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 0x632f435bbe5c19e51a5e798ebdffc35e56aa994796345949cc16d0b7a71f476a. 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/80ef496e-de7a-4939-a3c5-e52a853f2437.json and https://artists.proofprofile.net/proofs/artist/80ef496e-de7a-4939-a3c5-e52a853f2437.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 0xbbd0dc3a33dc42dfa716f1448b8acc11713644e069f34d89952be80d671c25aa. 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/USA2P2320546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e4bd61b27fb896b309aec24701d74003e8cb59109073593b57a350b57fe3cf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2320539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b79035ca648038033f7ac7d26cfead24d89570426ebe98af51fba120f00fcef. 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/USA2P2320545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060e0ab5d32263b8068b182896a5a9fc5e0fdf99bde9f990dc32915b9ebb2e36. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:18Z), 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/USA2P2320543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdcdac3fccbbd489ba64eb540221bfd266e19f7d6dd57dc0a85e85b68f8db32. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2P2320542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc80783ed2f26118c55dce821ca54e64a347030423ea138cb27bd1f3444846. 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/USA2P2320541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7894fb8fbce233ccb50a6939abf1693d547a2ef5a1759ff3f4b5019e1af68a1f. 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/QZ5FN2119455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55795b062efb245e0d453468cc1ca478e1e6d5d052696017102d25442d892266. 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/QZ5FN2119463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6421a22b3389dc29edd488374ecc73417e39643178da7c9f0567a7e0103cea31. 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/QZ5FN2119468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd77134079fdce385411466253ac8ac10a642e56781e3f09b7e45e40a384e662. 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/QZ5FN2119469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e706159d778b317c2c3d8e1fb3b2b1fb1fac3bc87f56ea021165895d611f9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ5FN2119470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd1ecabb52786ec95042009f2a8624752c8200fb9cf3e583b16efd2403c445f. 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/QZ5FN2119471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31f997f659ed2c39cee8bc9edd7ce6b5227af2e78ed27e8fb40fa0c1c2a7cc9. 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/QZ5FN2119477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8a713398dd8612f3c9b73feff8a5e264cf62fbad07ea4132187c6683c17605. 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/QZ5FN2119481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3c1f8f76ac1be3eb989149ca641a1c5250f2b72a611dfb0abf7e2fff4ebbd4. 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/QZ5FN2119483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1b92c9b58e16e797446e008c16bb281b960a826dba47e7757d9375696ab373. 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/QZ5FN2119489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7637b175cb81602b80b879296655f93b79a0c5dd6b5d6140518f551e6aef4fc3. 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/QZ5FN2119484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277d65550f9926c5edcfeffc657d939e57dc6cd75dab8a1dd54deb54f7e7aa5d. 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/QZ5FN2119451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb138e8ff05f2286e1642b7a50293487860043e3d7c8815756cb0e86d089b5a. 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/USLZJ2117833.