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 0xb20f0da8a60d593f4ad9a1227db827b3f02dd8a3da0a43d5081c71846f29fc36. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80a38a40-8656-4a8b-a616-e065cdd76d93.json and https://artists.proofprofile.net/proofs/artist/80a38a40-8656-4a8b-a616-e065cdd76d93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Porgy And Bess: Introduction and Jasbo Brown Blues
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 0xce7f48d3fcaea74fb4e1e8c3102bd7b6a6d7b329774c064b6c3d8c8d6b2fe548. 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/USBC17600294.
Porgy And Bess: Oh Little Stars, Little Stars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b551aeaa7f2c6085aaa2594cc19a0a98311b552deeaa58a1bbf623b0d9d014. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USBC17600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af09cd61b5bbc5e31515b54ed3f091f45e5277904ffcdbf908d20ea3368fa2c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USBC17600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cf860774a0c42f82cd27391674c44b17d82be955e986c2eb78f9d216e03148. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USBC17600303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69baff3a5544a91cbe6f70b600d482a2d87500e11a75059646b23b36fba0a7ac. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USBC17600305.
Porgy And Bess: How de Saucer Stan' Now, My Sister?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f73d2099209c967c1505a49a3fb1476d875277820c91450380eb2fe8da40d9. 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/USBC17600306.
Porgy And Bess: Leavin' for the Promise' Lan'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e9a8d642a57eb8a7e23009ff7d991ad7f9792af0fdc5785c0f5b352c88f646. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USBC17600307.
Porgy And Bess: It Takes a Long Pull to Get There
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4107ede1d5893c617687118d8f5bebdfcd6b39aa302951392e723464db4a529d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USBC17600308.
Porgy And Bess: Mus' Be You Mens Forgot About de Picnic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08660431aa086234c9f5738a180e1bc5a45311489653beab12cba848f43cbc34. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USBC17600309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb244a446ec48539deceec26901c5eba4a95e0041d69728fa0447ba77f630ae03. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USBC17600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17540e99326a8d0a293312412d509e7a1ac2af47d24eb29397448a0d9a64c0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USBC17600313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e51883ef91ce17048fb067e8dfb7063d13d44d70d92ddcb48ea492c456b086. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USBC17600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bbb60db7bb3835a4a7c8be3433e0e044b01c75a77345d6d6698df299b491ff. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USBC17600318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3a5cfc0b1c78993dd5db85c9bbbcbfa4e958bd157a1ca3c33569e4f0715d9d. 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/USBC17600320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f72be139f00c2afff1f7f7e38bb2fc7a0ead86a44e3fd89a004f172492f63bf. 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/USBC17600321.
Porgy And Bess: Dance; Shame on All You Sinners
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b4950aa9a7b8d3dcf761082d8523be1fb6f7a3ceb1e2b6e5b05d4efe09f4b6. 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/USBC17600322.
Porgy And Bess: Honey, dat's All de Breakfast I Got Time for
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174a4aba710b601b56abfef1fdf6ef9df10029e7a5ed32e623eb65b0591e6ef9. 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/USBC17600326.