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 0x423aae4cd9a29c52a1919df5b77837448da6c22e6326096918a5d343f18f154d. 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/0b81b515-debb-4303-9908-7d9342daf0dc.json and https://artists.proofprofile.net/proofs/artist/0b81b515-debb-4303-9908-7d9342daf0dc.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 0xff652c8ec8e16f344fc346c6caf45b7e088de0e75084d52cf8283edf51292422. 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/QZHN82220067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdb2bc888222aba16d9406c2686929073a6cb8d9cb6746396f6b3075f0a18ca. 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/QZK6P2259444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf52a560f456e0ae180d5cbefbe38eb1bb0c0ca803fd4de03cd78bdfd826026. 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/QZK6J2201909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c786ca30b127b2d87a5b0edeb76338e4d20e5404d9a837170417b1536099c73. 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/QZK6G2270579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72420da49caeeb487498a1856a8578009c66e0c924cbaee39f5e5047affab8da. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMEP2231243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e731faf080dcece65a122e46f192abb6db53c74a888a8790a104dc6fd8fd0b. 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/QZTAS2225045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9e936eaf27aab433dab8703782e06d5afb36a3bc439ba5d2f25093b95bb4a4. 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/QZTAU2265956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843c17c6c6e7520f2bb261e29468fe8739992024989ff26131b8557fd26e0970. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB92251692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a92c588f20afc6357c4230d256ac6c07dee360295b4bdc9f0f2ea051895e825. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:40:40Z), 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/QZFZ32372158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728ff5b4c7b7c55a083196939e470d8e4a3eb4a8de5177fa4cb286104138c3db. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA42386410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5ca8c544a89aa7b8a287e85f4db4281c4b6e04449433623da32516066d626e. 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/QZFZ42383739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6232ee9f7b1a2740ff99c3d38e5d2058dc28c429b746bc3fdc2cf28ce95ed35. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA72342307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8869ada7e109f3a5db20f22a6f114b239a559f06b4915d6ca6a616581e80580f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92312165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a697c88e1157c6eeeceac622f7be30f0f6ea3f1a79642ed5b54424ad0f2ce1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6L2393129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db33601ec5ac72643603298aeb9b927c3c261f625a200009a9e3c6bba9438b4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZRP42334963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb0662482cdcc04d24f73ebf89af1dfa667faea3805c962fba34c806c5399cc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:48:54Z), 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/QZTAU2335377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9e8d562ca269e8d8e9934e9bfc9de71ae617d3ef5417a23942a2e5ddad5d7c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:37Z), 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/QZVEM2364446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ca9638b90edb447e80ee342ee072eee45ffe34ce36ffc16611aa0abbdd05c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZVEM2373310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74696b676206ea0be63e35c902581b44a9a100bd8dad8ca86bedb8258d07ae7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2373311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a74b5f42666ebe3b4d3f88620ba7f3f1e616950ae011650b9033a567ce1ee7. 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/QZVEM2373312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf956bf47410ee4f47ae8b9a3d273799df49a47bb22e53442edd324371cc15aa7. 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/QZVEM2373315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f48933d1428ae20fdb82fb6837b278dccc3781ec7cf677ec42ea05d3988eee9. 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/QZVEM2373316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396e0a9e6bdfeeb3868ff1cffa2d658a26badaf365c0fb082a66b05d8ff70c89. 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/QZVEM2373317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3f1427bcd5ab64b8b86409e5f3f9ea862c33545d8b02cee8ea3d67a5102a37. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZVEM2380932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94872dec98216f43e7b23a48d7fa6253d20d548b498b2eeabef7e61b1ca1c825. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZVEM2394254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cc5b847e1cabc8c127a24312823af500cebf02dfbd02b35a89fa38cf27ccf7. 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/QZVEM2399527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97af326ec28f0e0f5a2c0877d7bcf8f14da7d4c1e7fa9a420987598301b0225. 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/QZPEW2405771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500b3da0371f71d7d780277487d73bb5e7faab8028c7cdb4b75f7d9fbbc197c. 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/QZPEW2412014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787ef52a2bf0911eef58c3635a76a0f24ea258161d7139dee02d3bc16603d6f4. 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/QZPEW2431462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6958d74345c38ba9467a0fabc3d171e9eaf3d230d63dbab3b41a1e89d0f9b80. 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/QZNWT2424244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1861e55ede2ebc404f3a110c08c0da139d1158a533263c1f1183163631ee18f0. 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/QT2VB2442360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f85ef4d5ee7a02f59d0e7862130d5c39992814da509b558c13204bc9d4053. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QT2VB2448128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21946c0d78857107509339b5ea9fc61415b26341798de4d38482fe36bb65d843. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:33Z), 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/QZVEM1842120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21946c0d78857107509339b5ea9fc61415b26341798de4d38482fe36bb65d843. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZVEM1842120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cbfcb7894e1ebd0c4920bec607c540b86db305ba91727a42552c2f4a669578. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZVEM1866477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97af326ec28f0e0f5a2c0877d7bcf8f14da7d4c1e7fa9a420987598301b0225. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPEW2405771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17109d491a2aa166eccc7099536ebf041e100db759e26c1e3f81da7866a6bb44. 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/QZVEM1866478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94872dec98216f43e7b23a48d7fa6253d20d548b498b2eeabef7e61b1ca1c825. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZVEM2394254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232cc5d83157b8d414250c0f93a83163855f9c456b969b33abdffc05ac536074. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZPEW2521254.