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 0xe7b1daa9bb56c851d828bedfb905c8a9dd4bcec3c25285452dd1ff7fcd9d2622. 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/7236221b-76ad-46b3-94df-21a135faba53.json and https://artists.proofprofile.net/proofs/artist/7236221b-76ad-46b3-94df-21a135faba53.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 0xe45eae2ae9e1fcc8c839899fae8c491ba6d833f273c205cf49f512946c8ccc3c. 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/TCACT1608233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9adc4b970530f024581e48e242d782483259dbf5b315804e5f4d56023ce8ba. 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/TCADA1767217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e95fcb884265185a580153c5300fee1ece5443cd3daae732475ec16c47ff8f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:20Z), 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/TCADQ1842570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b70dacc56b65d441c8e77adff1aa153eeb467e473e4a55ec300858d0abc88c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAEG1991340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee61633f0c8755b4a94bd45646e906ce24b9769e61ab3bf8872937c73554fad. 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/TCAEG1991343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb283d0a22e6e6b759efc14702d82b94357c0ed86257cd99bd9a273cdee61c8df. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAEG1991842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f66bb5b5dbbaa7422dd1bb2853138366a4a13aa729718acd4b24587af9634f. 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/TCAEH1988714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b976b7a16920a5666f2b6dffb110b1e2063824d534b17695874af050aeed3f. 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/GBWUL1933653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41ffdc816b28203122727e694e0d1bc1261ea75de72c609de5d1710cafc477a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBWUL1948372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24741e77f4040d40eaf1e6d5fbbba26243af598a9a87322360d931b0beb71a42. 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/GBWUL2024460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bee116987f4e6ff3250a737033fcd2a4098e5b57ab76b0da9387fb04eacae9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:37Z), 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/GBWUL2024482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f8769d1c1b9db5607b06c5b0eee7617878633f56582b65a840bc0558a762ad. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZ5FN2283116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5b56645651ef6fc0a000c27e98e2bc79cb614d560b89033989da818ceb2352. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ5FN2297039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea21f56f513c9c4ea171e1d32b300a73c95bd0a269b6caf4d92fa2e34e27952. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:52:32Z), 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/QZWDE2219310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e5b7881ae93fd31cefc330ad8a36dce54fd25b6597cd19ef234480818862ff. 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/GBWUL2414011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152d5e228cbcb14f75d2cc9a70d2e64f24fe32bbdcace95a8ea6f4dfaa7a7560. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:18:34Z), 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/GBWUL2414416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021e578973b17afc7606414a23e6ec0616b01311275dd6e21fa643b7f93d2d75. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTV32586036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f716a1706b0faabbc20fd1ec7019c91e92b40aac62f14356f4c5785c9757a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TW2443190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f716a1706b0faabbc20fd1ec7019c91e92b40aac62f14356f4c5785c9757a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM4TW2443190.