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 0x18e7ac6a5d6a6e4de15660cddfc7f86f35dcb788c5c9cf36355610d583e6378e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4721cc2f-c0d4-4710-b8fc-ecadc801d565.json and https://artists.proofprofile.net/proofs/artist/4721cc2f-c0d4-4710-b8fc-ecadc801d565.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 0xca4108866d86fd877962ce4bba8a41e096060c19e94a9f23ce1518fd89fb5484. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92Q2412677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad5825c52d3ff47c8cb6fd0a7f6b755eb150ad51e225f970ed6aabb8793ef6d. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/CBEYJ2484264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5281c4baa29f7ecbb0cd383825cf7497581e240d5cd1fc78e029a0291036ed. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAHQJ2541013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba56ffb7a42e0dba56fd3c5e4f4d8fca190656a1f05e30b84eb1679b56bb233. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAHQJ2584813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303498ecdaab6fdcf26f1d4e7488879ec20897c22beb6c1758142123a6620bac. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAHQJ2592789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f55ec935768cf7a956b03356fd3b69936b34b47ea09086ebce2ca69660b10c4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAENV2510085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe06c26768b24face36a67aa84a2e04828f499779d35cfaee9ffdec721e89865. 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/CAGOO2505775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eaf1da71ac3b3bcde821a6e921e5190382cd4a0abdc9fa463e62a302a6809d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAGOO2585441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c2b831fc3246952eb14370c39dfb5683d1e03c2a06e0e438d33bf38f01de1b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CALVP2514957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ed4cf9e32437099590c9931fed7e672a55383bd438a96e91c3af30976cdff5. 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/CALVP2548439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdbbcfa25bc346c46d91db03cf84bc3629e4b95426bb8226497a0280520effd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/CBEYJ2513870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ecc31edd6712c19c62b363710e310a0acb06193e271129ddb5b62e76b4208f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CBEYJ2534882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59fcd94eff0d71e00c7e94e19ca07822a1a30ba23b7c29ed2fe10180091d61c. 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/CBEYJ2551258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0867c89e49136864e87acbf921a20a8c249d55767455956d3e6c92fc529593a1. 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/CBEYJ2594940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fab69c613f67140289674981ec8cf2dd60478db0e78cd1045969a5643dd4fd2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CBEYJ2571673.