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 0x9f7b56cf93477546dcca368d768a0f8214e9fefc83ab251ceedce5fe9dac542d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10ec9ca0-7314-4b40-8ad1-ea0202702f5a.json and https://artists.proofprofile.net/proofs/artist/10ec9ca0-7314-4b40-8ad1-ea0202702f5a.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 0x2c9007f17cb53762168b318220c1552b2a66e3443936dd26cb43a2f437be2218. 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/NLCK42211004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379ca5382deed136e3f91158fd165c749e969918bd47f5336d446c071b91af22. 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/NLCK42211005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978c19d00828df3549b17cceda27bef947960d1f03e143d0e26af3186a57449b. 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/NLCK42235632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb8bbe0e630982580f42b17f37cf8d0a099d0b1c25a1bd28e7769f0c5e4684c. 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/NLCK42235633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd776b0c891202593189058b4f30d820ab199823c93165f12f828564413d4a760. 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/NLCK42340543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e040e8db2d7c8489949f719fee8e8c08d35129f80343db3e82a17e84da0010. 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/NLCK42235635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a1ec6620065dfb29075ead36daefbfe42d8889fea9490691be983214bc787a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NLCK42235638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b96d5ca123f673f0f6a44bdffcea092831db3af25b11e04afcb51af292fab3e. 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/NLCK42403839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc100e6b34171217b34bc2e147e69b5e67db7f02ae3e39caaff927fc49f206b1b. 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/NLCK42340832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51dffd9923064cac2cccc9d88d9b1a8fd24b9fabc2b00b2ddf83aa5273edcd2. 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/NLCK42340834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd776b0c891202593189058b4f30d820ab199823c93165f12f828564413d4a760. 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/NLCK42340543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e617fec7f41a08fba42a76bc08270b4369ded08f8044b26cbb6900d5188913d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLCK42233086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf04f25e4da622346eaff7929712b26cb999939f23e7b294df3c668b5fb9e593. 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/NLCK42233088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b99798bf421c19fe969c3596e05d1f1d1897eed39bfbd54590ca48f405083c. 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/NLCK42228697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd57de7371af5f9bffbfebc537066f9f55e02ef4abd70bf0f7639af57610c7e5. 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/NLCK42228698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41cabcc4ec0805101052b2be15789aaccfdd0c4b80e5bb27c9374f5bfb07a31. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLCK42228699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4fe33dd7caf7d4fea3bd700e54a97b88cc3248e2563422165dfce70b77b6a1. 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/NLCK42228082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184c2e9dd59cf1793ac552ac29e36a2032277d5be57638a1a8735883ba1a53e3. 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/NLCK42228084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a07e14e0e9f11bb6f9e0ef05e27be928054c796d34ad30aae42394db739974. 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/NLCK42215675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf497392ffde3e260becfa09e62cd76311cb70fe930642abbcdf062ee37963bf7. 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/NLCK42215676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cb1393d4f9d8ac7e24a47f53e2fee74b21dced8e68ad81217a25d45c4112e5. 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/UKNBR2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e79afe1359f1becfc83b54b6979a307ffacf2e59ff09e58a37ca81ae9a711f. 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/NLCK42210968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508b4f22815706474c87da019567304e861cb47e005d4f2cb687ced408556d7c. 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/NLCK42211597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e79afe1359f1becfc83b54b6979a307ffacf2e59ff09e58a37ca81ae9a711f. 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/NLCK42210968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508b4f22815706474c87da019567304e861cb47e005d4f2cb687ced408556d7c. 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/NLCK42211597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9007f17cb53762168b318220c1552b2a66e3443936dd26cb43a2f437be2218. 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/NLCK42211004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b778090d4868d64f6ee1729fe07c662427b9961effa47defec450881f23101. 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/NLCK41096916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55097ada6a2ba3948d91053a67e739eb912e521bca048b58b41f3d40a6921e0. 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/CA5KR0038693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b778090d4868d64f6ee1729fe07c662427b9961effa47defec450881f23101. 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/NLCK41096916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a29e50b62177e73eaf2e8a2451efda66c2f817509ac76102728679f9eac436. 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/NLCK41089890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35095330a3fd77f0c98f27ef2094d5e4564fb1790a503d94316f3b4476d7b53e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLCK41079342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7a64b734ac87248f0d95f5b45b5f08876fab69c88fd84da54cd7669cef9e5d. 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/NLCK41079343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81e8fe786d2a97a8dc80eefa8175f4cc75e84a69033af1326a5e595883acf90. 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/NLCK41079345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae9e4572a2b35403c39f2cc85fe7b7396a9c561b5b16334514b789bc392a2cf. 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/NLCK41078225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00572f4fdf1c8cef19a9efa9780b6b8d5d6885583a0eedd685d3a203389e590b. 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/NLCK41071673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649127fd446dbcf73e215f0d353b8832c581f4bf64bf9f15e02305e96f5689aa. 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/NLCK41071674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03183c38fd5a63429ef7c1f95143b15e4aaef6958cda96ccae83c4e029c5ba4. 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/NLCK42405927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b9b6bf3ab6e92af7cebe3967192d21a97cf131f9951609dc53e21c280b5125. 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/NLCK42405929.