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 0x71745a2dd3d129e353af212f90755defbccc5007e1bb7d86f1206fd40bcefeef. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a881700-3082-43f7-bc51-f53fb55de81a.json and https://artists.proofprofile.net/proofs/artist/2a881700-3082-43f7-bc51-f53fb55de81a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Porgy And Bess: Oh, Nobody Knows When de Lord Is Gonna Call
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 0x08808f3f06a483b22889fdec84276080afe9874f0fd14e5764b5c320c1b4a5ec. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USBC17600296.
Porgy And Bess: Here Come de Honey Man; Porgy's Entrance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89416a3879366b326b430cb6b0e8bb0e9882e17ea096947f13b7aceb71317c5. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USBC17600298.
Porgy And Bess: Here Comes Big Boy! (Entrance of Crown and Bess)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a69e46a7fee1488717743c280781ffa0cda421e67c80cc95de9dd68f222fdb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USBC17600299.
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.
Porgy And Bess: Well, Well, Well, a Saucer-Burying-Setup
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86da62eeac92ce9badd23adcf0bc3c2d13e6c05609059ad9a127e7f86eb35a5. 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/USBC17600304.
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.
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.
Porgy And Bess: Lissen There, What I Tells You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27f52ed39c9bba06d2198edc48f46c2fd486abf99283f957af76df446cc3d4f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USBC17600311.
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.