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 0xb725069ccc0c8c9a84bb1f5d971261a7fee8a2504491fe594efa94f472b6ce9e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5773fa1b-09a5-4ca1-8969-d6a231ff4430.json and https://artists.proofprofile.net/proofs/artist/5773fa1b-09a5-4ca1-8969-d6a231ff4430.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 0x629963cc803ebc591d8c5fdb508f0cb2de42b9feff918d68f5439f82b1e74dbd. 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/CAH681700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a845ada3f6227436e07a82192fe0bf75b2d81ed504a57545e4bc4f3320de3e. 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/CAH681700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f56a8c5addda00d8054820da6a87dac3cd48619c83e68b25df8d50e782abae. 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/CAH681700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b053b16d66a6d374082ecb2a27e11500014d261b56dbab44a3577734e22b90e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAH681700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457dd0233ccef100729437cae0874b930a3e18b4ec49636b7fd5f34ecbce69e3. 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/CAH681700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156b7306418caa91b428bc2721c9790980cb011cf9046788d0838c827fc362a2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CAH681700034.
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 0x15219f6fb48bd0d3a725ec8273e73561b954625aba60ae9eae701aeb02f5a258. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CAH681700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d583cf2c2e6588181c2cbf11b19ed532b5c4a0f6fbf509992b022727aa189b6. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CAH681700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfd3a6640bfa464380bd3b30100ebececd8996b099c993324ea0b2e6b188521. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CAH681700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f774037213a931362def6bdc45f896f3c9281329d9bc3272ff2b393b069870. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CAH681700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8893b0179bc476a7daa15982a0779a5b5747b1f073baa6c5c9afb51e6274dc25. 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/CAH681410019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66cb35ab0dbe476795ef6fd54e29969b2e507cc8c833d92f8ff25d213fe8264. 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/CAH681410020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950a83c53db5b18c2ae04b0e87c3fa462b47cf5f0798b7a090a74182939a644c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAH681410021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13c327e32a511ac8d4f0e79c547439d5d70ca96756f01db3de317d320b4f2a8. 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/CAH681410022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08fec4ea4dd22b5495fcd4c466557ea65b9f358df7c73f7fdc8050265aff05e. 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/CAH681410023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b91879517c38278250e4bb0c6c7abb4b7f59156c2cba1e3293ad192ca93a1. 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/CAH681410024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d227b5f7890c102929170ffd0ef835777ccbeca51cd7fd5defbaf103021fa78. 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/CAH681410025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56b563c5f987cb985aa0295332bd4138d226b0c24cd6b1e281c5ecac666a49d. 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/CAH681410015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c287aa3bd72db1e9acb5784e3a101740b3a2a42b987dee769e1b4da8f1ebc3. 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/CAH681410016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee84c830ea06c7705eb707633b5d001d60902aaba2040b415ac956d789949c7. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/CAH681410017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bf01fbc3e944ab37d5cb1f2b728f1dcb6e1f7172bd90be3d576d5cb6918c6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAH681410018.