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 0xc82e865a19589735422b6b66acbe9a4742bb8a1c92f5d42d037654ac8a6ae66f. 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/bde6767c-cf2e-4b2b-9dc4-26722284c790.json and https://artists.proofprofile.net/proofs/artist/bde6767c-cf2e-4b2b-9dc4-26722284c790.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 0xa064146848becba54e31bfa782fc1212d5d388f0139a3f60367e250bcc971afe. 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/ARX2B2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c521bfb597da07e54da0d1573b2f3e8d218ce4c0c9aa44627019559d719103. 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/ARX2B2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebb38dc8c6208f8fdefb471297911892dd86ff15c2868d3d27653ab42253c1a. 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/ARX2B2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa4905f61bf650a57e513c81aeebcc7b55808690c6243a60f19e233b411738c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARX2B2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba09595addf98adf3ed6f6fd8c35ed661ef5ba83d9d30c9a63c00453d138d5f. 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/ARX2B2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd4f06c6353fc5882fa6eaa2fd6b6ef683a2ea014900035636c2ea865e874b. 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/ARX2B2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30a4d3df3fd1ad2af315864dbdd6ede46b544c8ce24ffe759b88bc504065f51. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARX2B2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dc2fd8a34b7b499efbec61b1276d98b044f81dc658835d784d179ab1ad0d0a. 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/ARX2B2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e526ecaa6e795f9fbffb505ab48cb6fe4126bf2a9a6ca607fe028fdaf972cd. 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/ARX2B2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd5c15c433f821e18dd06f9081cc590d5bfe6d38f03654b0112637113df2932. 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/GBLFP2353545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2e8cf9185c68ba4c0b583d22c3953c948dd9f7350443d80828c2807ce6dfe6. 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/GBLFP2396387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a04c9b577633bdef30b56df112e67912459bf98d942f059bfc20e2bbb30811f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMBZ92432352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fd1461781eec72df57656953df34de0a25513a62709461e4d3279bde3ea416. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QMDA62470479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a04c9b577633bdef30b56df112e67912459bf98d942f059bfc20e2bbb30811f. 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/QMBZ92432352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152f372b57e4ff60319a2a2d7d7cdac4c76c35f70be120cfec8cb5350216bfb. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QMDA72421060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6546557c5fa899ab735386f0679b83c5fbbff0137da1c147ba3b4155256a41b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM7282406018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ebab407e73c9a02554a1af5a250fbc235b2ebfbf8bc7ece9cd108ee6c71b5c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMDA72421027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a813b854850b39554934db870a8456c0b8d5c7f13895ec80dc969bf779211cf. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QMDA72421036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520a67b70cd08b829aca903abc23a0ce7078610c4ae48ca85dfd109b6588f70b. 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/QMDA72421037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc432eca131d47022496cc56d08b3c92fa9e3a730780359ce1a6e75b64df75cd. 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/QMDA72421050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c0f3fa62e4d02a5b9797c68d6ed59c184cc6e866169212b566db0acfb4bbec. 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/QMDA72421055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d801f2f46fce064d8093b608332848ffec610637fe5f99605cd6a147958fcc7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMDA72421056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34bb340ab9c9a445524a05ca55891f5aa7f9fe1cbf0d88f152e1f60fe3fc8a1. 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/QMDA72421059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e0e2d0fbbe374fa48017e11bd688fc9734495ccd7492c0d64b46e66e9957d0. 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/ARR4B2200008.