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 0x3dbaa00e1e6e5099ca5a45baac42cadb0c8e1debb76f0616a6846ee8724ab5de. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85ea11f7-4505-463a-acd2-a77660179b07.json and https://artists.proofprofile.net/proofs/artist/85ea11f7-4505-463a-acd2-a77660179b07.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 0x524ec4d791b8b8ca4017b117dec4cbf3775f3b9c2cc2e66703ee84a7fe45ca0f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAFP2146252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288a4f9eb2f193520a8091dd14ad32421df8625dfce4ea1e414bfad3db82da89. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/TCAGK2298915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbb75b0e4d94855dc4df382fd652d8b9674de3514217a96ce5a139c914b55c2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGK2298923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aa3543df5d13efb1cf7fb619dc0b287350b93d63436207db7249f23b3533f0. 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/TCAGK2298932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b851120a069472cad668385fac83b33974fdeefd4fe4935921f05cef001709. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGK2298939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30a5f5f4848186af600a43d82c424055ad89b4c50c9895eebab5e701888a990. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGM2265520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fe45fea90d595d6707e9bb6ac710a04f2982f07f693489b0beed209ef23174. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAGM2265526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ede397a1a409502fd1aa9d2cfd9b43d37371de6a0b29e1c5ae459b6f76104ef. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCAGX2322109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55828ac3ac54ef3d5b4da02e53c5baeed1432ef7957e4af76ef67dacc87025d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCAGX2322113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa378a1a5a6b47923f27a6ed1092d81206896effa34c331922492f54843e5c461. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAGX2322120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b9c33f7d9d28429cbc05db47b3006ecffa886d974262e653cb333362d9c87c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGX2322122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b10aa3ab6594a14d832163ada66b014b2b3ec67b46517d116f09c8227b709. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAGX2322125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752582d0cd81f37fb559e270419c5b193c199c66092498ff9d87d840d9ee0d2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGY2355995.
Boom-Base, Vol. 10 (Back to the Streets 2.0)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46260875f9ab570898a6df9418765f632e8badbda64c532e2987edf1a5270b23. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCAHL2315877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fbdfda281bd13206dd2d3922deb6873fd59b5120c2c1bc96b1cdb9720ec3f2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCAHL2315886.