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 0x944123e5056abc015c9bd913bf0ceb714e493d8757e5eaa1daaf6a746362d60e. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a42fee38-5079-4822-aa8f-ebdc3dca12e4.json and https://artists.proofprofile.net/proofs/artist/a42fee38-5079-4822-aa8f-ebdc3dca12e4.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 0x178d918fd94f378879859cd046cd16e1a2b056155e92a9ee0aab28e84a546c51. 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/ZA4XB1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2ec92450b67803e85f5d2262cab2d811b51ecbe6f5b3a96815c6dac9170d74. 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/QZRP52329597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd6f51201273dbd7457b3abe93fa7aec850f65bc6b38fd4e56c09f0185456e8. 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/QZDA52419059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcafbd70f72aae0ae8400d76c9285e3db2e5ce4c9b9cf3482aacd0f41125595. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTAZ2392824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cfef7c876a3d3a3e50f768ce5731bd4cf67e169d639c713eb2291082e078bb. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/GBLFP2534082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7f8d005bc9c294b60433298265074ba4ec4b4be9e09065b72b318aaae1fe7d. 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/GBLFP2534083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032cd60592f2caf5f33e85fe6c8d2a082e9b214b8ea9678cc8bf6eae4ad952a4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBLFP2534084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce1c816835b2882a1d747025f376f8f9eb4abcef6edb047e898c225d2ecb74a. 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/GBLFP2534085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307db0bdcf997261daca80a5ecb4dde3edb71def17286d1b7b060d8b4bd75abe. 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/GBLFP2534086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c202be274472a878aa446966b61bbc71b168675356eee3547c535e1df834179. 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/GBLFP2534087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d7c1de419b0e323e7546e75bc6786a6f618f786d5c72bf9a2c8bd876e53e46. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBLFP2534089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e2b8e6209e1ecc4421201322e2a421b99c1a05a7b1c2a3a973340401d5e042. 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/GBLFP2534090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9de46fe55b94636bc86e75720857c51a84f6facc91ed9510830c05db37afdf4. 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/GBLFP2534091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1caf0f877061755ad6c2e4482c06da385ed52311dd458b18b7ab8006389afe. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBLFP2534093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb902d0fca92735bea6e8c26170753cc4d55112b924d289c0f8c00bf5a09daae. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ZA4XB1800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593eedf6d9fbcd83dcf238f3b47bf0cbffc7206f383407c530f190a9650991d7. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ZA4XB1800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e91d15287ff50ac637c8ed5605be9bd769cc0c1642ad0b6968ae901a4361b11. 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/ZA4XB1800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0326eaddf4f5937bf12925c187b4a2920d753d93829cc0a9deea9b9a67fc49e. 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/ZA4XB1800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2627e8ebdc5ced2c2fcaf2c35186c36e5d0a9761f46ba13b27da73fdce71bcaa. 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/ZA4XB1800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f4635244f635ada41ddd0f191848cc2262de38181dc01aecb0b5ed1150ed73. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ZA4XB1800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf6c7b0b873e661595295dc8826d85cf3fdd4f6df3ce72944f936a41423b48b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBLFP2569528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec65a2b86d925b248aa64b9c1d1684832aad8b634857a9146d27910afb649d9e. 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/GBLFP2569529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5781ef81f577598adeb26b71e0d8d9ea0571d5edc6ffec6389852d760c96e5ba. 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/GBLFP2569530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd804c4c41e9722372a9245dd2464f29f94b7743486a7e29dc52883e922d9dba7. 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/GBLFP2569531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eff52d12d93f1effc88e973556741db2f5a9b297f0582b62e10f3a4be8bd66. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBLFP2569532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe347ce93e07ae2c0beb3fa107e889fc56c459f31eca3baf4871f3dc295cf5e1. 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/GBLFP2569533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ef7b4b0685047ee26d6a8862c7d0aae30b1ad361441ab6d89d5d790e89e1f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBLFP2569534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eaa1fb926f83a17865dcecd0100f49dfd97157ba76e3f92cc4590f5d903e1c. 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/GBLFP2569536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165b713b544e9118a86203f0d0df838c540f060e95f1ac60afbffd62ec45ee95. 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/GBLFP2569537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eec1756e253123baf4f732532470be3807ab1cb532d6978fce98e3402bbbc32. 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/GBLFP2569538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1791144e742fffdd5dd000a00c1ab2ef78f329d372cfa39f0785fbd51ad562f5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBLFP2569539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5d86c645e959ce459d13c60ce244272749c4e80759ddf579dd29cb9f3510d0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLFP2569540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b7472c2141fae231911b60f73d12ec71b741f048d247d44963cd2146003f8e. 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/GBLFP2569541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf989d8bb44c6b2b7ab954da02f0e47beaf35b1aef49fefc5eeab7a95eadfecc3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBLFP2569542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51e5c5aebe7ee86a725af3ec28f07d913cc3450c4c6cc28b17206cc64e24b92. 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/GBLFP2569543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5699a8c7535f132887f10415d86f04079d44327c9dca7b3b0034914e839ab7. 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/GBLFP2569545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08014ae1d26f136a2e9fdc7accf6c4601b442b720af34d03a4d3da3bcf7f2348. 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/GBLFP2569546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1106fc32cf09191eb8a9826b35a2c48b174563c3e1fad6efc08d10b37a40cdc. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/ZA4XB1800068.