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 0xa5bf1721295c820c0398ce809b7dc6e4fd12a59dadc497e1acefd2996a7f290c. 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/6102bad7-7203-4bc4-bd20-7c6dc4914696.json and https://artists.proofprofile.net/proofs/artist/6102bad7-7203-4bc4-bd20-7c6dc4914696.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 0xe1e6052dfae02c2df92dae1d403550f8ffd38b61314b0a660e6811d88e7cdb06. 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/QZK6G2195827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc191f0cf303c8b6d687c91b6951f3e03c15b7c4df606cfdae5e270f852fd60. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZES91926364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeefb5423308966223405d12ebff67e607b1932d72b43f5ecbb458a266076775. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFYW1904812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068c321c0c3035fcb03e0a209a2d7479427d487f1a6c0155b322d449dca7417b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZFYW1904815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8829c7353e3caaece0b4e3a7df32b50f919804e5abbbcc4e87cb3c48aedbfd87. 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/QZDA71998201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b0bc982c12f96f0ebe32ba238be8ba078992e79e7fbb88dd479154680b9406. 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/QZES61921660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b5ae10698d0e31ada5db2b68a009825901428b671c5c83647b47eed327ccfb. 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/QZES61921661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44208a7922a47a4575323f610197eb3e734e7836358882a3da36dce64be2c744. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZES61921662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e27410539ad368af8d107f8ae24833ae2da6ce9055eb3d788335d61e5deb8d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZES61921663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea58a95e717d81b434a851e117437cec83f0c8eb980a6a6d6bf0c9c37141a72a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZES61921664.
Lithuanian Flaiva #2 Invitation / Pakvietimas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9e003ac9abf4d639ab3d265bb173aeddd64f0e610608ecf7de8a2ca4dd84c3. 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/QZK6N1915450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2847c7555a09a5c24307c45b5c45439fee8232eb6dd02686e7198a0a45f5a178. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZDA72002128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2986a62864d63a292bd034ed3d1e1448423f098c811474ccec6fc04a463134. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZES82053121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2fe34f5f628951ac06a419b17c4b503cdfccd4c1b910211ee7fee4b1d4a897. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHNA2096833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dd6f20ca9e8b89799998f8ee2017a0adef9b041eb4245dc90232e33ade6a6d. 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/QZK6L2088039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba131b0733a37c6a2f87608206768317746d63e18683151a913525e922415068. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6F2045321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9f23744fde46732f5d6b5717dfe52879075857afdce78a70bb3e5b811a3c33. 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/QZMER2010278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40d0348f8310302d522453afa594f194a651f42c395293ec0222adba6ecd802. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNWQ2098405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6d0f2738306b0b1b58b33706deb76b9aa062e0d71e957a27f4ba6bfc764861. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFYY2116475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ede8a9134ceb71e808d28f68664202051f3a3d4398bac02e896988cc19ea63. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA72193786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312b36ecdcec6aa51faeb511cad283e246c9f3b670423734c30a99322ee97a63. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZDA72193789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405143e4d2dcca05b1ff2feb3598edd7ddcb7c28f90b0f1ade508edc6cecbfa5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA72193792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937c3c6505f6c435de9c574868bf4080425bee0127598b52db953020a6a7e314. 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/QZDA72193794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b887e5fb25284a40fb5759d9751b74b67cce850b7e350547a767b3af51af2e6. 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/QZHN82129874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bca08425f3e20b20c4f7decc1ca1d8e1152dedca080f5560d4f885ed7a5d10f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ22213649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f3c8d5428eb100781c05c2cde2d42ff2e466518991ff07057bc5f5203f9cf6. 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/QZFYZ2352988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058b4304a186466c444ed42b98e6c7cb9f842782606cf1c3b208c292303cae40. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZWFM2481101.