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 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 0x6660727894d9bcc5f87f80981df9186295af98aff0bcd5c7368669dbc6b9c8dd. 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/52b7147f-805b-4eb9-8534-475f4c59b0df.json and https://artists.proofprofile.net/proofs/artist/52b7147f-805b-4eb9-8534-475f4c59b0df.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 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 0xf083496a3b4ffd3e1ce8139c05ebac7234b7f47f2defb3d279bc3c7a14fae996. 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/QM6N22327483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56d8bb99d011b8955d0cd7c7144a5b46ec38851d199dc66506b51f645ff054d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTVM2385758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d71f41167dba20c944dc685390361ae0e03889d591bf3d00627abc24d4ddb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJY2454562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b968098558ed40f5bc071d57dbaac01c0b3e83bdc5dd7aad3d9fc0f8903a5f0. 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/QZ2J21507411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa072689c8bb02de7dd9986e6c35c6759db515b5b46463b5366375291ac1b16a0. 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/QZW9K2437878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a1581192072f64f987252383ff912ec9bb001e61d448f5b1f7bf4198b7fadf. 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/QZW9K2437879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7278c162aca4e1aeede671fad6f1b4cf2e90d938e76edcf9fb34270abb9289dd. 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/QZW9K2437880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce8dc3ab953a38df5f844330a60d2a890d3d7295bbba9c45e50b31f0e34cc22. 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/QZW9K2437881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98042541b4a02fedd31c7c00fbf581365110441c6a66f4a73716b46a17e15f05. 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/QZ2J21508521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87fbd26be800fda267bbb6ef80fdefa65205dbb1fbb649e43918c605443e599. 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/QZ2J21507681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7ee8634ac3c2b0eb0374216089f0d5c3d3e70018bfab63b353667dd64274c2. 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/QZ2J21507607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ac8096f83d378de0ac9a1c1458c0be8123040da62180059326c9433711a04c. 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/QZ2J21507548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a9289b5540c0aabb621327b9113d01ba41025c48801148bf0586935d23dec5. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:50:17Z), 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/QZNWT2300629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e125959a7c8e5bba70943b8a4a8b422db8f6da07208e49eecd076dc817ecc3. 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/QZK6K2396769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9531e34c64c960e1935a3da23f5f303e6025f37f3f5f8e717b7fdb28d7a2b2be. 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/QZDA62398620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e794ec349439f3b9550bda9986666cafd873508f9fd157e30123acfb3ca85f. 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/QZSYP2381230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c03377ff8916d3f68074bfe3ae5ee113430f377049ff60db1163c2617e46965. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0Q2343152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4782c1f9d61114c6c8bb4294dd313fd693d0b5648f42e1b9bb9b8de718a9dc68. 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/FRX762464490.