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 0xbad998b6c9c023258fdb845701f3abdfe372942dba7fa28dab652926ec00be3c. 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/d689018b-4fe4-4ed0-9c9e-3a22849a8255.json and https://artists.proofprofile.net/proofs/artist/d689018b-4fe4-4ed0-9c9e-3a22849a8255.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 0x69a62ab1ca6d52294af48eb8a012e91cdd41fe1e96a7df70c31fe3b652dd5e1c. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZTAW2448979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c33f448e2759a9a8daf5fa8447d8a16e381818c53d2cd908c5e4fddac01ffb. 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/USCCW1611161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e5fd0bb5ba8bdc38a0083ccf8f1c3b0125b84eedaa4ce9dc79f9d24a66d69. 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/USCCW1611162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324bcb9c41caddd172f0bbfa1b5e4325a661334262312ef5ab412c8e05f1bce7. 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/USCCW1611163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d341572db987f0c49794a58f85bd2d9cb400d7438a2b38937dd2cbdc086701. 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/USCCW1611165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c859a3f885d27d458226ad7a870d906ae22f237ea4754991d98848b34b0daa. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:00:04Z), 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/USCCW1611168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c6331dc0af09adc2a5b058464d00fe81ce5b88d2701d1c205c6e63203ebbfa. 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/FRPZ92314430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361d0220d16d0476f7dc7e003e58fc513c27d0dfe2f2aae48a308897c2936264. 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/FRPZ92314440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90154483dccb9d37c68364ceae870bb4e23b688326a9b0e77bee9627b9b00ee9. 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/FRPZ92314450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99e95503d3338daea4ef8fde315b4c38628b178878c85e5cf2a03d893a450fb. 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/USA2P2043972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298ba794ad9283e46af96e6195bdce09dc9b454c27bf5d898a264a19c6b1a1a. 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/USA2P2043966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb63fc6075aad675e44d0bc789db0ae2b8cd40a7a88362dfb97f8a00b26753a. 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/USA2P2043971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb494d9f4bd975a0471b54dcd692e4db30780e0e6d3be02c1fb0eed6e757688. 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/USA2P2041521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8087b2eaf3d7e97a685ea40c4d426ae504b7e030180c5ade05c11f797c4fad2c. 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/USA2P2043968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99e95503d3338daea4ef8fde315b4c38628b178878c85e5cf2a03d893a450fb. 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/USA2P2043972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05930155a4921fc9ba3bc74fb36811396c11ec491e41ab17b73e4a1931e7ef1f. 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/USA2P2043970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4f2ec424f0cf2864edf1fedac8d7bb1432467aad6e1cea5bd5792db7855bd0. 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/USA2P2043965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833b282b0122560e540d335e792cdea148cb46397f543d6d96955ec8dcb9d01d. 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/USA2P2043964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae2c809c31ea6b9fa6fa2ba96e7daef731338df57a0e7fb48d6656e62b8907d. 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/IT0312200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3218d8cf27d9d247b20f66d93b5cc0a2e9265bedbe748292ebe72af2bb9a35a. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/IT0312200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65938111d26a63f0e2a2c57354d111c571436815ba9261e677d332046df0db56. 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/IT0312200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d10169608fd5e54371ea25856835756ff015169981af2c0279839bd857d6b8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/IT0312200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c109833fe15f29f2ed03fe2a32074753f3c08385be9ba19056e8bdd36923b69. 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/IT0312200104.