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 0x14e6c93cee38347d1c9ae1db4cc6fea4197ca0693203c810d90dea0c8fc211e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5b7f8a4-94e9-4843-8389-69ada8107366.json and https://artists.proofprofile.net/proofs/artist/a5b7f8a4-94e9-4843-8389-69ada8107366.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 0x4777ff6625b8862b12c97f0b12df89731508dd0566a7806254d23a1e692c6f9f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ7R2457500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86ac66238de27b7d789c0fd042a6411ad6607174069d333f7084625b57459ab. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7R2457503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a92804f45f624173035e156294a5f4d2fca66852572608f294f0ec58e54686. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:09:35Z), 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/QZZ7R2457505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f900c06ed12908d000564200f31ec37446a0d27ea08be96e7eca77659b398e. 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/QZZ7R2457506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f99a0c15c8eadb7518a85a8cb0226a5a581765d19f361b13f3788a097a671. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7R2457508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1da8de0fd4ae3a1d34d8755af3d25975ba85f0eb6296308b9d74ec22e11042. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES92523145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f78faf0ae56c6239f202d34d3383429b1f15705a4c54b10121cfa794c9fb5d. 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/QZES92514801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824d7e424aa41fb430a39397afcbff8e25b013d56ce83e4a00eb8d2594078c9a. 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/QZES92514803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09899524bda40643ed7ca857bcaac35a5d0bf30065338d5feed0555d1455dd8. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:18Z), 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/QZES92520318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0c4f9400ffa061d55d9d048be02b89f1f8c62ca26ae9097a48d00a69bc35ba. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNA2582040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e35bde1e1dfabb80130cda061235fdb2a1cae1c0f2cb34e973914d9cdc719a5. 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/QZHNA2582041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e52eaa65d0562012e9d20f26ea15f8b37d9044b32b07e6f46e59ba70002ec99. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAX2513416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bed1fef59f1d3788f399b46eb6b6727f51779963cabe560ca2edac85677340. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAX2513422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8458487f86a2c69c8be3af0f3a38591d8ee512cded26e9389c64fe7c1c1d8203. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:43:29Z), 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/QZTAX2514842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2cab13a2c3ce12ac2b5929b67e5ddfd84356fc4943ac31c9126eaef3da3c5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAX2514849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8a8b21d6b8370750c75c6352cf4e089ea9c1cfb1f75a3fd7e5b03a685791e2. 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/QZTAX2505835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994fb8c9a85ab0737b5ee3188b1a6cad59fb9ae356b2107d32ca79779d3a3a96. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:59Z), 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/QZTAX2505841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48438c90530fe31bf8c0251c60c26eea76055f9f297e2ac492d231028a72691e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAX2505842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aebb6373653e60ac88bf0a2e9af912974b738c02bd281225e2f02d8a7ec690b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAX2510626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7897692bd710454ac72474f32373e779e7a7e40aa744e9c28d8d4163b1fd229. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFT2547918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3475de1a2fe2581ca61c21146609ef7669eb6ac4c81471d139b864cb0e97f15c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFT2547920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771b554c7871ecc40259316780eb3e148d822a4a34ab6c6e3d0ab59999e489ad. 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/QZWFT2550589.