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 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 0xbfa8dafe7938d4534d05661b47582023308663acdb7d5c45889083a87f9ef168. 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/6ad1322f-e374-41c6-8699-219efe8b48d8.json and https://artists.proofprofile.net/proofs/artist/6ad1322f-e374-41c6-8699-219efe8b48d8.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 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 0xb745babb5f68c9e012aed367c238f9939729c9268af8ab00e861613f118d324c. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZK6N2176576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f67f8d0900ccc7e4fa4632a0110617f448c5ff528d522730ce4554e408c676. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMER2145877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d3b370b96cde05d9729af9254b28bc6a35f96017a2f93137ead0ac83801643. 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/QZNWT2106747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda61dd0bfe6036f1141663b25b90fe31e4d0f47516e8fe8f13db6f5824e53983. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFYY2262009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03678e513026709a14c09b5ac355017ee7fe19ffa376b3f5301e74ac82479db6. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZES82293022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b32f7cff36cef9b97b3f8f0c4d83e5dffb278a7d6f47f5903ff434e6f6813f. 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/QZK6H2215070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3042a85bbb78f855130f007d2a297a5216883091ee4fc5d5d483fc951844eb47. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWX2278589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbf87755aa85040ae844da896cd6783c702842260e2798f6ed5e5e3392ec6d4. 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/QZNWX2278590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab5b8c2cbd57b7d49b529e774686b7433979c0eb5f273fa024f4ede75d88009. 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/QZNWX2278591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ff4c255a5bae3b81633241739fdf7b204ed6f914a8870e4de33d61a11baadd. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZNWX2278594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ca9c9172534ea96366fc261cdaefe65b616161c8fb533032afec5b87555794. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZRP52241959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904cd3fa56745d2a442ace589aa7dbf64d76fc1367750ee07f8f7f6090c19727. 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/QZFZ22310804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84d757c2c64be87db0f866cab6c8a096146273e1d822b3a12f28322b2297810. 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/QZFZ22310293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e014039339dad3495a8434e764d03386d3369d15f480b5427e9b0f77ff00c4e. 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/QZFZ22322728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67847560821deca08fbf62b486c51c31a9bad343276f72925d5aece76e808b45. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA72348310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c537a0d52eec2432da77e547afbc45b5c31d854562e1ae06e506f7bfade8d9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA72348312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc943de1182e0e21eb48aa690eb233d0090a1b9c9e96c8d75d80d40dc20e062. 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/QZK6M2335735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca1552a691b44de0011dc4529f633fb801a0541a6d37e8795f14b088bcf7550. 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/QZK6K2306670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed1c02ad165a63a14409d6d8aa62b802084fbe5f23029068fed7b53d426568a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6J2372312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31e95adb6053132546a2169840dc71ccd85ab7caabf9833753e7cf6013297f3. 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/QZK6G2362044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70228c96e65f860510a2eed232471b3fef1dbf4a75a0401faf9887c4ed5c1afc. 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/QZK6G2362045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ddc999e24478684fba3fad5d405a44724721f0cedf1515a38404b843cdc81d. 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/QZK6G2362047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a4d1fc1bf76482e7ec4e3e5947821771d21505fc889c57deaff9dbf49364f9. 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/QZK6G2362048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0007c5cbe6e87d4ceee8ddd3caa3f573d4d8432054876c28b462834cc5ba50e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZPEW2405312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285abb91320e25a14b973612fd57d54a6f67cc22217d6dc9b06d2c91e2195f82. 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/QZPEW2405315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00390643e3f7b2f860ee5c4646f8c250635dd0a51695b5f99f27d422ce39e25a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPEW2403703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f973e9a82b3e2d434a2bc3653d2b31190110302a5d8305798623ee17bb15ce0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWR2488449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a5c07f40fc626b644d331a6998ec0a8fbdcfb5972e1ade0ccca73210645e96. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NL8RL2430415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2a3da025cae4f1372f7d36c86a949f6c1e8218621aba7222fec3c0b6945472. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NL8RL2430419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847b89542047819267c7fae591ba1975f3ac9eb2199837db0027eabc4ae69134. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/NL8RL2430422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb184be848106768542060fbfa728123bdede77a104812508557ad476154436. 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/QMANG2240837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989ff2d9e352909bea0367ce47d23d952601b632ef93234871d23f9a484aadb9. 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/QZNWQ2468535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d111408fcd067d3cf5cdd74152590011dbbd50bd46869c1f29b27a305761a64. 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/NL8RL2430173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d111408fcd067d3cf5cdd74152590011dbbd50bd46869c1f29b27a305761a64. 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/NL8RL2430173.