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 0xfa4c9afdc06f07e74736008310487d6d83bf7197c7f0314abbb561b341709eeb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b38535c-a794-4660-a0b4-14f6edd40c65.json and https://artists.proofprofile.net/proofs/artist/6b38535c-a794-4660-a0b4-14f6edd40c65.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 0x334944c3317620d14f9db1dd30b68f8b6a0ed257b05b69659c22b0a443b4f5cc. 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/QMFMF2300986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9429996808c2f7db231b2dfa3d53421a4f6717d53801010111a93ba97d9ee11. 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/QMFMF2300987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7d18738a1a963aa93c6c03e7f60d788578de2f8e4cbbdc0ee9a6c6935b58de. 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/QMFMF2300988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a19eec8ddefc12fe293311a9b796ffb43de80efec717f3aee0dc81e3e8a51cf. 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/QMFMF2300989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09d46884ebfae62c044b240b842bd176b07b34705006112f6051745f205efb5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ba86bf15dade12a9d4f6e549e77a7556127d72a4069d83b444c61bfe3512cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2300991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a282dd9c27e5877bf9bbe4461da220b498cb4d7c0caae08da487f6683c971a3. 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/QMFMF2300992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b2f2ff96f067ff745c096f6d37de329048e4b3b514ecd7b04a645b19f232d8. 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/QMFMF2300993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b0c5e7d130269d1a4caf9008851360842e1dcc211c688c6750f34a24439595. 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/QMFMF2300994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0814702f8dec7a039956e1f7b1005a20ee1a9826d929d5e268d5edbdc47b22c5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217a8386446c2ffed81e83144755dbf7c98a68245830d9ba15151508345dc39f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2300996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912c1dc1505997f74b1cfbf9fa386578f74e3d9398d2df50df5b74306646a42d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKXN21927128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d40f379f675462d5f5127e422926dd9c106bced5f288ea91548674571a327c1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN21928942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b22f659cd03a6187dfa81d7137a1d6390cc68ea8e905f3bdd7aefae75d5711. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKXN21928941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53c744893174e804aba2da2898be2aed50a2d02a83601e61183243a39d09ac9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKXN21928940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf211138c47d09d99bcd2883d71064fe55ef20901036a605e38bbf445fa74129. 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/UKXN21927131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba0d2cb13c9fd10f27a117db990139a80f5b32e22d7bfeb1afa688c848804ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN21927146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d241691f4331eab9dba5d9944cbbd2332b5e0dd570674ee46302d7fba8fb190. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN21927129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fb118ceafb1ccd3dcf7894b200bb2d4525f5a35a6ea0bc3a80d24350e0431a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKXN21927130.