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 0xda0fb69e5a1f97e2e058fc51ed8022edfa5f82cfc790a46c6b5a82a13a3a195f. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/862727db-c019-4c15-ab17-7b5a8e3cd553.json and https://artists.proofprofile.net/proofs/artist/862727db-c019-4c15-ab17-7b5a8e3cd553.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 0xa44f04af7e92d006f0aa2ba463cd41f1772703bf8b250bd3ed4e7d3f990730d1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ROROT2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7fa46cf14bb78da5d13d65169544f2a71160a4cc196a7847904d8dbb092ae1. 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/CA5KR2383444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3dd9178a816f8c868c2649527623d4938f3ab31529403ef5fb9a821354e591. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ROROT2304000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fae71aedc6259d9452a0dc24f01946f0486ce47f8bc7482e1f97fbbf3d7b31. 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/CA5KR2373974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487561bb03a863df8c40caadcae452fec58583275b5864fb2de4f6c6d566efd1. 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/ROROT2303330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee04ed5009efa11eb1250354b4f496938f444d94118b8b92b5c0e883d5608ff8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLRD52203730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba9c8642c5934e3081a28ddbdefcda0f8ae648089a260957c8c80e28e49a9b. 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/CA5KR2338894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b7e457420a4cab2be8f8da400b9390f91dddd4fb21c7cd6c12c2d853f17bfa. 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/CA5KR2338895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37aa8178e6d56ff6d6613aad0ec0ad372e93b3a10f9f9f1827b1c3786bea1f3. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SE5752307349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978f3b22c81b78a2f356caf0c6a0594455791d90c4fa51c9a471f752a147f573. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEH742226007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b69b5e494e21d89931be55faf3bf110f8104ba7017bb5f0e22d6f0b69aea17. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEH742226008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5b6fbc3e883d8f1b109cf726a062cb69c46a5375b875dfe2484a18d7eb31e2. 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/DEH742226009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f565fc86d563660fbec75baccaa59948564618bb524ba7ac0a20e9058772f0a. 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/SE6XX2265400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d141967e6cb31601cca5ae95e65d541c1bc95d1914a6b2543f24a1569a247f. 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/CA5KR2284469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af1c0c76e975bfa0e357c7758fdfab98a58fac3ddce32fd5b0699faa8b77f70. 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/CA5KR2284470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2e9b04900172217522c6912aec536551fe935c7457f0f95582ab3558137c60. 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/SE6SA2263080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303a1da3960a70b245fbb1b8067a27b51d1daf6b49fa5635ef04a9300094623c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5752295532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad271617f881ad26f15bc08b4adfe22ef17b3deb2b5849b353c142f1c31df610. 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/SE5752292502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e6f22e512f070ce05c00d20b38d841b588342e72c3782cdbc61550f6cce31. 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/CA5KR2207981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b05a927d2b75c8dfcf1243f6866996b05e69b7df2f031cf579f63370251dcf. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE5BU2265370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db30491d1682efb3ea1857c425692112e2b924a8d0960301b65abe9c38ed387. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2202144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb06f91cb3ebb4adcd27517f9aeb3df05cf8902b4640d9a41d5c0c43c2fde230. 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/SE6XY2158609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeca4a1874d235ea38016b3cf38edf3718e09b117f07876f086ab868ccb763c2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZG2X2415549.