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 0x662441d52e309f975a76d349aabcfc7d1c9898a325ae63c3be08f14994d96f6e. 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/16240457-973e-41d8-b42c-cdb188281a4e.json and https://artists.proofprofile.net/proofs/artist/16240457-973e-41d8-b42c-cdb188281a4e.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 0x1056c1b37a3c5aa583ebb34806d6e4dd614aeeb6ebacaacd81f88dc40b4f849a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92184057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c71c683cd86e82f57d9353eb00652ac9e47bd213aac25d731d3dc9999e263c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QM4TW2317019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b02eb16d73a36422c4115ea9e28e27c5ca9a5b359d3bf0887f332126fda3b3a. 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/QMBZ92327598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac33db7d2cc31513d4a1c39e6765bc4986f6d42ab6f272a44224b39e1248d81b. 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/QMBZ92327599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968bb33d6552d507403e601fcd20165fb75aa9f954baa9f46189cd5e2f2c753. 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/QM4TW2315986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ba72dbc705efd145dfcc5517089fbf3fff4a1caab9b054d145440c52e4517d. 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/US66W2100551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b9ff663653917c6ea2466dc88b67e9f355e873a2bc4d214a9280befc2b645c. 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/US66W2100621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98beebea5b9385d13603246baa43d179d741d65118c85e3f157188da09724a4f. 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/US66W2100641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26710cf9705630e6bcfc68a741825a87bad7e447955f23c7851e67d8435606e7. 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/US66W2101701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b058f96856607ed74f1bb8a1c8d82dbde475cf7ca56199b33ece6227b13d88. 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/US66W2101721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe039f77be9b62c65a7cffc6d63a431d3d5f5438601f10d52dc1c9dc0bc96289b. 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/US66W2101741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71462527e1c1713b42cbf10c4612f824a3e8bc80eda67a4e61113b185b7ab8ca. 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/US66W2101743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557331df3f448ab69bff642dfbfb02aec5e213d50497c7e9defe4fcf684dc913. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/US66W2101744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96866a12351791650ec32d641784db4855b0bfef8132f653f27374ef6e2b2968. 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/QM6MZ2127102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe4921283d31ead381c9776f2f27a0c0933f4fa49c5f5f420db074226e6d471. 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/QM6MZ2165482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102387ac68080076d3155652d3e0917d6ef452bb3a169fa4db04f912bec14ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6MZ2165524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1bf3930db3686886cfb9c02ffbbb19c399d1aedad9fee5a0df92c42fef9f0f. 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/QM6MZ2165950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbda94d52a77adf8d75457ad9da5486d87c9890844789f3273abc9b078a68e0. 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/QM6MZ2165936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d4516555d0f1e638552dbfe9c5e3d3ad09c0656e4c314e8fdb12aa0436442e. 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/QM6MZ2165948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e83e3e318138bf09f3ee2422e94b6939f5c1095169c1bc300f46b91db59e44f. 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/QM6MZ2166248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf454d044609c6d9d1dc1ef279e9dbf2e14b422a035ef1c871324ac9788a0842. 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/QM6MZ2147245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baf0d9b95a44974fa8138fdbe69ddd7b64d5bff7fc319b30a112e59837cc89a. 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/QM6MZ2165987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68d6d03739514b77ec3d7a52abbcf1ff66e5998164bdb7f8a215659cb75ed7. 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/QM6MZ2166166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a407eb16122cfeff00ab598f93a4879968770f9454e76d714fb193e8f242a2. 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/QM6MZ2166221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c9a0e4d12256a81c25a934a5550eeb5f65eb590e4ab4fd6f22d40b37ac6e7f. 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/QZNJW2402609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0273d9dbf9c7c886d2a6c326226a32c81b0edd66a560a2f751662a6c4721c5. 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/QZGLS2448159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1457b5bd2e6932c2cf8c6bf7348e66bea458d4ab018892614d4b727100b859f. 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/QZ5AB2481321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21603fc80c8873287e54ae548b1f08aca2b887336d82e9b1f26ebdee32edc689. 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/GBLFP2435234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58df8d21d68f1d911b7b2f5d66069df1abc98de743ad90e740a52a1a86bab8c9. 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/QZWFS2308715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86077893ad1f1800e18994ba981dc372d9feb0914864b62e70da236699ca759. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ESUM72301483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e159ee695e2d5c916a852b62fdf609ae319343d6f9051fe9a410eeceef4a977. 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/QM4TW2317029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c71c683cd86e82f57d9353eb00652ac9e47bd213aac25d731d3dc9999e263c. 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/QM4TW2317019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b058f96856607ed74f1bb8a1c8d82dbde475cf7ca56199b33ece6227b13d88. 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/US66W2101721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26710cf9705630e6bcfc68a741825a87bad7e447955f23c7851e67d8435606e7. 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/US66W2101701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf454d044609c6d9d1dc1ef279e9dbf2e14b422a035ef1c871324ac9788a0842. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6MZ2147245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ba72dbc705efd145dfcc5517089fbf3fff4a1caab9b054d145440c52e4517d. 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/US66W2100551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4664a38c482a9d8fd3958476ddfe08fda0e5e0c988842da92edac3c6733f47. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM6P42095816.