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 0x507670cbb2474a36bd65069b3b11792c2a9a184d1c38bf0453781edfce7e8547. 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/a774719f-ddfe-4368-8e21-9e581cc9d296.json and https://artists.proofprofile.net/proofs/artist/a774719f-ddfe-4368-8e21-9e581cc9d296.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 0x3fb26b732d5b91c033605d9d83000bbaa8bab3519040dd3923e07bfbe707d53b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:24:07Z), 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/GBSMU5392931.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f766af7507e2248c939b918e7cddf2c7ec72a4335cdcaf1ccc68b8e6c094b4. 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/QZES51972325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a8896d9d61e8131f65548d0902dbff4381110c9a7c5c703e8e8b9a81a34c12. 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/QZES51972326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78eb1d78eb1aa55b83c88d459b986210277987217945ceec2e7b9b6a7a7f442. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEQ021902610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fd2a22a5608b044bb2265cee8f083857b69ab70aa45e463c664f2ee45552d2. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEQ021902618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16154d9bff0ee98fa3b62f1fa922ac8d852979c03dd71bf58739821e48e55b19. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR59R1966822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9a8b92e84e74aea07d44a7ad337ea8348fd51654edaf6eeba81edc9c3b3d66. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:01:10Z), 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/QM24S1846165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a5a62a9b5a63e76f50e51bae0cb95cd82c677407253254189cf28712367a85. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:16:42Z), 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/DEQ021906354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58659a8241fa016afb6c6061648b7862e134b39f812571dc2ffe6c2813ffdf7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEQ022001991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd677e90bde0d0b8ab93ee062f92ba8aadda3410aeebc11ad0d8d8896df04610. 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/DEQ022001996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041fa89b738bcff3f5788e567a8481996501e9ffe846c0e298cbc63dc51d2dee. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:57:07Z), 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/DEQ022002008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6063380ddd4f8f00ce7bdc1b7476f6ea5f91639c057226514f26c38a3c59cf65. 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/FR96X2157305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8472e3a0b18695dd0eed6c2c1a2d16241d376a699cac2431de15a0eb3bd5a9c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEQ022290470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8472e3a0b18695dd0eed6c2c1a2d16241d376a699cac2431de15a0eb3bd5a9c. 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/DEQ022290470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab4301299d06c332cd7c900e0eb6b61aec1af24cef4e9d9e89879b111a49fe4. 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/DEQ022276259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e31d7d283bbb7f3e319d082ee77a089089e0effd9a9747702c1659f00a7994. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:00:56Z), 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/DEQ022292223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816553518ef7a0f6a2759062253f0d364364ac2879380f79f3d211588aacb5b8. 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/DEQ022391967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67f95123d7b66821449f0eaf6938ec47225d065012b5c851dd49140945d5fcb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FR2X42453238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee702ba01c0b26ab298811d9ece53fe05333d11afa07a1f07151cd651a1fd604. 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/FRX202463140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720431aad867de4f7978d2d7e7e220f7b99bfe6c65701f069657c3564ea56ed9. 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/FR2X42453243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bba3638832697cc6e4011dc212a80d62d4a58101d95623db6f7ee0583609357. 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/FR2X42453247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5753298866b080c81e2cb2563fe6e9f430f7d5f5e9064862ccb3b52c3ca7ac3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL3AA2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83101b7cf42e0a13a31d318ef37fa7d807ca8ca2347c69e765fa48d8368533f4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FR2X42551058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010d217a1193207a00d4f330488f828e67c85c94f4b38733de78b05fa870d93. 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/DEQ022384400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04020927fce1575eadac67a0f85d0919492e9da51e143ff2b041033da7b0125. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEQ022384398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010d217a1193207a00d4f330488f828e67c85c94f4b38733de78b05fa870d93. 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/DEQ022384400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c40ee03d391846a2b3f2e66035194061f8db3da89fffc734e9594d7e0eeb854. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEQ022384404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3c08cfa9af4fc468a616299c5fda41e3ee81f75951312dd28dc8031f10857b. 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/DEQ022111418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0759e07eb55b42c99567a3f61dd054569ffad2750682aa3b658501a29106ad0b. 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/QZS642149283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3c08cfa9af4fc468a616299c5fda41e3ee81f75951312dd28dc8031f10857b. 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/DEQ022111418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bad00af4468349bf602f15ba169481e80151dd481279268adb9aa2394b58728. 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/QM3DF2128255.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bd1adc5c33a68da970cdd1b9596b1970a115b8f06bdd90236ece5333ae9983. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USANG2078419.
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