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 0x4a0ff998939c772ca7eb44bdceac8785a7bafdf94d03c526b6f0d55f2d30a1a1. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acb12ec1-7a4f-4eca-8c5e-4308c484bdf4.json and https://artists.proofprofile.net/proofs/artist/acb12ec1-7a4f-4eca-8c5e-4308c484bdf4.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 0x8ac27ee9f12ec0721800713757dee55c685f8c76378f9a8d40ac958239f25f19. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:19Z), 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/QZES72535923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22cc925000af966816a5140c8e1cc001f5bfa6cad9733e5c6323f060f5a6899. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFH2586353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1341ffc994f9f032e0978f9a11c7d2b31f50ec3b5ad31fc8e910df371b103ce0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:29Z), 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/QZWFJ2522410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba01d94b78c626ab29b27a86c19035de6a04cfb0b7c71b20b34fa60f02237e79. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:00:08Z), 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/QZWFJ2522415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcad94b6150bc18d48cb67926bf79edb5a3f5ba3aede84fe92908d9cf3ab0e5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFJ2522413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc085db0b94dc589ce3a87f19f8cbdd4d40d1f6ac833a7dc9fc1a554073ba41. 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/QZWFH2550878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086de654c2ae99a28a0ea3c9e96125f91d134e3337a82090798d65c685ef6f64. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFJ2506545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d220d2201bd08534949a1d0d3d1d687fb79408f86fde1f9ff7bc1827d05c29f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFH2562899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d359132d9f732e73272038f0fd3c14f75522144dcafcb1b44e6d5e9fa5406b. 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/QZWFJ2534868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b85b2f4f20a69dc562cc7e275fa3cf2790089265304800a407045f9b3d92fee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFJ2508948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605fad1e1ff3f2fef4ee64c6e583b586ce8e7630d06a85a31af6848389691cb9. 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/QZWFJ2522416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f46723432135d398873e1640ba3108ed58b284ba04ba119f1387e9c6a98934. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:45Z), 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/QZWFJ2511697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c341c03704b734805f0ea021f4b5f64234a0e383066b80a796fa530f54eb264. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFJ2519864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bc4350c0a07cc0973f843805b75acdd51aad7a56fd9fd1c229c09968557bea. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFJ2514462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf129a811e6f328af9403b2c20565f8e70267a4df9e42f786ece7ed00fdae0e7a. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZZ7V2532389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b900b294bfd1d2d72de96c4c6e2ecb81e1e1a6d28982a87185c31f29c99ec. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7W2599473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1168a7dff4545da9c4c986d80b84568f847c9748addad2872228ff74c1fe76. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7W2549649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c781cdecacd7e0e1647d3de5cbc40697c0353e9173e29f932956357fc29cffb. 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/QZZ7V2529846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef56996896849d57954738a457b1440e454599cc0707aed13e19ae7db325df0e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:52Z), 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/QZZ7X2562106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722d45fcb8e5e352713e851d2d552a618711e4178489a2615b78f628b8ede739. 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/QZZ7X2562131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d4f45c60fe850ff00fbf2ac3183969bc28a202934036961d25434750110b46. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7X2562126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5138a24490959d84559e6bfbd1574f8dfa4c4ba67f6e180c076681c806c361. 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/QZZ7X2559382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab2d59e4ee4d8308fc74f424ca57d139758a422c0fe659724bac48ae9312f8a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7X2562128.