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 0x166f2fc347afc53b59ed0adb016c6ac5efc2a914528ec075ec555f40f3706d43. 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/5e016c03-9a6e-4567-9a3d-d6aa4be04ef7.json and https://artists.proofprofile.net/proofs/artist/5e016c03-9a6e-4567-9a3d-d6aa4be04ef7.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 0x70501da3286093256227971a0b927c67eb9d1cc73b641a2c22b2e303b5f6b538. 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/BX2LP2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4724503553a2d839bd418ab5ee59a3f7f54b30eb0856ad93e9a48cd44bd214c2. 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/BXO8O2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d22f1dbc9257b16c9046af40d729343b1d0adad6062cfb7a50272020655e05. 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/BXGJJ2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3826f3f3d544b5168d4c39a5a85217cc4e2ceb4aa46001b5e1d60bcfecbbed. 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/BXHBP1900367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ffa7deb8f0c62173b015b873ee5ca954b201109cae59e4176d2f193c077478. 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/BXP5M1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc421200d79e5a83f816c9736eabb8d9d18d1c07da735290c35e3fed0ae89b9. 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/BRU5R1800008.
Sentença - Voltech, Eternal Soul & Deep Motion Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408e85d43a7134d077096a6edd3f6808a0a117eec2c3da0542141ef180084efc. 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/BRU5R1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefdaa9bbf69ce946ff550867fc7271bf5d81d1567b8e80fc5fa5383084cabaf. 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/BCPCN2400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2353d0b4bc9a611f1526410e69a9c46ce51f74a9c2e7ea240057269fa9bfcdd0. 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/BCPCN2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc461611ae4c11fb40006d5da15eef7bc1259fc8a56542b4a84362e138e34c785. 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/BX1TU2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94adc58f414b7a32516d262782912d1c42e366c8206b7f6790ad92f51dc60922. 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/BXAT61900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7504bd6a04b3d651f6b09ceea04c0f3f4fe6e70d63b6032ffead204031bc2b9. 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/BX2LP1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745db1d2ac84d644288c645c2befeb44c6c55092c591d41daa03d0a9d6923cb0. 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/BXAT61800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b20b9bce3d6630b0088f28279339c548d0d2dd3de0f6e70008fe31610ed5c9. 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/BXAT61800008.
Música Pra.Curar Brasileira (Deluxe) [DELUXE]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf038bc433983ce45751003d49002dd47ee8af6a3a3d81429f23c742f77a8c42c. 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/BX1TU2100004.