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 0x7dc4ebf164a525fafc73e48c9ba8593ab6d7a33653a3a989096610c33ad5c854. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0b9b929-54de-4857-abc8-638f140c2929.json and https://artists.proofprofile.net/proofs/artist/b0b9b929-54de-4857-abc8-638f140c2929.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 0x41e214b3052aabd38b95d37cee0f6b561103cc8f91b3ee54072e995a9c6208ce. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/GX3Q92523917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9bc6516199a565d4359d4a506d021e98e865b31cf286e78a368b550c955c13. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX3Q92523918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c8b0cef3b39337ee69371bf0a632cd88e378efce85328cdea674b40d702052. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX3Q92523919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66400f0abbb3cc1b823cf78ce8238254850ff8336116f22303cf3a5b51ac483d. 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/GX3Q92523920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ad82eb966907bc67c71a28f6f7678f38383b4f2a3458a3e2bbcbb5c229532f. 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/GX3Q92523921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee3274e5590d783bfb0e58ff09162708612d59f30c1921fb48d8ed063077848. 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/GX3Q92523922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0168ff50adb9005e67acff48eafdc047341c384edaf21c844341beecee04429b. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/GX3Q92523923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684be78caa57993e48d8792dac7d59b9c3d1b41e70410908d05c5e7a71ebb19a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GX3Q92523924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26191854b618e46182bcf4a6d521e0e8d90aef42d41473cc2ad33fe6081688d9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:11:16Z), 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/GX3Q92523925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9227d94cbfe8b4f0828ad78e01a95fb74ea0862157931fea16c385931b143. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92523926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b0e494fc8d362a80a35f5215f995a57c016f2f4de7be3552f7e397ec7f9d12. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:51Z), 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/GX3Q92523928.