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 0xdc0ad9bf961454554305e90568992c91de955277b6588b4016d12cdcc2687cd6. 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/fb8e3416-f79d-4aae-b1e2-0e8261e8a19a.json and https://artists.proofprofile.net/proofs/artist/fb8e3416-f79d-4aae-b1e2-0e8261e8a19a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x545f68afafd5f518bcec847704dd162f1839c42214e722f69d80e88aee78ab9e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM22064348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7a7cb6b07b7bfe960b318a23090fb3efb6fa4c770322d7308da203af561bd1. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM22064351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928232d31eaecaafc4dba6176a53059794da15e9e67236b999e0c4632565c21. 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/USHM22064352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ed86077a711b7716655e9d8cd3d34ebd6ec47fe0b6bf5d148e768d06cdf1a8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USHM22064353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a0b74014e635a3f2243578d31c3c5c716150c4b86b34576b777dc181204590. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM22064354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de158cb896918bae8d6ee970a269504043d0580de17ae31f2b4bd541da14152. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USHM82072612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bd5f45ca2816e69810c8e0e839d10ddde11c69fa0b6780da4689a2fe25ab12. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USHM82072613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d675aa65f87599184a124311a57b753d720020360ea122990092d03f6b8af3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USHM82072614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcf6d96a2d6fc328f65663e6ee4be41f4d89e50d42e8edf07d2d315eb64aecb. 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/USHM82072615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d941f0c18b99a8b5a87199ad2cf03a31b5ba8d2b50504ff81f4a763cf3db7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM82072617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1caa5331624156a0f9befa479e03ba28b60dc9f7596eca3a5be67d6e973a448. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM82087340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31138f867c00cac38e1838bd936d2a0133e09ba8869b258c44c00ee474e8ae46. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM82087341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5835cdf6e164079e4317a0124886f275aa5247ab6a4c7003c2303247d7ae0068. 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/USHM82087342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f7f46f3a86a49bec1b9f3fa92c83f1250a04f49bdb7d4e0589b7c2178f0997. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USHM82087343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629434115e4dffde47f33b7bd7e7f3831cbbc5ff81031fe054128e533095d615. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USCGH2100518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb47a83996c274d077b70be10209740da83c0d539d608bcd969979333e52a55d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGH2100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29be9b93c9e8b2c8ef2d19961122ac5362033d535f3e2e65f1dead1dd84af857. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USCGH2100520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe71efa748d89607120b7de651bc78e2d285ec693029307493e1a7c5132a24a3. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USCGH2100521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1f854ca2bd7528a50d8fe8922ec2a49d2481b4095b7fec36faaade02f73fa3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGH2100522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1a54a59fb4922706a39d1c5bceabe38d7cf79f326f7a51e85b6cd1a474bccf. 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/USCGH2100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31248398ed0ae6718ebc7c7ce87a06aa5c3088030b1877b876fee1c4c9bc2921. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USCGH2100524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75b0ad5e8a84ffc0058d00fb8866fa163742eaf8b0cae4e5c26708526db1e97. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGH2100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253b337a3d26e19992cb4d96930740e59515f2cc0a665e3b66d670d930c21fb9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH2100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55c4330bf84c31fb9022988ce7e8dc26546000a9e70dc97ccc9c65c588c85d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USX9P2096925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7685022d019e069c3915f0b94638812c11ad246d3d8963028e0a0139d02f691. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USX9P2096927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b098ec46a71783ac17ed68cdb2cf52ef40648dcad100d87e1e2fac33b1432b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USX9P2096929.
Which Flavor of Ice Cream Would You Like
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e32fbe39451dbd4d4d5609dd06bb6eb45d72c60bcaba533d19f22bff25dba. 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/USX9P2096930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd523038ad9942636bf727e0aaa6d0ad9eeaceabaf020824ab6e978f66625e4f3. 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/USX9P2096931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76e283eeca5693ec5d9bd1a7f616fb9be37e69b6f97231cd2b04d41932a505. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USX9P2096933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92621c00a748364dcf63c1428c5e9846f20564d2d1281899bd3f8c4e6d710c1c. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USX9P2096934.