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 0xb825b81f37200c1c3d41f3280becc1e0aea7d6a1ba3799030b057786ffb2e7a9. 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/e6daab99-85a5-48da-86c4-ba3eba40530d.json and https://artists.proofprofile.net/proofs/artist/e6daab99-85a5-48da-86c4-ba3eba40530d.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 0x24ee5340f49a77c1f7394dc4fea4e5e498c571a684818c87dea2b70460e37b24. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USHM21572003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f3fc8ea260f14707556c9451044dacd4d5c07725c06289581cf6c7d0ff77f5. 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/USX9P1426781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6338ce1b892dc67ae6830015d2108fda194139ce9712b824a073fec24d77c1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX201731863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3928ecce6b9cde6cdc8d9fbc1031eb3963ee4f3f3a5eb6684b95ff74e907e440. 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/FXR592300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1709cc22f946f8db4a1b0b4e7a6be65d63dea60fa9688b92f95f0bf72333ef. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/FXR592300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1a2aaee98334096006fa758e6e8c6a4081afac9926ed136d75a580f57fea4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USHM21541660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eef85737efe9b00cbcdae384345b278ddeb9ba02769cb7eda3367e92d89c0f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1717226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16b8eb460723953f46ac9f1527fb83fa44995df573058e104a47b70ab454c0f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDY41680903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b7b95c75f401952b37660583b2985184f68096f06ee20ec50278abd21052e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USCGH1782798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21984ffbc496d2d684477f8946f6ddc281460df553705256b1a16a0733da1393. 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/QZNWZ2181841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb8dbf55505cbd68dae2e449ed2dd71bf2ab518f1e42a7438f8fd0a3f3252ec. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZFYX2175985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5df57210bfa68f46d3567791d258cd031035276b0edb0733db8c0a11abf8aa6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:44:51Z), 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/QZMEM2060885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620cf74c8a0950e89065cee4e9f7097f705a63fc6e6820d6610c0844bd78d200. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYY2408744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06957bc1f6eb44ef75ba2a2ff95c4a0a7171a3a3a754ed7443d1a3e5c74ed9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA6D22400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6392a4f44630d0cb34e123404732132d58bc8ac570613a64080ba6de440b0301. 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/QZDA72587001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008d5edec4432b279fce113563c81175735eca0b81557f66c0dec42b68128e2a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC2463698.