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 0x552734a121a32176cb7e11a11cc63ed1187f84bbf78cde1b65731e09baa039a6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7447683b-75f7-4b06-8c4b-04c163575cec.json and https://artists.proofprofile.net/proofs/artist/7447683b-75f7-4b06-8c4b-04c163575cec.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 0x23f885b28451b95af67ef4afab5d2d92478a91702512be54a2b25cb89e3679a6. 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/QZ5AB2004847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48917d251891994062182b93f4fe735986b006bf87a85b8bc5fe6870fc2894c. 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/QZ5AB2004858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d32b0a970488fa9342a4d8c772c95a33af056e11141c3e01501c4049a94d5b1. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:10:45Z), 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/QZ5AB2004859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf338340092392fa1f7caecac3773ee459f667b3e46ae5b372b17997e4208d3ab. 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/QZK6P1917944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58464871649c95f4c80de92d7890338f91e7995e2166b92d67885be4db2816. 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/QZK6P1917945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69840214be55beb2dec5514f3d2641cc291353b30877376aa3ac8c394bea5e2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:29:41Z), 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/QZK6P1917947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6515bf75ee6d66c00371e8d41d250b6476910716c137c968345e995f9f2afb0a. 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/QZK6P1917957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3defe082027de20b9e6e62443fc4bea22d40c5c8bcf9d578adae20e40f612183. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:19Z), 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/QZFYZ2095149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a50010dbf4518f7e82c28e84d6cf7e7b2e40b7450586e695ea5e48e608f4c10. 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/QZHN62023742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2391fc48fd651235580f32c331df63261360ff6e88860e38d3b54c7182c4d122. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:39:52Z), 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/QZHN62023743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12ac77e720df31ec3ca7a009274a98a5d9751c4b469ff2bfb4182086e49c54e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHN62023745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5867e0016550d5713ac6a7287119f7b69f47b15588f696a08ee872a00caad0e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:16Z), 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/QZHN62023746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b749cef921fb10a0085f3bc30b04abd64168771ccf9f51cf9c1721bef4f25cc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:29:54Z), 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/QZHN62023747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0dbfd6a0a2d3b526ba3b8cb97f0b1c52550b822bd4461b3f429ff760083d97. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZHN62023751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c27a746e3ee45670ed444656ad3d8f4e061f281c019e07a059d2a8c496ebe. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZW9L2306807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c1627a51a181ea1bd04f29b3074d32ca2a32224e24763e3d399005eab55b96. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:03Z), 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/QZNJX2464600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e3b60ad1ace0d3bbbfed5a40da55f304882d7e2d08be47701732521d64e103. 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/QZDQH2252546.