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 0xd8105d1fe0a31d300c1bfb351b4fde6d1cf4098d84ffa5f631d2d35f5d099094. 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/40021614-30a0-4dc9-a38a-5ba1a4d83925.json and https://artists.proofprofile.net/proofs/artist/40021614-30a0-4dc9-a38a-5ba1a4d83925.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nordvisor: Ett samlingsverk från Nordvis
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 0xd7377e0d709cea994a2d49e6ff502962d4d0f31b844d4eb275e6eaff5ba55e77. 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/SE6722300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6427ff40443a894aa76f688afd3c36444d4fed1cf8d8a12f6c24732ca0a34c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/SE6722300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc573bfb61ce4253d91cb3019d9050013f3b973dcc4c7a972dbf9d2a3d52bf64d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6722300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb482d51b2ca3fe3bab7ca5622960b6ea6f484a1ea18e0314c62c4bf6b1439db6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6722300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbfe4bea4363b38784fd4a2d69b574219085e1a084b2bc6ed7fae0fda1926e1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SE6722300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa799cba4d8b96476b0ab098b0d6defdfd7d595adc3dca9bdb515d7cac38c7e20. 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/SE6722300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8839b06b397db013a33f82ab4559663b2a77ff638858e13f43461fefea45245b. 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/SE6722300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7437ff5828f8eac21d2bae334b5b3934427e4b0ea90654c8d8c4582cc2e9ef6. 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/SE6722300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbe5a889d558cba3c9a9e28a56ec336dbab7ef7d5a19bde1faeddfcdfb02db9. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/SE6722300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c4de7855b285cc9a360a2048689e028cd1d2be93dc52aecaa52978417360da. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/SE6722300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc06053f3e6ae4f39671477c6b79041df5af04f5ee89434da48e42b8f3b11d3a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SE6722300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055c01810f85b7ba4f8387619a81fae7dfc53df70c42a09cd46887f50b87fce3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE6722300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98db741cff920e84db8ef11e117d39544a22dd5cf07f2d5b433d16a4dc6dbcef. 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/SE6722300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd42b13d54fe35b020b3f7d94beb409d7fe2105599fea111fa94283be0f4e0b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6722300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbd4b55fbbdb82b9e24eee0a8b041116b581ae94205def5f10fc118246f613b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVVF1703401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f26eb1be064c49d0d381164e41f10e5d52cda5ad70057aa1d3362662c30e6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVVF1703402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe203c3a5f39756b4968b288342f4900595892b1c63b583d855dc31e0fda0e192. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVVF1703403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1727410f3c26e7cc52db05f10a6808e70670037ab94a29faa6d0e071fc006a93. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVVF1703404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5340bd525eff39faec1cd4bbec97fdbacfd7b228e86c80959af2c0701f6da7. 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/SEVVF1703405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb0c487981148a7cf221839576316207529d7f2bf59c5307f8c85a9389e9d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVVF1703406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b19ad0aba220b58c46eaf651cd2898603094a1771852ed5164292e422ac9ca. 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/SEVVF1703407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199d2e97a964080f363d5f7036eaa6795bc8b474e4df6c77e1b0f1f5f57f919e. 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/SEVVF1703408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d86285a8127d69f93e3bd08b0320f6aa41a8fd478d1c8063063dc3ea1809027. 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/SEVVF1600401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7757aa6a68a00c23a789f31cf7df8a93d27841d562857ab73755654116ac0d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEVVF1600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27aa9099d3c7b7876aea896fc5b7c36ea0bb85735eeedef3aa1f9c66adc3457. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVVF1600403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb79ccfc61f6e559d8e502b77f58377cd392b8ddc445f5bd752bb0b3b784a66d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVVF1600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cd9b198b9a6ebef1fc9973956a0c672ed3f2692e0778d4e3f207dde2f8d820. 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/SEVVF1600405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd6a2b88ef57afccd6a2700237442bd44db629f33eedf301962fffc1b32beda. 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/SEVVF1600406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ede4ac7b5647738561d3b1f306b9f1a6f54cf9c10de7c8c805278c35ee2489. 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/SEVVF1600407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b907dcbd50e51f27a106ee2007fb763c1bac4f34a709598bcd646b319765419. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SEVVF1600408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5308a66a7fac598da6325aeed2a60ed9639c6a4e27538c89b6f63c5ce8bab0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVVF1903001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff49d8e3efad6e792b445487ceb9f1a6ad8f68a9ff3981b2ac4112afce07ec. 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/SEVVF1903002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c444799e263711ce9acbcb05ef67e137425a5eb08c3e131d5b56cde6dfd8403. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVVF1903003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31eb6fae169ca26002c37d7f8b29aacf4507f12bb329e46d315564eeda4c568. 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/QM6MZ1930528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5372aecbf928a510c8d2c06c3e79ba7b68f01fd14fc4e6283361df7dfaf4dbf4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ1930527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e36cac48f8c0f09b193d8d9c4f53299943dc90f07fb22b618b935b3dc400681. 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/SEVVF2007501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aaf64b3ce1f320ba22dcc1d9be87f839f92aac4b1dc699d1dd7be5a41fcbb8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEVVF2007502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd471e9b7e695f3714567f0ac2c739c0d4988008c9164c38fd6fb8a42ace44f2a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZ7R2494086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c1f31def56def9547776108ec2a1cd5beb6f8c0bb9f326d872248944e7c47c. 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/DEPI82502299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322bc0706b0d4544114174373b8275d3b20afabacb3cbc9175d86bef3bd801c2. 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/DEPI82502316.