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 0xf5ff7d19ee4397882af85f7f3250257a4d2b4620f2ca5e4d087de034884d97fe. 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/09a485d1-1f65-4bf1-9212-cd43b82f85f3.json and https://artists.proofprofile.net/proofs/artist/09a485d1-1f65-4bf1-9212-cd43b82f85f3.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 0xc2707467511733c337485418da0052453d62104fb50411437e8af82d9e21bedc. 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/NLT2H2201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a8ecb0c353c56a5b0fc49b56f6563efaf3ffb3d1712dfb8a2dc76831eea9fe. 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/BE8LH2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e82431b6782fd4772c32ead033c8eb8e38aec56d5124775e331ecc3383688d. 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/NLYK92000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160651cc5d187254bbb812251e70a6e6ec459675a97f7c9ff1f6165fc941f007. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM4TX2199161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d6d3ed9140e311c1dfd47e34e4011458c41fcce638a660cb211a27ee1950a. 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/NLYK92200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85fbe7e92ba170f445f0939c20077398c20b58e92134dfbae3e6bac19f0bb9f. 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/GX8LD2317021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc7e220e7f9a23324ee48fd254c98b8ece5521211a01d90f06d072c7ffb902e. 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/NLT2H2200642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a483cf7a19a8721974169b041fb28d1b6a87f0025c2d827603d47fc6123d06f. 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/NLYK92300181.
Restaurant Lounge 2023 Vol. 1 Background Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a8ecb0c353c56a5b0fc49b56f6563efaf3ffb3d1712dfb8a2dc76831eea9fe. 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/BE8LH2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d76eeb3215f60efc9401a5cdfa30b05023d9b0fb75d262dd791dd411eca94e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ATBO82400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77ad2d049e32904bdcedd0fe58c48fe0a73c4654c5e2b7ee48aea7fbc9cc4a2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATBO82400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2add3a39d0594d77f9c92cb447355e7be3131b97099b8a8c94bb3f69a0416776. 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/NLYK92300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baf7f9acd4f8741cf136c8312dbfb789030e53ed537ccedf850f1930050c348. 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/BE8LH2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c8c2210ef7761d3cf08dd7f229f591e6d5ce5edadb0efc427e33a3bd63dbf7. 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/QM4TW2075248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9d89aacb6fe767ebd8e5e2b812431f3919e638043d8684722f96ab7a3a7e6e. 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/QM6MZ1983095.
Restaurant Lounge 2023 Vol. 2 Background Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce36bbd7d41d596cb27fe606635f7c175f7bc38d4f2f5198dcc6de9120694b39. 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/NLT2H2300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ded86bea07468a7b70e2116421db5e5a3bb65e446c5e181ed0225aacad01f. 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/NLYK92400294.