a5b4b993b8d8ece5ec16d26d5b2ec1b649e39653b31671228d6bff. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZNWY2558166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaf9be9639093ebfa2a9fbf7c2c825e86392f947a0f2f50ec18060e5720fb98. 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/QZNWY2558167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c6082269a51de793efb04ee9e28638ba0d7d631b3994dd8c3ce798d3da3879. 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/QZNWY2558169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eed0771dd516ce888044a88cb4a318ce450922f7c10a9c11596ef89f5c989c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNWY2558170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d872774a4d67e19cf3b9b286c70382f6ee5769cc261bc01edc1cd1968b01ac7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWY2558171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d81842fa0ee3f837ac2ef264792421238497c30d6c3b84f33dfa1a656bdea1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWY2558172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ae88ddfb9399fd4094319746e57cf15f62ee6f1e4c650cc9068cdb6fc8484. 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/QZNWY2558173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6421091d1eeee164d095924c9dbc6ffa5faa3fcac435ff88c8d6f247ddbb59d2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWY2558175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd1dba135f5b814d26920d66d92159047501750de64e31474b718cae437ea13. 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/QZNWY2558176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a5c5a744fdcddbb852a40bf5254bacfcd23b72bcb7de04e4574027532b9845. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTB22598864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfe731679e2234b88fe0f1322eb99ebaba75bd6c87f98da5c44cc4b00b7cd85. 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/QZTB22598865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda95ad8c07b3775cc2e115dc1462d3a2a2551182b7ad63ede18d39118014f8. 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/QZTB22598866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3dddc5de19ffa0f7936534eea9e87e29c42022b0f82a8626cc99cc45f92a2c. 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/QZTB22598867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf2f0dfad16dc11bc96c37a6889386ce74dd6293c44939e3af0430cabe370cc. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZTB22598868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5601a07c280c0f57168049aa270c6ab4a4dd5ac5a4c6a8e9656b5d5f847d8c14. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZTB22598869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdbfd3f2a76700e5523b9c3549667bff59b3441144190f4b11ea4223e6a6bff. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTB22598871.