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 0x164e37c7ccbb49e073c51d4ba6d904867c1c7c966bbaf95118ae14f4f0b085e8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d30a1dac-33b1-4e5b-ac53-829f4b30004d.json and https://artists.proofprofile.net/proofs/artist/d30a1dac-33b1-4e5b-ac53-829f4b30004d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
PostMatch - Lo-Fi Music (Inspired by the Rainbow Six Siege Game Universe)
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 0x8d7cbc814317f113f5a0f39c000c55afee9d8992289773e0713f78693da8f504. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/CA2BN2103263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2954be4c27d93b351dc36b040ec59e79cf2150e45886599d4d517da14ab9a20. 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/CA2BN2103264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad8637dabdf9e2eb89511319de171f8f6e3c3b8839f777108fb4916a9c4ead3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CA2BN2103265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4fcf1e383601163f6cc017f06fcb4c05055f2ca9fc47aea5a228f8880db7c8. 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/CA2BN2103266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83579fe58d4152703cd675805573b68745588f56bc118efbb4e751d9d1c4f555. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CA2BN2103267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789f7b69701b7175dc42a997c1599eb284e8024cd1e0032b72b5b8256b9f21f7. 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/CA2BN2103268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67005d15f51dfe3ccf0b3bac59a749395b3bb041f834f9de1276da69b387fe2d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA2BN2103269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a79cbac1e2c617954c1b30d0d3cd880e6233ae64a24dacff50507a382ee093d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA2BN2103271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa30cf5061e238471fc385f1831cc525fb703c774938a7fcec3473bef5ef76f6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CA2BN2103272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9543efd58c14d387885db786ce215ab6c3679d877a5b34f1e452e8e9c1bfcb9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA2BN2103273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a29c28de7e8fb87ecbc5df8aca4efca561c520c774d7c2c74efc8d2599db77. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA2BN2103274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2658497d92fa904ee7776c5bf5059986456315e6a63449b8ffdd0853b2c94523. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA2BN2103275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417fd34476a96c51a64e67d082af5a3e9dfb4f93055da97375aad528212a5433. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA2BN2103276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dee505c106fcd16a409555422238b564188cc0a1744f4fc58bc13749cf40a0. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/CA2BN2103277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c765877551d77d8307dd1ff6b6cac80680e668e7a1125ccbaadea784d8de75. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA2BN2103278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59591303e90966c5dedbd97a4317b228749a825c36bf322b33a6f06aeb67b6dc. 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/CA2BN2103279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fa41d3ffde4c1677318869f1c8d2c13fabba2a7b4f6a9b4db490c3d3f9475f. 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/CA2BN2103280.
Unbeatable (British Basketball League Official Anthem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdced6f6d6540daac052a5b04ccf534636291e540961a008c00d3424793567136. 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/QZTAW2211749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1d4ce4403e1ae74b9642ed747d90c3b02e2aa6b7ead5ca2dc5ac916fc41333. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFME2299157.