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 0x4a9c95f2799cc035135b17f8fb987084b0d8f02d9c971a0cfa7607269863519b. 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/feca4ef1-bec5-4c7c-9347-dd3479b91155.json and https://artists.proofprofile.net/proofs/artist/feca4ef1-bec5-4c7c-9347-dd3479b91155.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 0x75e0bc7b41a172e45fac33a075f7c600b44db7196a97e89a5bf8d9f3d8c0d82b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:47Z), 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/TCAFO2156641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca40f19234d845002dce58d362aaa38e1362e1e7c08a5bf2e5b7f63d7c703793. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAFO2136423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39212d982cc338d514b70e3647cc2efee142e2f1ab751d70bdda178a387554a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFO2136431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa366b773cc8fed768239359ce0f6bebe655e530e8727d2b3d22009705b502fb8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAGR2256403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1e0b1b5bba71516465789c7416077f05b64fa7fdb2aeeae8ba7f2674b9cee5. 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/TCAHI2361046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f396b4b1729af2ea2d3d0c6d2f85b2ec5ad5977aa1260d1d62a3f7eb15482d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAHI2361105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2d23ff32714b12482fbc18ba57cb1de3e00e8ecc7ce9340eb63edb0ef42fb5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHI2361133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5969372d244e75db37808457a36382b7e8070fe714657ba43483c971d24f8f68. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAHI2361148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6cd500b294411754b9f1f42da0f889188f14982afa1a7df4b83723830dc1da. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHI2361171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6915f1e66119af9dc4480204fcfc3b46fa91c50ddd8d818cb4524392b4949ac. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHI2361176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9186bddb77baf897f1d29a4b37efd863648913fed5a2a305462fac37da83d55. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHI2363456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156a7dfccb0cdd8e4e084b12f507664812fb39163baad619f15e0c1165fa297. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAIP2410301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde18f2965748fde4d203070c42cbb32f4334185509ca0d5b6e090bd01951056d. 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/TCAIX2495058.