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 0x24fe48ef45e618858d242cdcf615072a9ba38d997900307d04251a24e1b32ce8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2f452d6-5e5c-4c6a-967d-505457c2850d.json and https://artists.proofprofile.net/proofs/artist/b2f452d6-5e5c-4c6a-967d-505457c2850d.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 0xe4207f82ab62e9810ff9e33ed7efd5d162fa0c2ba0e1d504d38ed7cc0c745a9b. 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/ABLB10900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420aef3a2bd13641ed6a03ead662756fa505796e7be3701b5032aed0d5477a0c. 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/NLW2R1711596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251b9ef773f6b0adb8a81f0013d4c4b46921530fa663e977c73d17b275e27ffc. 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/NLW2R1711502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b62dab20e10dc5e81d170277bd3d5e7c61bdff0f91b7f2491615b2fc076bf4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLW2R1709672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d312c62ee66391b1b6caad064e4b3757a8aaf7b419526eb49c4b27c2190fded. 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/NLLB10900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1897095a6588389863e6e273c07e65483ae67f6057c0e521e15208a16126ea. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:12Z), 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/NLV3Q1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685fc907ca3140d3973e9e7564a93f12f57cc14a32d28c235f6299a95201efd1. 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/NLV3Q1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cf64ecfd7e70811b2a66f8b1572b708b4d629111ac3da76812dc22fdc1fde9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLV3Q1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba217e6b872c61c77d7260bad9463765c76772c3d68f462eae63aff197f15bf1. 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/NLV3Q1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258eb254136271407eb720e7a6e4ad020b7f51e2e3232e4a4f9d3b86f71b5c34. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NLV3Q1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c1dfd1eb8a9d2adb5a39552e54b1dc3aa24ffaf8dc85748fe0e407610967c. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:40:42Z), 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/NLV3Q1700019.