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 0xfc04d52dbc2c0634c7d56c5b3f19acbd3bb05c8e9a75a25a692a4478feb29092. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/006442f3-68b1-4fa7-98a6-7a55800f3ffb.json and https://artists.proofprofile.net/proofs/artist/006442f3-68b1-4fa7-98a6-7a55800f3ffb.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 0x328a9d23a66a590cd41b47616fb938dfba36b7e70f8ba02cc567310f94bae177. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CH6541744144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1623fafbad26f6ef3bdeb093005935e906186fd031ca2fdb4b67b17a1d16e6. 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/CH6541702006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0c4ba4697ec4493fb11059ece59d386e34e668c4b34e33b6ee6419922c3e97. 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/CH6541702008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b882ecd8835ebd3fb01a1868050dbf4cdd4bdd323d8c34428afa6efa64f5f87. 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/CH6541702012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd023a1399320a58172625ac986f90da59ac7d4012aa411953c522787423685. 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/AUMEV2424696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef64248c485e7465bbeda7418244529da29ee7f66499c64da93c4b553601d8a. 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/AUGBT2302060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b0f36b492e8cb4d69cf66a3185feecec2be1c92b91124d8f3dadb401135fe0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKR6V2310284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec22a6e6eead04a84c55772c5f4a5cf9c0960d5cb6b390f2a9f6e9325bb3334. 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/UKR6V2210385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7f05e4876232cc8534a31be2c4fabd38bb2ccc4d3f61fb048912177429972. 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/UKR6V2116995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c83507e8bea3f1fddf95153a8e50688731a271d0b322f1ac7c809ad46fdb4. 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/NL4NL2121858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7dfbf3d8892dcf07964404bfd4711596da456284f44ab7e9fc3cffa3debef2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CH6541933819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa153e7908c71f6061e036600e664e525939ce62e5c674b1e076934ff372ce7ce. 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/CH6541834214.
California - Summer Feeling - Piano Solo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aacf5bd8b2ae3936a7822c5acd1831d15c12b1f15ac8193f4fd13367f31095e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH6541821707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67437a45cd12f875b4ca6611ac20bdf3b6379278d0d564c17bcc14c653f6009. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6541626913.
Dream Chasers, Vol. 5, as the Spring Comes