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 0xe56868a3e2295a7180ec4e76fdb6ee10f9be112ca7b3cfafd743e6edad25b0ee. 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/8ddbcdb2-f246-4158-81a5-7eee8d111110.json and https://artists.proofprofile.net/proofs/artist/8ddbcdb2-f246-4158-81a5-7eee8d111110.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 0xc9b54b518b074d05a1fc7b6690ff6c73f933bd8b7f621bd107ddff38eba6b727. 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/QZES72344976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3262093d170621c23899e3baffa1d10c55f537bf76f3ec6b2b027749e48cc1f. 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/QZDA82495916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7b8eab0961fabdeb2070ab9d208fe111867fc590c389e719d9ac5d8a2d4265. 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/TCAIO2436992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d32a0b3134c83639ae98faa413499de7752c4c1efc75203334ae9026fd61882. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHN2394906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca37d4d85a95f44dac08cfd82347f4efc59063b63ac6fb412168f6f13c4ccf7. 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/QZK6Q2082303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ada66e4b2df928d9a82aba8baa22a294f7ca729b1db5cabb6306e8e0a17790. 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/QZK6Q2082306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cdd1d53acc5b8318605cd2dea35d31ae349016ad21003e6e1d940464a15e33. 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/QZK6Q2082313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea1a3169159f21e5b05c11222d84486958397ccace16f0aa9fbb5591e2b7abd. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKQJK2410902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c7f065a7f0053296040eaa4004ec20af90fc0a6fd79cb914e96c55777e2153. 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/UKQJK2410901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0f7ead44d6aedcc99efd1e63b52261963b4f476ec5fc1c1aa8c43cd563c2bf. 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/QZZ792475728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c7f065a7f0053296040eaa4004ec20af90fc0a6fd79cb914e96c55777e2153. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKQJK2410901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cf174ee23be30dbd14239ae7f8af22724c0732bc1baf0bf108bf0f4bb68897. 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/UKQJK2410900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4398ead7a8e1334c31917add6372f203fd38235ce3d93d920152b923206929f0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCAIQ2496906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d740adf1afc2f74712d6ba34a1bc1b39461af47875c6a1bbf3cbb4a5ca2f95c. 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/TCAHZ2422478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd22646d53b1315d31f0f9145ba04ee13f9e0d63947068ec508e99e13f0a71e. 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/TCAHZ2473980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc533aea01e3084650f44bf2d7bda4d48a4a88ca750de198ec4dc389b31a548c3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHZ2422392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd89a5bd6f769b82257d9946f8d878434f47778dd94a2cd8bedaf501c46f3026. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/TCAHT2468872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab3bf6808d5c214c8fee96d1cd955b93fa579ad56402dad3405ba85584ca889. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAHT2310659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae08788ab3c885b4e6408a7831d270f804a3abea5427e8518c08a44032dced2. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCAHR2311082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd170f69efe182b5166ac7ee163b8a1fde40bc1873481bad8c763fe127af8b15e. 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/TCAHQ2392899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a5bc6e80427ed369171118ac3691de0aa89527b91f13111b0e5fc24a5a1ef9. 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/TCAHJ2323847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d756c69bb2763f60314c4cc35e73ec06fc93b5d700799cdb5308ff57890309. 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/TCAHC2320876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebb351c30ac662c02a0e8acad810dfef6f312360bb7f898177010c58cecca68. 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/TCAGM2292263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bb275fb7b4002a0b17283d0f4ac01d2227e503a96fcd2122768f42b0e8c975. 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/TCAGA2289478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5105d6a37313ad1d20dafa73b116daf0a13f219a4e1a654a9a5e38e4ec48ce0. 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/TCAFR2104489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1682ea30cb8151dff7c3b4b4135ac28a2f7b5c0f174c1acf228139fd831355c3. 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/TCAFL2129770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd6a64ecaaee30d24a684eba95278ef03f08a306c54ec3be7a10f1bb18154d1. 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/TCAFH2018754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79224254eb034f2478e41e017ca71c287b4900dab1ceb4decef0cc3664d7c8ef. 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/TCAEJ1991896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a04e1c593861857e5c533ba27e3eacbe332889a7dc1e463d55467c8dc4aca. 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/TCAFA2029741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf1d5df75168275bff8eca14d23f0e1ad5edbe2db0b338d5433a11764d10b2c. 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/TCAES2084632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9b9aa178dc3c08e4fba27ec7d8c935a5874370c42ce373034b142638255f18. 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/TCAES2005066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dde740aefbe1c8619163ce5807e39ebf2994062a543a3361aeac374d10c51f. 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/TCAEI1929704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676250ed9be6a3f112d2999e9e41cd33714eee4f1c1bcc4ebf7f9d2c7aea1e1a. 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/TCAEF1961334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655a3e363053efca17d10b1848ff4b98b612978972d7680983e5e8707c5fd100. 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/QZNWZ2284372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf787b33e4806ed37fba7e570603dfe81c3cd245a14db892f7a51e67b2714bf. 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/TCAIN2463131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02b2b30a41e7796551de6e1edf992cb14541ef4e4fb5825891cf90df3902a8c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZMER2306093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5735bf43ca94741d1741dd23cf865eb19ba4609b64d16fe70d02fe9460e07ac. 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/UKQJK2410903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea1a3169159f21e5b05c11222d84486958397ccace16f0aa9fbb5591e2b7abd. 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/UKQJK2410902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f0bd9fc7b098789b7b1b3c780105949a3a06ff35fe9c7db797239eddc5be1c. 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/TCAJO2553326.