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 0x5bc9e4db188bec7a577ddc69805d2c949664d7bc44a0fc376e7ead4a76d172a2. 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/ee0651bc-716e-42c8-bacf-6a342413e6b6.json and https://artists.proofprofile.net/proofs/artist/ee0651bc-716e-42c8-bacf-6a342413e6b6.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 0x65a4683f893476922014c390db0109b26f0140ec30251780f7eb5b36614973dd. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBUZW0800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e297eb38a6c44bfbaba3a3781a0a11a8fc6ee8a48872e125115f8427057ecc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBUZW0800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415697d46ab0ce0fab4c6c305277da95bc8eed2b7c833ecbc536bc958193af5a. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/GBUZW0800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbf40879fd65c994837664bcda4b35748d10d20c41dc9fe6a8c3f20238c65a0. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GBUZW0800212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d984e35062802656914b7d04df83354ea77c865a10e3c915df3075e3e628c9. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBUZW0800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d90c71019ac52a4b9d76422acee5ac506c43d5c94825874b8aa6d4f69b1376. 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/GBUZW1000385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156e84aeb3e532a4b650d2cbeb54ff08f6b84097f4bc1b16922083f1d621a981. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/GBUZW1000386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff9f47025fcb52043391bb347eb1142bcf97d67e506a998feab2241b8f16f6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBUZW1000388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814da9951b87555b4555a104ffd9d28722faab42cb5bc5be722286f081c86700. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBUZW1000389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9970a351a4cf343c2729d4e282a730d3937bf9c8624a31e52819369a0c11a196. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBUZW1000390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579237d3b688d9cd47c508593ded474adeaa3d728c1b0bc34104f995c6bac0ba. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBUZW1000391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212f733e590142a4918c3470ab2cb927710fc5ea10cdd64aba52fb10fa26162f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QM4TX2280033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89da42d90be332a94c05da624c8f8b5223c0a5af0bc84cede1fbfaa1aad2dde8. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QM4TX2280034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae6ba244e51cb5bb90141810bb367f3fa0885e13ebacee5d6433f70dd92bc32. 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/QM4TX2280035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7412ac56d47ba969f6d2ece0ef84a8c2672bfc9ec41ed21449fbd98796d4dc. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QM4TX2280036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520585b452ddeaa2e2296c77c518f008698361285d4794f0f8d64919312ba155. 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/QM4TX2280037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb339e4eb70a13b8da9f9e27288b96808dd86ea1cf7df208a59af261719c4bca1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM4TX2280038.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9145bedab9d4d483596b349214af684c98620b10f32c0bffb67a1ea1152da7. 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/USHM90547583.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13933a240c54317350296d0372b2256efa8cb2d611b89afe880a8b7b3ce6ff43. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBAD20810131.