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 0x68857716bc57a65b039819f962376358c6c6640e07a31fc195b140cc4089f563. 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/4ec56765-3e9d-40a4-9ad4-4ddceb62f159.json and https://artists.proofprofile.net/proofs/artist/4ec56765-3e9d-40a4-9ad4-4ddceb62f159.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 0x7ff765ecaed2f78a064f591339352bc251cdf4d78b0314783817198c892e3d11. 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/NLUW22402473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0c4ce29af121d41333a3e4059d930c228d428c6fb5ffead997ad9df645284f. 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/NLUW22402344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d8710d84d70fcda294b3d8f9bd73f25e1c5b7166ee2bcf2526dd28cebff512. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLUW22302288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d175587dbb57006947255f9b5b7a456213bc9e7973455fd93ecdfb83973081b. 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/NLUW22302219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc531ed9db5106091d24621f8febcd0f907cd0392199f2c56d2665fd7d9bac233. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLUW22302179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe166d474428d494b411be2c49b493d793346c45f26ffc7a858c2018ca56e7b3b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLUW22302059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7dca67956e6c71e6a9c937fab68f2b1b2a7f81fb1b498bef73f1fdd0f62f27. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLUW22302060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e23651bc77b006cdaebe47e0a89520cc1c03381e2f75409ab6ad8270d559fea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLUW22301984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3960c956c60b92dfeb55bdfdecc26892b3f846c87d260e8b35d065bfb52882. 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/NLUW22201919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553d88435132a8a6f1c241c97637123cc11ab65444f1e00ce2970441743a691f. 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/NLUW22201853.
Thinking About You (Timmo Hendriks Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08338d0112a2497c46988021207e9d41561f8f63537ac1c9c424bfb85024a98. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/NLUW22201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdc499ee8bcaf599a72974d036e5e6828d59a1cbf9e0de1b21ed285189519d1. 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/NLUW22201603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce92875a852426ae2c804a01c59c5028388a41a486153a27a960da7a8057a96a. 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/NLUW22201578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113dcdfbf88b7fe5383bd3e09f8ebe8ae62aee3326ba5b9f33c29cd9aa40b512. 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/NLUW22201533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b58e7b26b0a0ad2b88520ed73f68560837e519a3427403a9cdf23aac67a162. 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/NLUW22101491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6885eb3d1ed4361042b40a877f48bd3415da23ed6e3c0c207cae1d59b844a7a6. 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/NLUW22101492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c3f0cdf25a69467e38078ba1de3e1b6d60eb63ab88c2fdf000bed9920ea6b7. 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/NLUW22101431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b14b40724655ff8941cf35fc350b085300dfb190ca09dce59e585ac2c712ce. 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/NLUW22101275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b39701080f46e88c467069d5839e17cca026766aa2209433d1fee440ff81390. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLUW22101276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5025578982f71ce7c5c811cc9d5d6d729c53157611e6963204635210487f81d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLUW22001182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92391432cd5e4701d19a8ee0654112a403af191f9b801c5fa9490638e4e2828. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/NLUW22101233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275029efc32b4b182f4427aef8dbb1a39a96779a1328ef6e4d7a7cd7fb94b12e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:23:43Z), 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/NLUW22101231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0aa2f614f2cc6c1f0f6819a782fcb3291d14529b766174cac2a0cb3a3e97b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLUW22001190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca0602e68cb20a2618b912dd0632def32e104ab381276cd5c38840301baab44. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLUW22001191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5025578982f71ce7c5c811cc9d5d6d729c53157611e6963204635210487f81d6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLUW22001182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1360234c1e0b3653c6d36d14ece9d72fde5e4c56061b331e4f6f699c1e6c7b4. 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/NLUW22001076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d986fb780f1779b9ea13260e621db6f37806afb3061cfef887ba007ac97f6be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLUW22001054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240ebd4c117b9965d006672ef3cdccc4791409acfa9d9de9aae1f99e9670477. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLUW22001021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ae25f2f4cfa983b2f3c99ee5668e857927341f3da87762ae15a826eea58ac. 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/NLUW22000965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e181297eed8d3340a69d56008adcd947e47f1ee96d22873113ac5d043da9bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLUW22000952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f9398f680b6f52b02c6ebce03967d1a5e352089cafe6912a737d8ec3bfe640. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:22Z), 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/NLUW22000947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fe073c8468f62a3644c1d5c11db2b730332eeb380e61b5ce1e44d011411df3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLUW21900922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa684278029b2f402981be519edcf5d3a083297132ef7e6b54baeda2d87800295. 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/NLUW21900923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a9d45ea531b81b618de7fe56d13b90fa9be82f0049b44fdb7fd552d5b04728. 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/NLUW21900884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c3f554a811684e79ec64df3b2c61d132ae016551415acf6c97d5ed83ed3a44. 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/NLUW21900873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66a66a918098af64e1b22cd235d6c44522bb15178493e6377edef395d1b1c43. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLUW21900874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce6ba2cdade36e8d69812d5b86989fb69b8fef75c66acec3a1eb8b9f9c3916f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLUW21900805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665533cb9c64c0e65ec9aa9a18439978609371d8f086be98a41d467d01e338c8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLUW21800729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b3afa0b4d6125e384830fd90f77a1c39a47e4784438f4778456f8717163cb0. 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/TCADN1880962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8268b8ee3111ade76457cb24fc87d206002581e1577a89affefc0bb9dfb32cec. 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/NLF711710043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab29fd537672697be3fcf621d8647eb1ecd136776572f0a8ad8702188f51fccd. 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/TCADA1715458.