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 0x4152444eaa69716d7ee92a95420e132a8814db1638fe8f3eb28b65d95ee7c0a9. 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/c94331b3-6dc9-4663-aac8-256e18d209c8.json and https://artists.proofprofile.net/proofs/artist/c94331b3-6dc9-4663-aac8-256e18d209c8.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 0xbbf39c4f92dc345c9924f408da4d95963a76ee93338f327e499ed91f6f028974. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZS662197022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ae1c6c9a6783a7727d818199961853dc9b2d2934b4e0b4f62124173177360e. 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/QZS672134046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1975ce4ad1e5f9b9c983e5c441d1ddc6e7a58ef9bb0bbe596f55d5f4ecb0f263. 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/QZS652154051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8440f8213b87b247c79375ea71ab08c9a19eb739801bc0251ac1d331b81e3. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZS662134308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc086aa027b97f5c3c6d2ac3e0f3c1e98397fdd4351da7e20d90e2cfbd7b692fc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:38:35Z), 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/QZS632114262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68075cf1deb8da97ce433c149057dc07c367b6311351db8e8b8db3367fda66d4. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZS672103673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef3573e672b734892502b1d63003f9c8e0c89e10dd15ffdb45829e6d84a54c1. 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/QZS662186854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31864540d189bd95c776030b09b4a72813e4cb5409b3748f8f56c0937ebd327. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZS672193340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea314c1281e1205b0cca351e226741a35c641c02f34706ee319bba409e26a9. 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/QZS662176050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d446076682e87287ee1c2be405f4f26b8034e87a88461090ea9ee09212de40. 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/QZS672193191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f803485f13b996cd8e770ad6d782107cbe7b251207a1a69b9015ec67957c1a. 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/QZS642101570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529d27fb8aaf1dd30bdac0017e5483fb76eae2a24afc3bbc63b6f0c64aab67a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS652108649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8408ae4f88922261873a569f60abc36a085fa516ae3cea8df2d1582ce960da. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:39Z), 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/QZS662136917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebd5d22d915f6f95b103caba8d82965d8b973973cffc0eb4b4968cca269b80a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS672156414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142ea1527cbce52ea9dd5a9801e98d0e122e99ac886e25e6edb9c54908f3b88b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZS662115221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fde9eeb3ce67633eb75d8675f1ff77f26686a7233617d61c07658a4d20e1e2e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZS672132516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de3caad10caa183f4e4e4b81d774de5e4d36dc5bbf2aeb6d77c0ced1c2baff2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:46:17Z), 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/QZS652125962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167e29f2464195fc56904b91edcc277a9f1e969b9fafd16afb7f8ea3adf4cd14. 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/QZS632140936.