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 0xf3d988923241553bbf4e326800828b89df8cbecb0f6be38dbdc7f1e7a21393bb. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c27baa19-ebdb-41a1-b5b4-2e8a3ab017c4.json and https://artists.proofprofile.net/proofs/artist/c27baa19-ebdb-41a1-b5b4-2e8a3ab017c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xf4b18f992bcc163b2fe020285c8e5a6c827e3eaa84be7e5b14655cf251a57e7a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAHH2367469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bb93bd2fca82ea476589521c785e0a22d2dad0242b68445c114f5126178bf7. 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/CAGOO2477574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc48b5b84ff386f02c5f6d73cbe74b1c0185bfe5509409ca31829417c83f95c0. 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/CAGOO2477576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbecc33f4c483fff1eaaf25cc3eaa785ff9c8cfd12a19a793d411d066a80e53b. 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/CAGOO2477577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c9b35b2d867dd93d77b4a805403a6b641a85cd82096b8e2e5752b908bcb677. 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/CAENV2549035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c44e1db1974f61250052a1404b14edbda08db8c6f5a3434709582a4c92b42a. 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/CAENV2549036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf138abace0d306fdffd9137f76d4af2a5e8452911f5e031bef8e35981bfc6c43. 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/CAENV2549037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2bec4076e73490692120e8bb9fbeb304900e605f19aa4b2242d801661092b3. 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/CAENV2549038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02097ff4a198ad0b05a9f3711e487cda368e3c8d62578506bccdb91c8e537bb2. 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/CAENV2549040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced212bf66d1624b1b6f75e486a2bd06a8554fd1254eda9d15a777f6322a87f. 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/CAENV2549042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a809cb0166ed4eef0297e0ebba4a494be9e737f8d53c3794c58f3aa512e97e4. 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/CAENV2549043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8bcb41857f2e53ab82ffb78e94cb9332eef2c71df1e8ecdd9467a40a858771. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CAGOO2477543.
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 0x438b9c622d731db3fe0304b00d130db507a52c1ebbeef44f9a7646b16fe81827. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CAGOO2477572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd956e8f5879fd3dc0df089ab5c56fca840844a6855d2d6382ac1279d2ad246ed. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CAGOO2477573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb348de51abfbe9081d92544fec74d6d261c47e886b5f98c1667b7248b3cb1a0e. 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/CAGOO2477575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99689f364c94ca06605a12fdaaf57cb4e154cf88ac038af71c594c9e3e98a88. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CAGOO2477578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a472cf4497eec5b45e4149b06f48555e126023f6db3372eb62345c7e1d3f0f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAENV2549039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fdd5c1a717962d086e88995681756e9af7785bc58220b8cc58d0b6de0442b3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CAENV2549041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc152a05ae63727d557d573b96a3512df0578a4e7e3a9354f669953ae322ed80. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/CAENV2549044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b643ad04d5cb2526e9156c6239ce470988ef90965109c4092af419f671c0466. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAENV2549045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242587de162e96c9caa57e3e36d4036c9f03e452a014a4480b7d22f464c7f82e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CAENV2549046.