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 0x98b2224a4014fec5b6cfd149252a6820000c1a32989b59949437542f83fdc350. 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/e2370371-15fd-484c-9264-e6f5f6a17673.json and https://artists.proofprofile.net/proofs/artist/e2370371-15fd-484c-9264-e6f5f6a17673.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 0xdddc99f3b98693fa819a4dd702c6d2977402f5cb6e33ef8b95e3935785f0c79c. 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/US66W2201309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9755914c95ed4f318097ed25545207b52e59e776b1812b5179d71271898b6fe3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US66W2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f484df71fb1523212fe1f3808670629127cee5f3ccbed006a7318de5a0212. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US66W2200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a73af84e7563a90b87d540f861304bfec8a25f3e914c267c55da202614227e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US66W2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd364bb4582df13f328c70ce7fd4cf618b9d755ea1b0e5e8390c8f6d3958682c1. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/US66W2101560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c126650df8e7e6ed4e186fdaf90bb19619608e4deef850cef5a8551f4ba17ea. 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/US66W2101445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ab7092374c2cf7c3721cf6cd8a4b1a6f7f3153a40d9a072826a269603dc597. 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/US66W2100992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5a30fc8ae33d19d6c277ae364cd45341f32b323705a3a2e3e2bc6883bc0a63. 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/US66W2100945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860002e46547d808d9245ca590d660e34a77c4a89d2d5f508bd29e2855157173. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/US66W2100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d770cccdcca99f842262f9aa4254079629214e4a0d7de97134e2df68e749f2. 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/US66W2100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9726cc85ff7abcb209f67cfe89f84edf5d1879084a7b9f17ff01dbeeb200689b. 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/US66W2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859cd7bd11ee1531d19ebb647c89f5e52ba94be729b51e6b3374896582ebb447. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US66W2101459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1659608a8444d02849c77c00741be495726c13589f2e0a03c4e58bfdfd51a36e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US66W2101448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe6faff8b650c8f75c14310d35c57f4b6692bbf4555a5a96ade4a58e20aef52. 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/US66W2101439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc609123b0b426e7262552bbf299623809bd9dbb83904880e08daf9fc8b694bcc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US66W2201339.
It's The Most Wonderful Time Of The Year
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7908db3f39cfebc1fc26337c77ddf460915a8341c101fc49eb86538d9a8dcf. 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/US66W2101443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f754e0e26fec621a966d5bafee04a4c22b53cd5348cead4c1611ad6ba2a08c1. 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/US66W2201314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6b47578e9dc973e8d3653abac661abddffe4f509b3054bd730727a3a39b7af. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US66W2201318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddc99f3b98693fa819a4dd702c6d2977402f5cb6e33ef8b95e3935785f0c79c. 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/US66W2201309.
The Christmas Song (Merry Christmas To You)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf434f04039fed6a93b17b896cad391731884066905953e542da0f46ae2252934. 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/US66W2201316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bab7ff436c679920fd3e792e9e3ecce018a0aec6d9b56b9783da9a973adf7f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US66W2201347.