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 0x609adbeefa342146f73552f7ed8d4922498d20a35e57bfdf71c7596e290da3de. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f307b0a-5951-4e3b-93d0-0db615d20ad4.json and https://artists.proofprofile.net/proofs/artist/1f307b0a-5951-4e3b-93d0-0db615d20ad4.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 0x27bc0b0f52b8db8e942e71403b433dd3b630ffe0b6b281a5ff9766ed4fc30f6f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITOGB2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934b1823f0910f7165aae57c477c91acc0a2adb6e5d2412205a1a563523054f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITOGB2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64759752de68ce446d72f52b1e880677e390483ee0a03d916d5fe298612587e. 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/ITOGB2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58136383755d83b0a2984c2fa3f39507b4b2345d46e90565ace3b89e9489afcd. 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/ITOGB2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34215277d1362064ab67aa401b6977ad5f9adf773eb5d28650a90e52b31acf48. 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/ITOGB2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382fa46b0180e3d44ea026d846f388dbae86af0036312c285d1c777250ace39. 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/ITOGB2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63503b7cfe51c93a4b68ce94c45c1b51e3ffb405df9c09b2b93051c3d83b0cfc. 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/ITOGB2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a070bd3acb675812ac1ddbf1b2506aedeff9d6b013607f2c90dcc4091d13cd. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ITOGB2300054.
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 0xf3711df3759af9c10af79b42de4ff30fa86c7cbaf34ebec1117cba08d2d19ff4. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/ITOGB2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dda277425ec12bcbfa15540a0155f3864520995e1eb2dfea5128609fbedb51. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITOGB2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8c6002c9ad5ab43ac7221b10cab47a51233298f4491bedfd1c7c187921566c. 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/ITOGB2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dec204888f5c1a3e6c3544e1ae993858747eb8a46bf95993bb2f4785220d7e. 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/ITOGB2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64d0731e481389d4e48ae0fd4645582dbf60258bb9cc1a62cbd7c05c9c8cc7. 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/ITOGB2500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54313078c58554de4816b90f9b77a85a996ba1f19049ed033076957a1afd6b11. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/ITOGB2500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965c8ece729f4ed30412b588474d4b5008d35eff51874f89cde4e2e022363154. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:56:21Z), 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/ITOGB2500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847693ef64339c61b88e27328dcbb2bc3b7dd402e14db7af529f20db4bb31d98. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITOGB2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5c9424782a9f304d929dd549b84f882123b60221a4545c95081e5f7dcaeedf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITOGB2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9910994a2be0fc716abd9bd6c9c568584c6850c1315983da700535c3eb6d182f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITOGB2500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb48a7b1c261b618a476b3ab74356aedce56969326d534e0bea4cded449ee38. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITOGB2500096.