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 0x2cad8e70e24f813513edfb945d3c114a6c45f87abf5bcbabcf5a9fe465357756. 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/1553114f-2a3f-4928-922b-2f81b9a4c968.json and https://artists.proofprofile.net/proofs/artist/1553114f-2a3f-4928-922b-2f81b9a4c968.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 0xd48b08f16c34e3e6e85cf4c6ca97ba323ce4f81e4bedaad3f67247fe93620b45. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:43Z), 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/UKR6V2116670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1130dbbdac321fe4a357008373e1fc6a3c11d80a22206301f1187fdfac03d595. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKR6V2116671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e67948c8090e0b20c34aaee1ecd6a0333d7c6302ff08649998cad2e43e7963. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USANG2278536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd5deab866cd271665c955e2098e942ecf8d34bfef9508f21fe61eb85dc8e76. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM3DF2219184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e625030598dac0d78558358110ac8cf3d0ee7895b8ccedab87b4eb87495280a. 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/CAN112400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6814819cf8d423cd71fd3f03cfc7ecab9382bcd650d6313d79f7be2b8193b2f. 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/CAN112400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2c46c3beb2ab28c57bfbeb2cc63f12616b36bc1662f46a0021e011306dd39. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CAN112402171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aea7a6ca5a0fd6275513fe6538dcc5ba42a61e1a4ff6f20e14b716cdb231038. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/CAN112402477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d3b21e5c9d2ee87b59bc364c93fa3e88c5d665b0bfd573bc9af08cb944b157. 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/CAN112500374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee033635aff306fe0812a650eb99a3a0b41a944ae27e734656df3e7b8a160390. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CAN112500362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a566b27278b64556b4382bc1d9ae94fed67713b0ba2e16ac040d91aa70e8b1. 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/CAN112500407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfd711c08d83520aa596a09e2ca9b7e625015b1fb97bb25c9753fa78226d540. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAN112500408.
Make No Change (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925ada8d14b59c38123b88d7be361fbcac9d5f3976a7bf5bdff0760bec947045. 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/QZPLR2557432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8096a4a0c45da6ee73ec36fe30b54db511bd8bcbc7f940187b5bef99b1956e3f. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:52:46Z), 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/QZPLR2557434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc32f5252076fec359a5cf3ff3a231ebac64903f646ed3e631f304c4dc88234. 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/FRX762101687.