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 0x198a24acfd98479688a369da2aff8924d5cf647f58b654fa6f2aef51f18f9c84. 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/2a0736ee-82c3-4073-8fdd-96de351d700a.json and https://artists.proofprofile.net/proofs/artist/2a0736ee-82c3-4073-8fdd-96de351d700a.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 0x450512ff90c769a4fd7c047e72facd97714329f00f1294ea4e325741fba73ff7. 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/QZES82169921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb685c17bb36a6d9c0d13f5e79a645962cc4d939b595c623b01afd5943cbb39. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZK6G2068925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaffa63fa955247a23461aa0d5641b4dc9ef0d65ab3cd85bb60e3c7fa61d39a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2037285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41257ab33f17bef0dca3b4955ea3f2e00f3b2357c205c50341996b45208dafb8. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZMZ92295475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b18a9d394473f0932be8d29e44c9576f85021aec6aadd008946dc627a8611de. 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/QZTVM2357013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5346281bfff37899950e00de6b1757c557e940c5825a05718f8b0b51810997b. 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/QZW9M2328705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353c297fb081561d66664630226c620ca66ada32be8df4ca5ab322107b6a0fa4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6P2406446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b00e7b3a1bbf6f8048e3829acbb4db5300b046dd5846a3a223cf487b2262ea. 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/BKP9L2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e90a350e30ffef293c2dba5edb284ca87e14d4bc4139ac6306d3c23d06a270c. 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/QZZ8B2490679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6c4329133074d2cd3bcaacb29e14ac9964b09fd7da546745ba99ddb7d88cff. 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/QZZEB2416314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23028f0bd67c3f758d3d27116e092dd5677843c92db646541d566ce1b9094de1. 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/QZ5FN2593675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f24164dc60a6e1819949b174af6b7db1cd264fcb95a06db97006eeaa0e99e88. 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/GBWUL2574547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc125e8d03728d21b3fddc34fdebbb3a4a82bea935566a5a6c25bfd019180df80. 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/QZTRX2517490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe58bc313344f0e259409fdc958ceb915d14122e4d9686db730f3b5624a57a8. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTRX2517508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882c60772a1e44c1314357793b8a6735f65ad615018ea3a780aba616628410cd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDE2564000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1acf34319b9ac1259f558f2c4580d00e2d3f073dff442b24954e04a1be27ff. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWV32591510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef5d2ea2835f2a607121b49062f63510b19616e38ade9f8fb9dc14f2280d53c. 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/QZW9M2213623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91825a08b3a3364a934e1be8b3cf5258c19b4ad58f6f32644ab92688578ac8e8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2471627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934748854e300de098deea7161413ae2281887b858d7cc089e307874336af65a. 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/BCX6W2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e13db49a6cf0700de5e6bf2334081301bf895487fade1977f513a4ce0d5ee4. 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/BCWK42300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1693c5abb2a19b0b7c2df3c5c454321ff6556705f0e2ff6ce7afadba192a50a1. 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/BCX6W2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc371781da171e59db50fae2b07b5389c7dc2b41c97d6cd67baf0a74027089122. 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/QZGLS2439722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd7d876de714b69899fb4d814fafb306456a56a0dc50ffc83e30a85f91cc727. 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/SGW502408094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59872cd855f937555f25c7932a4acc0b1d9206b8ab022c66420aed71d5670564. 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/QZTVM2366206.