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 0x8cdceb6845966e4d2f3d31c20c85cf601419156ec4e5f0b8b63ece0e7c8d74d6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc0c7d6d-ed52-4f48-b661-d742246e3b29.json and https://artists.proofprofile.net/proofs/artist/fc0c7d6d-ed52-4f48-b661-d742246e3b29.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Instrumental Hip Hop Beats: Trap City, Vol. 2
Instrumental Hip Hop Beats: Trap City, Vol. 3
Instrumental Hip Hop Beats: Trap City, Vol. 4
Instrumental Hip Hop Beats: Trap City, Vol. 5
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 0x8297abba5ff9acead824f150367c05952442bd63178aef2fe8fc3f191564bf96. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZ22B1832921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f887dc70d3b70e18e907ffb444f66340c1447cf73669f7230a778e7bb16c528. 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/QZ22B1858612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bd42075c47f172cb7d8fac7f30479e7c6f3be12d73b50a69991f997f586552. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZ22B2028175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44628e159115b4e78394ff9a87d4ec8148460e702853736c27c537ecab762b2. 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/SE6XY2104922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6aee4474a35daed99c0781b3f5e1150c315af8798ff01bc3daebefac8dcb8a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6XY2104931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7a509bc60fd91eddcabd6bf87c7dd9b80a55cf0d867019e5d559d7a17db95f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE6HN2466203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad966ddc6d45cd069119ec92d0b2b5e5cb1251809fe26860ffc3b603aed82ed. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/SE6HN2466204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eb5cf5615960e085c77fe14d4545db62bd27a907cfcf16ac3151251e6a47d7. 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/SE6HN2466205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c6a857a14c96f5d3cd822fac64904a6d5ec4b33a24ab841709d504da7375a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6HN2466206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61db4618c11b4ab05d832cc309d377bcd9032030850c75f89930bcdb4b738b78. 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/SE6HN2466207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674aa4d8b6fe7bd013c9aece889b25bfa9c49f2db65c340f82a1931f2a710695. 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/SE6QE2492330.