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 0x32c4b7b0b8c656d28c322ca9c7e59fb12d2048b4447c06c1d3100aaf2653432a. 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/f1cc696d-4b93-4cc0-85f6-e11ed740d3d6.json and https://artists.proofprofile.net/proofs/artist/f1cc696d-4b93-4cc0-85f6-e11ed740d3d6.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 0x06356fe313f6c233b939e9141d1448d684b2123fb7f181a4e2fb8e5d88761af9. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:33:30Z), 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/QZHNA2460436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eef9cc84190ac7c2f08da47d50704ba460575702af15ceb155717a6d02b6631. 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/QZK6M2454697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9b31258e9718d226dbb4e79d035ce3496d437e3232f91e6a64605672f96890. 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/QZK6K2487524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c3946ffed381b82c9d130f5a58fe7bbadf140cfe0e5b3b1d672555de3c86a. 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/QZTAX2401414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370d3beddb4b629eeab08d5986a73d8de0239cd0cdca042753f0d81d10af80d1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB32439195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6aaa8089652714ac9e8712369a4ffbf04ab2b1816fa5659ffdfb2084533445. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZWFJ2494746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668eb9e6dc74502109e4243b57b8f1e3082b079464fb56f385ce32ebb4e597fb. 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/QZWFX2433992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5297cc8c9d3dad07d60cb7f0d17bf26a5d5973cae6966f8b8e45849a349fdc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:20:39Z), 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/QZZ7P2409316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2794616a95c0c62e237f20b4636b3f220c0bb9b81f4cb4e2ecc9cb246c8e40bc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZZ7T2434984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe95e9060c396040178cb374acb9b31c2289cf28bd5c8e90eda753ab3acc4497. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZ7V2405747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ab0ffcd3a9a46368b5c67f173884664202f8d660a7d0a51b2a7cfb90669c33. 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/QZZ7X2494480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fb0ce15b8a58b5d1ec1b46f71fb24b530fee5a38b3cfd779067d59069094c1. 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/QT3EY2480210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d027bd1871e4334ab97125194a0821f7e504d5240d614e079064e0a4289f538. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QT3F42441358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e9d70ba53878e6a7a99f7d783e720dbc4fa52a31eedd25e6610b79e3d6dc81. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F42445033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8852f84e21daee1f416e4220cb6af108d468d0a7d0c8e8d2e8cb1eef1f71a6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:49:04Z), 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/QZFZ42563476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6941add97944f9d88ead1fba40e2136832954872348937c3c2b4d6beef00e2fd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:49:44Z), 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/QZDA42519287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70bbdd2bfb369f5d88b0dd5e4515036b9a946f6e42b92d1575acdd9228ebfd6. 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/QZDA62595230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3252ea39f25625450653b0c56b7afe3e9c36fffe411242f6f96da3a6f183bc. 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/QZES62523554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048973657f2643e685ce5f9d0d690390f47c9e6d6571aeea1a579cd980690f4e. 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/QZK6L2545719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79718f985e966713243f00e3f1d1e2be6c6185991d23e4dc4a7adbf5baa7e4ff. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWQ2592250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbefd1d05c4227a2cb526dbec3bf6f911d62ed1d14ecb510793af3a613eefcf2. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTAS2593624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdfa0560ced2cc568c16153a41de2a4922061a8ad06e027b943c5058bf15ce8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:03Z), 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/QZTB82557347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568b57aa08dafa4c0b9546f38cb4d741046dc0449d250779d0e25290f10e16e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFG2509760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ea8198e4ed5e3afc8bc6a15dc3f99120e5a4ef361b2dab790466563a850b6e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7W2515128.