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 0x7a8675e50100f0de538eeb475d349641ff9366a5808d787532b389cebb400b60. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abaa31b6-596d-4f5d-ac1b-8072c3386562.json and https://artists.proofprofile.net/proofs/artist/abaa31b6-596d-4f5d-ac1b-8072c3386562.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 0xa34f0808b280492b1ceb6be5229592bac1205ba502f7df86e0bb898dbaccc125. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:48:39Z), 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/QZK6F2254811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5847a7cde852119b1cdcacfafce228363c96133475f44d37938a457ad7f31d2c. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZMEP2294711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881533ed34ec2ccbaf46cdf0477f6023427e93a6fec66e5cdbadb8249a49d528. 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/QZTB22299772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc4e7ddfc3788bd4db8e89f889e943b0485eddb632b48084c08ffd118d006b7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTB62248857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65da15f2702f41cd1d1bbfa676c3c62d6ad7f73d2ff2c7e41f977b2ab9f8bc8. 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/QZTB72266627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc99b33adc5cc0dcc8fc39871f601dac0bb8edd390b4660e80fb82f1638cc81b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA62386334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c0606cf56c630087d44bd8f6afd7f2a3b4cc261d5c8db202c4380599f021b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN82331453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf43977a1baed70100721902a86c91bca841c07c90fa58082c80f2ecfa3fab2d. 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/QZHN92334377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d14ae1df5bcf1d08b828d132efe91753c9f9ea463bbbf6bc991dbcc5f1bb82e. 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/QZMEP2303125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd839ba4c634caadbe88c8be8a8f1af55f56e589de6e802848a234a7c6e21908. 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/QZPLS2315170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ba9d01241dac1290ad57335d60694bb616b4ca9df3f1a650415d013e68a011. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2353989.