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 0x56b7877fc0afe0fc9c1f2b115d89ed53bf180b2935c80163e94ed793c457c6bb. 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/c42bcd54-d12b-4e07-8357-17773d30bb68.json and https://artists.proofprofile.net/proofs/artist/c42bcd54-d12b-4e07-8357-17773d30bb68.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 0x6213726c8b917f99840c18cbf3de5880f6ce8c785006e771f85e1d9e6fe88cd2. 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/QMFME2053106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6cd4b47066f4998cd9b4fd1ad8c2fbce97deabbb14579d5906e965616f0b59. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM4TW2195386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc517252f96a59dce98e843b5fb657269c35527bc6aa9edbb8b2e7a19ea942393. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ92118028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec55e3f82dd72662297261024a070d3144ab8bb6f313e716e8a2ed87cfe48f6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM4TW2296366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d310b46d008e57254e57caff14f1f12fa0a4c8dbcb27a5a45363134ebfb25b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHZ32238833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cfa24d132f7ded01e1855abb1b407f05cfa4d275876941219a6e399a1281e6. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:20:48Z), 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/QZL5N2435285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b734392ca5d58f0c9858fea1b4b6798abafaccd10645047e415d666c4ebf846. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZL5N2434250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5148491a6578c1fef7f0c0476c8f1e5466b1d37374ae14e0f47515932898404. 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/QZL5N2435288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d73ce47f2ebfafe3d5acd79f1e8f4eb9a0757690b71dc326394b0ee9a3906d0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZL5N2435291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b64950f5a844be8d4f58af8a7d0f499bc4d2af340ba94ad2ac9e940ff830f4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:38Z), 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/QZL5N2436868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777c8fa1e255165ab27af9b276da4578a95831feaf1b52139aa21ca44f7c5f10. 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/QZL5N2441726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176e37c265919459697b44446f1fec587088030eaf389afe69f3db6185832198. 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/QZL5N2443557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3302d5a158f7f73cd240c061d963e14c831c00bbd8eba43aa72f513f88ca3a94. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZL5N2445235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f810aec22c1fea37693f219149c5879b88481f6519849bdc187665988d7d94. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZL5N2446899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c136fcf662a820e497bdad45d8bc608495ebd3589e7f6fc05edc4dbb625dbe. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZL5N2451761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ebbb7742a5de04648e5229f51af632ea72f5e62bbec009e206957edb66babd. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZL5N2558984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2479a9bc614ec63a4b7e5d78ccdac291cf103337ca9edebdf76f35987ea13f85. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZL5N2562717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a3ede791ae6254f75d7541da816a8dc7e496edef588b1532d2ee4a3f8cd74c. 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/QZL5N2562719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a72dab2387895d43b59d1fc1f994d7ff4df83828184803283b0b2ee9e704b9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:33:01Z), 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/QZL5N2562720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58470c538d170668796a9502f8fd619fcb5a140e5f27a08c83b86fc0c95aae3f. 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/QZL5N2562721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017578e310e39162cd1683aaade8906ba9d75776823757cd54b9d345a9486bf0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZL5N2562722.