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 0x24ecf232fe8c0e4ee3d0de0d4879fd979501013fa1f25de875806166de5ec5e1. 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/6a9ff98f-bae7-4111-9bac-caa02751ccfa.json and https://artists.proofprofile.net/proofs/artist/6a9ff98f-bae7-4111-9bac-caa02751ccfa.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 0x63a254e1e397a5b2c9bdc1587bc82c045f813c951b8eb809960aab088b5e6350. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRX201603324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fda531bc0c150115ffe4ad5fb4074ba042e5a26f7f2b470ed46ad016624c8d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FRX201601338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703f05d39cf49ee415e83e8e4265828f6127336e16e93c6426f1669fd43c1e02. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX201601340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a39b51325f9c44ace80feee75682a8ee9e47e5567ed2bd5606bbf121740f99. 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/FRX201601341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae48b0ef6802e2bab28503d4e0e0a6bafe5c43b62925e736eced3265d90a047. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FRX201601347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab07ed197291ae8fe19585bb15879f595551aeff499da7957d289481cb7aece1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRX201601348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d8b0013f43e0378e9095b77d7883c06a690107941a2be97d8b602743cd7692. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR9W11720729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5c301675d7eddd1c5e04ca0d530a879ca507ee26ee90dd845d01ee87091083. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W11720730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520bc7bcbab3eefc659200547077bf1da216da0eaba04393e31e983cc67912e9. 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/FR9W11720731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b5737d6623a0f1d451a1cc7c452f30fa37e2cd0c032e6054ace821e3edba99. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W11720732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239d7c287f74a7dedaae95fddb11e04943a624666d269cc0fb2130c6d22b1807. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11720733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc088b61cd240846e164cd453dc847a1c97af3fa066c5a3fcbb83e692d98d64f5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W11720734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19524ce47c753542c1700b5e0fc9d7176661e6853ecb96b737d827a56fd617e6. 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/FR9W11720735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ae2094fdc594f13558f956f796d96d86295fa8189db8038be0a015acd1463f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11720736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f022fa75459d2751704dadc148faf4a6544edb823f9d3020b6128c7a974e208. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11720737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ef4723de39812513717498bb4afb037289fabe26eecd9e28e572567fe83757. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W11720738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88175f34b09bc2a6d37326a0c847d4e165038e3f86c52f8a404f093c56350a2c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11720739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a31a29851ddc43d716cbb085fab1810c3ec7bc1198454c96df650cee18f7db. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR9W11720740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6709b5e9f9a92382726f222916400c177a6f4a7ff53b010dcae91001477e881. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11720741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8de1784cc002eebcad4bffd4d8d75a276f33b8a59b6203a49312e05c0c5782. 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/FR9W11720742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343d31c6ff9a1204f7561488c7e48dd083fa1603f8532b907ee7a28d4ddf4da9. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR9W11720743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafb6c504edd6df40c276bb945596b64dab0b79e08e8078cb4e64b022ed8dc2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11720744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b5d35cf90b25b4b1a89a7aa2598fae786bf25fc237c0b386ad84c791eb229d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11720745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8486a0b1f3e3ae0c44783b4a331857f8d67bc41286cf72c9cc1e4f78405cebcd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR9W11720746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19524ce47c753542c1700b5e0fc9d7176661e6853ecb96b737d827a56fd617e6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11720735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cffce13b9066bed6352054f69be06454793ef6cd3b0ea09de2ea1d58a12fb0. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR9W12137479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d95fca918007fc8d39f9c5d69263d2e91e3a3243dd4ec841d62284e506ee2b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR96X1649951.