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 0x537daa19982c1a6ae25a8256d58f9725c55ef7e3d78e4de1bfd0a07955dbe8cb. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b9bd63f-c25f-4a3d-aac8-07abd200cce2.json and https://artists.proofprofile.net/proofs/artist/8b9bd63f-c25f-4a3d-aac8-07abd200cce2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Unconditional Love (Oedipa Maas' Forbidden Fruit)
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 0x86fa24852909698fa25c88751ab50581da54dc228d33363dbaf22f473679c33a. 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/GBKQU2435897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e77d8fc2d38c117fb6feae3799ef9f6aded22bc3a84ae9b01abc4f8b36f8267. 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/GBKQU2435898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d8d0896f5d244be613f9fa227b5e4a0230f6b6963564a56212ea386474fc49. 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/QM7282398979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df82f65119b755c43cde3148ff623121e9a5422b804917e5f4567add24c2e7a. 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/QM7282385911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba25f731ca75a0d0928fe63564e9b115cee416a72401e72a40e401d839120dd9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282385919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664d1fc68f17a6c6612abe31a25197302c609781f77ad1b549349bf62ef70efb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282385930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979dce9401601170fcf7ad2d8cf29005ef397de1b10aa9261c6d43ca07e71006. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEH742180945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae208ce3078b77decefc66881a937c408451b914845430a587ad5efcdf2ec7a. 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/DEH742179216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d2b68be24e4d8979fd3d9fe08b29a9807b2bf07efc968f50c4c8f6ec0de746. 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/DEH742161934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1a735a5610533c0b1be5162989115e7263a6c5b3af42c6181fb8f297fbdcb2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2108540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ecaf7887373ff8f02cb9edb6cdf093467a67f1b287389ca9308396f4662b7e. 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/US83Z2108541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7177af5690c7492c26a8706b92e3ea80e9baaf0b152fd7aec8e2c4f4b24e7e86. 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/US83Z2108542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2946602cf6a4899363b99f366746aade5694d93196f6564cb5732c5c8144c998. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEH742152523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d357daac26a8c9779ad9eed14e8b718da28001c456f659dc84fb36b514d4854. 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/DEH742152524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2d68aeff7f821fe0c6a7349543138576fa485f68a868fe1902cc00bf071f7d. 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/DEH742051587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2513848839c331cf18167401ccdc2820165a97e80c2b80e2d9f78d01a2875ce8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEY471981929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbb87d93691f6c58e770b91a91262a239c2d6fe9f3cf0607f968793682c22d7. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEY471981931.