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 0x2ac9260ef4dadb5bd1888d276677dd1e8f169712d0ef31030806b81c11c11d25. 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/8bac6575-9404-4ae6-a3ba-752150875b2b.json and https://artists.proofprofile.net/proofs/artist/8bac6575-9404-4ae6-a3ba-752150875b2b.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 0x73326223ff75002d70911298331e26218881bcb5e62564a9908e45644eebbbe6. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USCGJ1592073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7038433588d90b17b4c00ef6c6a1f36c65563b08bef958e2b63888c2a8ec0bb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ1592074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d4a01c2418231a2dc4d5238d19d579296dab6d06adc70e756b721b3dec9ba3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:06Z), 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/USCGJ1592072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73326223ff75002d70911298331e26218881bcb5e62564a9908e45644eebbbe6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USCGJ1592073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7038433588d90b17b4c00ef6c6a1f36c65563b08bef958e2b63888c2a8ec0bb. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCGJ1592074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a35e639d1bee9af67dcade8bc42b13dd314e4a3980e75cf550a04e047d9ae4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:41Z), 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/ES71G1845569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572c1e6d8232d4fc460e8041f9e1ea77afe07febe6f02860dce2ca069d5fa98b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:31Z), 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/ES71G1844723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93027c8d5a14692f5f69558234dd9130645b5ff30c3ad3d084ef9256d4bd8eb9. 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/ES71G1845573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0e536d2147089f6b9aae998dea66cb9e96d62b2aae65b9e4478d4a93ada06. 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/ES71G1842271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6015c8d1e45675a0ae938e958803319bdfd7b4f48b256bf1cf721881fa5417. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES71G2020088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70ce8b9fdadbb0f958d8a38da07ab0ff5c5f85445c7024c902b7565a6789a84. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G2123218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03803052c25eb293e79ef88ca9fa6e6b2006be9a41e7cac17cd729d7cc76011c. 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/ES71G2211281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b103696877d53d26def8106218f36059a5e6bbd7e01debcee529c7cabbc67. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:40Z), 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/ES71G2315244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ab7257a34ac16725ce2f7a866c1a2b23b564fb95d095b64ffd9eef92a7735. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:13:58Z), 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/ES71G2319205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385bd575067ab2d33ba4e07c4664d6eaaf83b9207804342e9769a8c3b8942c4b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ES71G2327576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3a14aa08ebb484600cee79fcd8b9b8120b326d7be99bcf74c1ad3962a7e182. 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/ES71G2311294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385bd575067ab2d33ba4e07c4664d6eaaf83b9207804342e9769a8c3b8942c4b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:00Z), 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/ES71G2327576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0487f54545b570f83e24bea5c0ca09ba393de203ca4913178f2338b3067119. Chain 2 (Bitcoin): anchored in block 958556 (2026-07-18T13:21:06Z), 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/ES71G2332272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b9b5a061e630bcfc2db26200c6a10fd6d400a39b892cd3516d3b3e5caeee57. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G2324043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0bcd455bdde93546b690e559eab68e5bc12f6103c200db3fcb3c604ac390e5. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ES71G2332273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b103696877d53d26def8106218f36059a5e6bbd7e01debcee529c7cabbc67. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G2315244.