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 0x0b6af62a5f956d0e03f460da0902379592d492db16de9e93fea2a559f44a570e. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9f2a71c-2632-42be-aba0-4889a5f9008f.json and https://artists.proofprofile.net/proofs/artist/e9f2a71c-2632-42be-aba0-4889a5f9008f.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 0xb09949ac4d00ff4371388cdb27f0d096bc30504f2b36ccadd34a9d9c0ebfdaf5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZD2069471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e8d5173832a31d9a662a7b1290eadf5776151afbef7e30090bc467f4cc95c2. 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/QZHZD2069475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951591dad843da69d807953dee770014f4e9c8b3ac0b5d98f7d2035d904fcdea. 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/QZHZD2069477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39657495e796ca66ba9c73de5ce281310d7a4dc6af537efa3f1be6ab8a016d01. 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/QZHZD2069478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cffdeaffd5e64089b2553b86eb595b4eb3d1aaaa18d3a547d98fa3a2c612f4d. 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/QZHZD2069479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf340ef209bac5018e300d250ab417615927f3e2c84c63833196ee875c3d4bc6b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZD2069482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cc9564d186f6aa516a3babd2f7feec3967cb72a283f7421698c468105c00c9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZD2069488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b6f402a8d5842de91a12556835b9af5a14b672fe4843346233048509c655b9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZD2069492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad428ca90506b4ac5639ca7397ea557af1307fdd5b063d576b24b35ae3d624e5. 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/QZHZD2069495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e659a2534750226f74f7af9b2361b303c4095e4fa5d713126602d12f0f629ea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZD2069496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ea8a4fc47a1094e25ce52a98bc3aa487f96eb43746a12ab2fad0918e448566. 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/QZHZD2069500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c38e234f6ccd182d4688743dcadd6bf46185559f462d9133322333de01cdf7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZD2069504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde24fab00f5d91a99a95bc27324b9663a35b600487ef7cc97c5d5544d4f3e216. 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/QZHZD2069513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761d011ac47b232be6bc48c07e7f96e8ac4d274ce2da690f5e26c3ee5fc1c1b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZD2069516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763add633880d71738d433bb5a11bdb354961915ec396f688e643f37bee7c679. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZD2069519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4030b6ee990223a13f92eef8a6cc9c2be2327c837e887bcda152275f6e8ad4a5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHZD2069523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc192123b8206605daab91a330a1a0298f6a41c17f71a2f6ff2b850ae2787870. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZD2069525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93b4f793842087ad3d9c0ba799a9c1cc485e52ac00c716903b4086925f8a260. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZD2069529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7748ec7b99024aec3cc85412c1d0599df88653fce1c6addb47cb1b319e96fab8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZD2069586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb788ac48185ffc30042a3fc772d3a3f782dd5f67be9bb191eb6faa1078c2fbbc. 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/QZHZD2069587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa767dd1e2ff6fc211bdcab4d21d268ca937a775fd074d1e4ec3ed34e98872015. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZD2069589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946159ac8728a2b68e629f9593cd98d3ed615247b6abaa6656a79d51e0b7130. 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/QZHZD2069594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf485837f20925599b241c147dd9047fb09885a2fed3c3b04e060474b45b4fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES52330389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5f4b66e8219d0f5b51b2a46eed18e869e395c4870da19eab957f8c6d300e60. 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/QZHN72033561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef6d51403e84e26001c5f00944281a1d0dbfaa134ac781906af3193608a60c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2020928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a883481aba0bad86501c925b39539a1c9f188b3384fdff1608fc132b7de613. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2020929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b836d584564fdf8a4ba37ba0590f2eaf5a565cbbd3e56e73a10692677022514. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2020930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a6928f066fea9ac0896c0245d6737d659883cd812d122273be33da82fed47b. 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/CA5KR2020931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa539dcecacadbc533f24831fd7e6ca179d6dc98839883d2a674bdd4224d397f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS652303724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5ed20b631964f9dd5714001b335a6d9334bebd8cc9c69d186bb3ee62efe192. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMHL2364183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8e141c198492cd69c081a8bbe234f44b383375b6ff7a895aa2175281aa346. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS662244457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652fe55f2265b197ed3acdf5d7fa5f120235b6fdc90bb1e5ecc06406355ba702. 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/QZMHN2246613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86795bb62185605e4349b18bfe96198edf5d39c755dce24466f66669aac2381. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZMHK2220620.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78caa61b181746b854f013495ba85c56e6452f34acfe8680e7944d313968b25e. 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/QZS652339726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e0f5e7fa3e02f5a5c5bd01bb60b65c11a0a15dac5614a724e81533e689f02f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS642381405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66fe53885145b24129131066160b6cae15c61f037e43d3ee8dddfdb48773da. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMHM2310031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d95c63e4aeb7dea9852d22453c2ea8aa73144cdb6f3a93a3e306f623af728. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHL2389408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bec6287de767975d57e7abaf254da7bfc7f6892662f7d681d191ca6387b53d4. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/QZS652395276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee2c0bed4a5979e1e1571705fa709cf425de874c8f54a70ccc5fe38f7bfdcf8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHP2312987.