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 0x10f8a76b0c0ca80ca7c873ea2a97cd74944f8df1cf5c9052e9011759649fae93. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c6e01cb-7df4-4064-a3d0-b76474155e4c.json and https://artists.proofprofile.net/proofs/artist/2c6e01cb-7df4-4064-a3d0-b76474155e4c.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 0xcbfc41e3074ab4e97f31870319d03161b877189c6b3602915da3c7eb013e62df. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFT2521331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c0f91fc00484560a8166316aa67b0892fa8db7c2257d72e33fc664ca687abb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFT2521335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003d92d22c3be6b0df03e5db9419062c07a4d0b1832a4f3ccfb434cb5dbc3dca. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFT2521336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8660b920ea1ddb5dddcac5f9f7d02d1d06062bec8cd1b19988d5f6fa3db551. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7Q2550039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faee135ec54592b83a34f9eda06baa651201dfe6af8531f0cccbc2e864824a5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7Q2550040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0676d2f439c243292757ab4a56e278e32b5ffb7996b6b026f742c601b7c48286. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7Q2550041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a57fb55a8bbb4a0ed9a0d826800c535ffe52b14a484a123d4aab95884c0fc86. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7Q2550042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30d703d855f097fcb7403af61f37791e9ed9348d49378378a37c47aa7990701. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7Q2550043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f543f7f392f0a98f21a3d31f2a2cabbb4f58cf5318bce6648b65f596aa8b14. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7Q2550044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce068dbdf3ccc4ca47c243187076833e623d001b653c9dee3f36f26de667ca4a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7Q2550045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2455c39336fb5a2443ebf1f33addc3c7ede4c4667d1562c46e228840d94607. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7Q2550046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985cf3386099321232e1189db8a77be2ac5fa1cbe018d78ee3da689ad991643d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7Q2550047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1548c6de9839434b074c0414bb0c8508460e48b8157c9eda9aab84b9961cf949. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7Q2550048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f52157d5033d9261be0882cc9a859b0a45924c44327ccd3f3639026b2fe2583. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7Q2550049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9329501429864b5f0ed76ba23e2814d0c0e28a6105fccd17c19b48858c5f49. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7Q2550050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d177e667a22a8b6867b90450a9a6515f378cb782a385f936ab9540625d3a3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7Q2550051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71297aec7fb7a0b4c53a2584f8a161161ebaf130267ec327890f702e91a0492. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7Q2550052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d49873b7acf64965e3eb2f73393223e8df1a365c15364d894d35f6a5a0edd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7P2584020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5366eebdf8d9afb9e647c1c8d5ab9c878ce0e39385476dc5cceace81016a3e44. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7P2584021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8188bca05606405ffedc34fa38709e6e50c1a8d311a0e60ae26204da76a1b035. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7P2584022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c58b63e097046a88fe4f999921b4b511d362c1fa1647672858ab684be8d9e4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7P2584023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ecf4494bafa9b224a39b2f8f22ee7914ed1adc7888bf02101025a5ceadb36c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7P2584024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e8ce3bebabf3bb5b2020ffc898da10e65c70b2fd3b132ac277bc324db7ee49. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7P2584025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5b866cca45fce896d5a833c893ceb3f6003ded1c20d7a69c543f4d2917284e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7P2584026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44938432bfe77511cfb547a6148b8fdd711b185dca855a9173661092fce6f6e9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7P2584027.