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 0x7e879dbe4498d61a5cd4249f41eea187aa61163e5117f8d79547872262c40c4d. 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/5a6d24fb-3e9a-418d-b729-8e7fd6f9844d.json and https://artists.proofprofile.net/proofs/artist/5a6d24fb-3e9a-418d-b729-8e7fd6f9844d.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 0xd064af162557cd9297185182a28ffc6d99487ac7d152c285355bc787e8a51a18. 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/USDY42151909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8621edce76a5dddfcab0e01ebe0afcfb5928608ee3be558bdea3e5117638ad37. 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/USDY42151913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38f8fa62c20db869ab947e31c236419d576adcf0284bfdcde17ef95874595b7. 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/USDY42151915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca182503564968f1b7a1fd341cf7dfb811b1b90a01d369b7b26a5e66d8513188. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USDY42151910.
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 0x944231db384d3f79ffdc065f136da0939a3dffcadd26135b72356a46c4103935. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USDY42151911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fd96c49b02a6116ed357785e3075a1ebbb885279d03631767719ce2c07a569. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USDY42151912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a074f8569a0f274c3f094c0f30fbeb0ee9bd2bfa755cf26a771844d9cb1d1dc. 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/USDY42151914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b3456ab1042baf3bbac6841156875ab09cc2cd7a124b0b7a6d8946eeffe11f. 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/USDY42194058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03212bd04a37fc535673a735bea9ffe384a427d068678274a72093884de014a. 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/USDY42194060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b847f5f9bf99d3d6fe20e2b3bca8c1baff1c2363b415c2225c55d1fa1c896a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDY42194055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b335f1b308cc5476a97689283518a66b9bee5fe2f882e33441d147a206eae2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USDY42194056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eee48a1cc05e1dc1132feabfd622bcfab9eb822dcaa1e12db7621d27db84ce7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USDY42194061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513723635b540a8f8c8898ebe1398708d546736a13bdc208cc355a52b6b9cb12. 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/USDY42189295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8369db821105e51b7e26491fb6e4d1f6895c7f7059d5038b20ebbf4d25daa156. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USDY42189296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eccf22ab099d466b5dc017d165d931b1eaaa6aa2ae9737bcced00899818102. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USDY42189297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ce4eb9d8a0e9a1c4c7fa7b70005b6bd0be9dd38edbd669c4d0fcd5a0d49f7b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDY42189302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c133576fbda62a960a2b805105cb5e8a794d126e862b906dd6cceeeaf4a97b. 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/USHM22165894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d78655d614a2fac66b393209c90c40a0f9ac8bc94382630697ebfab382d9f2c. 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/USHM22165895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d04f69353d16d654a06d1843dc5e7ee9157957dc18790cc89233adcdeecae50. 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/USHM22165900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b2827ff1d40da02b3069a5c66ee575553e1a42ca406a4f7824bb7cdd580949. 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/USHM22165897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079f9942a97c8d79e2ac9bb64f2057652f87e2562189648f0701cf4a122e1983. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM22165899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea328f6717816bce8bb341dbf856fb01a7eec788c8563d107a6c8d604a2ef9ab. 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/USDHM1509292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8030ef8a7d616db1d6298af8313836be5fa665104f5adafc0dab2a87455f0a. 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/USDHM1509293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5bf7730228ae8702489627b2ce666d878d2487da8f86a3af112b0d1f6f0038. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1509294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1306fbc522888623bea2527951ea5d7cc838bd6d123e6c7828a3435512ce8aae. 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/USDHM1509295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ffee587482e90c2cb0ecff5246edb35cf20d17a0b6dedafd2686740f18ff7a. 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/USDHM1509296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4037a7db9dc9c83bb693539756e44acef2f717ba12ef15558df0c767c857d6c5. 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/USDHM1509297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125b76f2c327ffd647f96d4238070202996faaedab1b1e191aa35ca3d3c75720. 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/USDHM1509298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9ab2e8b1da32754929f499fc8f96b2323ad66fc932ebbdb31553ad906f7cb9. 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/USDHM1509299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de6bbafa8ea37d4d4591ce606afd3e6b754ded99b0cf83c8bbd62738ca071b7. 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/USDHM1509300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7532b7eb62def02ab2b610b43f7e81b72120e18c873b75866373ac0c67a895e. 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/USDHM1509301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240d96f3a204cf9184247c6945193488b65ab36012ff5972c8206b349df68b40. 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/USDHM1509302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c48f907eeaef31e7ae8d0c0665b0cd0a46536fa1b19a0091a37c31e806d09a. 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/TCAEP2022242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dd08b21d0a0d021bca05ad0f702213a5caf164884863b7d41604c65daac60b. 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/TCAEN1902536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fa707d38639955e7296b5aaff06157b2b51f7855c37c73457c957f86d64d7b. 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/TCACY1776572.