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 0x25cdd57c3f6685013bdc9f56c01a0cb501dff865a68ef478c44ec286e2034595. 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/497cb3f7-6f38-45b9-b6e6-a8f36be2b3e5.json and https://artists.proofprofile.net/proofs/artist/497cb3f7-6f38-45b9-b6e6-a8f36be2b3e5.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 0x20c8ed9ca3985306fcbfafa958ee6900d759fe40e1b45f1e949255349b7ec8de. 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/BRSIC0500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94f0fbfe98616aa6301749f1799228a11caead2d66d62b8d4b57be5d414682c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BRSIC0500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceaff962426a3f5f28d088c1e447239558121da162d9e5b06903a6e9feeff26. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/BRSIC0700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96314a3bc7a2bf615495d7f31ad0929691a8b804fc3f5c715ce46e6955300348. 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/BRSIC0700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59c9ce5b428ed7450a9589c038d55a747ce3c5a864eb034eb1f4d4816166663. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BRSIC0700146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19a903864b609a1e812ecf3046d9abe2ece218cf5f082d76849b3f8c4b8d753. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRSIC0700147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73faee42328f75b4e8e594712c6138b886250b400e846bd3f2af55772949cf55. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/BRSIC0700151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0b34a0b15154a064514b0779307403831d1a482793ee36b05b58c8beba9777. 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/BRSIC1000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba78287ca0c1b8a9b87dd758ae1e27583a294708b7b94a101520b2645f68d289. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BRSIC1000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ce6eb9727a504d60412c85fcc72856e3b4a301e2bbc91c3be20c8b75d0ab88. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/BRSIC1000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe808b1e674d73d0a232fd4e98ec33b507ae91cd4c303a35d91b8771c1a6ac. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BR7QP1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b83073823f1b020fbf3a481e8849b978c5714528074d017d8aed1146c57e38. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BRSIC1400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0068c83362fa9893b447271efbc9940ccfc87a4e26daf31af457603f9b3168e. 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/BRSIC1400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e7469732290fe2dd023591e232ddc9770f5e7483c1c0e6e24212ab7d626474. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/BRSIC1400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ece9d1c4d3e2b5d75380b44f06426eeb8275cd5433a5240eb494e51c34be2c. 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/BR7QP1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034faeaabea77e5b2d634908b921bb8ca5c095af104cabd5a439ca4d9d3fe12b. 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/BR7QP2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7d9800469a758dd1f0d4ccc9c451c0494aeaaeceed610ea0bc61b98ff7bf1d. 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/PEZM91902580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ac04dee8f5b0b0532f78781a5cc29bb70edcf195f3ef9b00ef5be2249490df. 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/PEZM91902569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b1a1b77906c6861332c863cfedd7d6aba9810d02cf417b64008ba8a020d19. 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/PEZM91902561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173b55f26babcbcf3d1eee117f0c3600fd42ece5830bc0b1701a813963bb30a. 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/PEZM91902571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe144de7fc212b6a8a72c9b8683fcb3978c98d73802d67a744c985d0cd7a5b8c8. 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/PEZM91902579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b3b0b98112953d2de48555d269ab4eb9eae6c9b191b85226e15c2f0942275. 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/PEZM91902574.