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 0x420276f379aa21d3b21a1625044508a56c8f99695566d79d624e38b7633059b7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41696584-af4f-43c4-af3a-233cdc5c32ae.json and https://artists.proofprofile.net/proofs/artist/41696584-af4f-43c4-af3a-233cdc5c32ae.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 0x0c4dc047abb61192a6cec9e21d62dbbf4c8c62d374254a27143aa1ae1781adea. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/AUGBT2351062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f0cf270bff982feb71aeb29bbd6cb8f6daf37bdd5f9c69fd016c571d70042f. 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/AUGBT2351063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88188c8d787f718bda59d9d6424e0c790d4aab69a63e033a7d189373f141bbac. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/AUGBT2351066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2f6fec3dd97a548667aeb3154b46a7db68f37d73816426cf0d17d6c57f68f6. 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/AUGBT2351071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec03255bfd00af342fb0523918032463a896af53425fec9f7374458f019dfbe3. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/AUGBT2351072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80846cbe02f1b71b014bc04612d7e38be9c3cab1df2232cf35d69ad74ca1cc6e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/AUMEV2400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e21a1a5a756ca06635c287e4ead86f3ed895414aa75c743e1c76c217f0316. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/AUMEV2400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80d609ca246595cd53c15974e41b8bb99de057fd1447d317eba006c4026ab03. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUMEV2400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd160a7e91f391bee05c5125a45b70ad98054b8b3ddba471293c9934698dd8a38. 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/AUMEV2400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bad121fcd600b7a301fb62f61beb0464500e0216a4a61c025439e705200a9c. 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/AUMEV2400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e491252bfdc275070507953970aa225b01084adad8d4b1f620f588dea5913f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:21Z), 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/AUMEV2400334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d6ff1935d89190e2b9f4553d698f01963ea6364442a05701aaa7d773ed5d16. 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/AUMEV2400336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc6c3320ef13de154a2eaaf0f491c01d8db69a56560eeabeb3bf9aec5b61c5e. 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/AUMEV2440937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa745ece6b4f883770346c68c375d060408c68e6434726ba2097dadd163418d19. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/AUMEV2474041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5210c932ac03bc1d5c77d9b0e456dab8be358ad56ae62dfba8c4686dc106f471. 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/AUGBT2479781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99716c972ee5a177b4255a16e42309ee223cb3c6474f50cd96c0264d8c3df18f. 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/AUMEV2517719.