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 0xebc921c9a1e659d9d0e1597048e3f5bd57f327a5eb3eaf5e440ba7495b8c6210. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca1b1110-34bc-4874-9575-f8a371211ac3.json and https://artists.proofprofile.net/proofs/artist/ca1b1110-34bc-4874-9575-f8a371211ac3.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 0x4bf4b548d0fe601b6b1a298b37106c9db36d2e70a715c3367423404dfbd41ca2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USY242414791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873f6aec52bb59831c5c3dfacfad32a6c9eec114cc531543c538c59ae558bb4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USY242414792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70d5c26c0d90bccb62844a79cb825945e790993b696b85f19d99efa904657f1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USY242414793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09e073b94f889cc058e16edf7a77e34ecaf9abeecc7f0eba3b5d39a66e7fe33. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:53Z), 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/USY242414794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb52b35b00ebf337167f343e33e1bf4de854fa69b00f96fd1c505d26ad54a38. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:53:23Z), 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/USY242414795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7655189d24821f444937facd7959815feb030e89c073c76b472f662b9c63d9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USY242414796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4370c2dde1933ff999bb6c778fb8a714bd8c25a1e89127bda604b27b6e5e4c9c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USY242414797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c70121eb8748abe1056a1f7e879d511eae76a14e997e300c3b47b37c6f48ceb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USY242414798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688f7a66862aafecbf7aeff11e5516384124240985bdd46c3a11485423244b5d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USY242414799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832a8cb7e9c54450371e602a75f43dc35b499c9a4724980882498888cec09c67. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:54Z), 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/USY242414800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046e81544e65a950d30a078c075d36529b19b2d81686d3063cbf508881c82f7d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH2526240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3d6625a12d258cba133407cf4f04a9878fe42ed4fcfb750d12e247e443bdb3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH2526241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1096c0818a8a89bbd28a64aebe7757d646ef118ee1e6eee22a4fe31cc9d2d9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH2526242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e083676cf92cfa2cbefb092c6f65ec0f455569b5b1745e3a0f64bd7a864f4fd. 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/USCGH2526243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f46b14cf64fe5356238cf6bffc02587cf14846879df71369a5c6442363faf6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH2526244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc468594cff9372294c63dfec7091b36ddc4018bba9e7b4d92b8ff1aa5862203. 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/USCGH2526245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be8f4b3e7f5aa753366ed1912228a140c9bd1070aa358d4f8e926fc4f8ab3a3. 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/USCGH2526246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99346b053efe6b62f8636196c546816019b41b5bdb12956f5c3f441c0d26c7f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH2526247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8bece70dfbc04012a2523946841847c6f53ebbe1ebcc4a5e85a0a2b47ffa1e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:06:06Z), 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/USCGH2526248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe470fb144f308f1f1ff823ff25dc03c265b4bfd2ce0a6fc9da3d599a6470c41a. 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/USCGH2526249.