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 0x4f4f3cf62d783545e309ff43a336c6b54f8576605aad757f3105e5480a4f2307. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7470f755-00b6-43a2-a07f-8846f17f2243.json and https://artists.proofprofile.net/proofs/artist/7470f755-00b6-43a2-a07f-8846f17f2243.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Last Night I Dreamt That I Met Phil & Don
Last Night I Dreamt That I Met Phil & Don (Slow Jam)
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 0x1631de000faf2b6f53a3b7a1f39eddd274a81738dd3bca31734090d92dee2c74. 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/SE68Y2500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1631de000faf2b6f53a3b7a1f39eddd274a81738dd3bca31734090d92dee2c74. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/SE68Y2500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b4d08e0948cc28ec214071043208e208f14e2dc0c539af7764282021e8a74b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE68Y2500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b4d08e0948cc28ec214071043208e208f14e2dc0c539af7764282021e8a74b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SE68Y2500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1631de000faf2b6f53a3b7a1f39eddd274a81738dd3bca31734090d92dee2c74. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/SE68Y2500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7673e5f1cf2564e4e43be389a77f364d59b20a7716f03eee34661081598d1fb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE68Y2500311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38e61d45fe97ba45be249ce189002d8f5a8d4494a9147f66d8efbd5afdadb63. 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/SE68Y2500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1631de000faf2b6f53a3b7a1f39eddd274a81738dd3bca31734090d92dee2c74. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE68Y2500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed13c7cefceeb34cf40467820eaa64dfcb9894e6ffad2bd06cc787f30c64c04. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/SE68Y2500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc347fc53ce7e401e80cfc6bddeab7882bc1b78ef70a5bd31a040f5f7ae941063. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/SE68Y2500308.